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Advanced (Type A)
Professional (Type B)
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Codeforces
👻 LeetCode
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codeforce
Codeforces progress
cofo problem
Visualizing how much time I spend on each problem and analyze how much time took to each section like below understand :...
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codeforce 1000-1400
COFO::Progress for 1000-1400
cofo progress
changed to 2023
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Leetcode medium
Leetcode::problem design circular queue
Leetcode ps medium
Leetcode::design circular queue Link : Leetcode:design circular queue Solved, 5 8 7 3 0 level : medium Problem Description...
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Leetcode hard
Leetcode::problem best time to buy and sell stock iv
Leetcode ps hard
Leetcode::best time to buy and sell stock iv Link : Leetcode:best time to buy and sell stock iv Solved, 10 20...
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Leetcode medium
Leetcode::problem smallest missing non negative integer after operations
Leetcode ps medium
Leetcode::smallest missing non negative integer after operations Link : Leetcode:smallest missing non negative integer after operations Solved, 5 10 13 0...
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Leetcode medium
Leetcode::problem number of orders in the backlog
Leetcode ps medium
Leetcode::number of orders in the backlog Link : Leetcode:number of orders in the backlog Solved, 10 10 20 2 0 level...
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Leetcode medium
Leetcode::problem taking maximum energy from the mystic dungeon
Leetcode ps medium
Leetcode::taking maximum energy from the mystic dungeon Link : Leetcode:taking maximum energy from the mystic dungeon Solved, 3 3 3 0...
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Leetcode medium
Leetcode::problem find the minimum area to cover all ones 1
Leetcode ps medium
Leetcode::find the minimum area to cover all ones 1 Link : Leetcode:find the minimum area to cover all ones 1 Solved,...
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Leetcode medium
Leetcode::problem binary subarrays with sum
Leetcode ps medium
Leetcode::binary subarrays with sum Link : Leetcode:binary subarrays with sum Solved, algorithm 120 level : medium Problem Description ...
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Leetcode hard
Leetcode::problem binary subarrays with sum
Leetcode ps hard
Leetcode::binary subarrays with sum Link : Leetcode:binary subarrays with sum Solved, ry-subarrays-with-sum algorithm 120 level : hard Problem Description ...
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Leetcode medium
Leetcode::problem edit distance
Leetcode ps medium
Leetcode::edit distance Link : Leetcode:edit distance Solved, algorithm 120 level : medium Problem Description Given two strings word1...
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Leetcode easy
Leetcode::problem first bad version
Leetcode ps easy
Leetcode::first bad version Link : Leetcode:first bad version Solved, 3 3 3 0 0 level : easy Problem Description...
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Leetcode easy
Leetcode::problem find subsequence of length k with the largest sum
Leetcode ps easy
Leetcode::find subsequence of length k with the largest sum Link : Leetcode:find subsequence of length k with the largest sum Solved,...
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Leetcode medium
Leetcode::problem surrounded regions
Leetcode ps medium
Leetcode::surrounded regions Link : Leetcode:surrounded regions Solved, 5 5 10 5 0 level : medium Problem Description Given...
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Leetcode easy
Leetcode::problem assign cookies
Leetcode ps easy
Leetcode::assign cookies Link : Leetcode:assign cookies Solved, 3 3 3 2 0 level : easy Problem Description Assume...
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Leetcode easy
Leetcode::problem maximum difference between even and odd frequency 1
Leetcode ps easy
Leetcode::maximum difference between even and odd frequency 1 Link : Leetcode:maximum difference between even and odd frequency 1 Solved, 2 4...
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Leetcode medium
Leetcode::problem find closest node to given two nodes
Leetcode ps medium
Leetcode::find closest node to given two nodes Link : Leetcode:find closest node to given two nodes Solved, 7 10 5 0...
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Leetcode medium
Leetcode::problem repeated dna sequences
Leetcode ps medium
Leetcode::repeated dna sequences Link : Leetcode:repeated dna sequences Solved, 2 3 5 0 80 level : medium Problem Description...
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Leetcode medium
Leetcode::problem remove nodes from linked list
Leetcode ps medium
Leetcode::remove nodes from linked list Link : Leetcode:remove nodes from linked list Solved, 5 15 10 0 60 level : medium...
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Leetcode medium
Leetcode::problem maximum product subarray
Leetcode ps medium
Leetcode::maximum product subarray Link : Leetcode:maximum product subarray Solved, 5 20 18 0 10 level : medium Problem Description...
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Leetcode medium
Leetcode::problem find words containing character
Leetcode ps medium
Leetcode::find words containing character Link : Leetcode:find words containing character Solved, 2 2 2 0 0 level : medium Problem...
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Leetcode medium
Leetcode::problem non overlapping intervals
Leetcode ps medium
Leetcode::non overlapping intervals Link : Leetcode:non overlapping intervals Solved, 3 15 8 2 10 level : medium Problem Description...
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Leetcode medium
Leetcode::problem snakes and ladders
Leetcode ps medium
Leetcode::snakes and ladders Link : Leetcode:snakes and ladders Solved, 5 60 30 13 60 level : medium Problem Description...
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Leetcode medium
Leetcode::problem find all duplicates in an array
Leetcode ps medium
Leetcode::find all duplicates in an array Link : Leetcode:find all duplicates in an array Solved, algorithm 42 level : medium ...
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Leetcode medium
Leetcode::problem peak index in a mountain array
Leetcode ps medium
Leetcode::peak index in a mountain array Link : Leetcode:peak index in a mountain array Solved, 5 30 8 0 2 level...
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Leetcode medium
Leetcode::problem house robber 2
Leetcode ps medium
Leetcode::house robber 2 Link : Leetcode:house robber 2 Solved, algorithm 60 level : medium Problem Description Given an...
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Leetcode easy
Leetcode::problem next greater element 1
Leetcode ps easy
Leetcode::next greater element 1 Link : Leetcode:next greater element 1 Solved, algorithm 180 level : easy Problem Description ...
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Leetcode easy
Leetcode::problem check if array is sorted and rotated
Leetcode ps easy
Leetcode::check if array is sorted and rotated Link : Leetcode:check if array is sorted and rotated Solved, 5 5...
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Leetcode medium
Leetcode::problem the latest time to catch a bus
Leetcode ps medium
Leetcode::the latest time to catch a bus Link : Leetcode:the latest time to catch a bus Solved, algorithm 180 level :...
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Leetcode medium
Leetcode::problem accounts merge
Leetcode ps medium
Leetcode::accounts merge Link : Leetcode:accounts merge Solved, algorithm 180 level : medium Problem Description Given a list of...
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Leetcode medium
Leetcode::problem domino and tromino tiling
Leetcode ps medium
Leetcode::domino and tromino tiling Link : Leetcode:domino and tromino tiling Solved, algorithm 180 level : medium point You...
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Leetcode medium
Leetcode::problem majority element 2
Leetcode ps medium
Leetcode::majority element 2 Link : Leetcode:majority element 2 Solved, algorithm 62 level : medium point Giv en an...
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Leetcode medium
Leetcode::problem count complete subarrays in an array
Leetcode ps medium
Leetcode::count complete subarrays in an array Link : Leetcode:count complete subarrays in an array Solved, 5 15 10 0 30 level...
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Leetcode medium
Leetcode::problem search in rotated sorted array 2
Leetcode ps medium
Leetcode::search in rotated sorted array 2 Link : Leetcode:search in rotated sorted array 2 Solved, algorithm 70 level : medium ...
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Leetcode easy
Leetcode::problem power of four
Leetcode ps easy
Leetcode::power of four Link : Leetcode:power of four Solved, 3 3 3 0 60 level : easy point ...
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Leetcode medium
Leetcode::problem 4Sum
Leetcode ps medium
Leetcode::4Sum Link : Leetcode:4Sum Solved, algorithm 180 level : medium point Given an array nums of n integers,...
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Leetcode medium
Leetcode::problem single number 2
Leetcode ps medium
Leetcode::single number 2 Link : Leetcode:single number 2 Solved, 2 3 1 0 40 level : medium point ...
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Leetcode medium
Leetcode::problem make array non decreasing
Leetcode ps medium
Leetcode::make array non decreasing Link : Leetcode:make array non decreasing Solved, 5 15 10 0 0 level : medium <h1...
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Leetcode medium
Leetcode::problem reveal cards in increasing order
Leetcode ps medium
Leetcode::reveal cards in increasing order Link : Leetcode:reveal cards in increasing order Solved, 5 30 15 5 35 level : medium...
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Leetcode easy
Leetcode::problem same tree
Leetcode ps easy
Leetcode::same tree Link : Leetcode:same tree Solved, 3 3 3 0 0 level : easy point Given the...
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Leetcode medium
Leetcode::problem partition equal subset sum
Leetcode ps medium
Leetcode::partition equal subset sum Link : Leetcode:partition equal subset sum Solved, algorithm 90 level : medium point Given...
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Leetcode medium
Leetcode::problem fruit into baskets
Leetcode ps medium
Leetcode::fruit into baskets Link : Leetcode:fruit into baskets Solved, 2 5 5 0 13 level : medium point ...
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Leetcode medium
Leetcode::problem count days without meetings
Leetcode ps medium
Leetcode::count days without meetings Link : Leetcode:count days without meetings Solved, 2 5 20 0 15 level : medium <h1...
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Leetcode medium
Leetcode::problem apply substitutions
Leetcode ps medium
Leetcode::apply substitutions Link : Leetcode:apply substitutions Solved, 5 10 25 2 0 level : medium point You are...
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Leetcode medium
Leetcode::problem maximum points you can obtain from cards
Leetcode ps medium
Leetcode::maximum points you can obtain from cards Link : Leetcode:maximum points you can obtain from cards Solved, 5 5 10 0...
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Leetcode easy
Leetcode::problem move zeros
Leetcode ps easy
Leetcode::move zeros Link : Leetcode:move zeros Solved, 5 5 10 0 30 level : easy point Given an...
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Leetcode medium
Leetcode::problem move pieces to obtain a string
Leetcode ps medium
Leetcode::move pieces to obtain a string Link : Leetcode:move pieces to obtain a string Solved, 5 5 10 5 5 level...
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Leetcode medium
Leetcode::problem partition labels
Leetcode ps medium
Leetcode::partition labels Link : Leetcode:partition labels Solved, 5 15 10 4 5 level : medium point You are...
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Leetcode medium
Leetcode::problem flip equivalent binary trees
Leetcode ps medium
Leetcode::flip equivalent binary trees Link : Leetcode:flip equivalent binary trees Solved, 10 10 15 40 2 level : medium <h1...
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Leetcode easy
Leetcode::problem replace elements with greatest element on right side
Leetcode ps easy
Leetcode::replace elements with greatest element on right side Link : Leetcode:replace elements with greatest element on right side Solved, 3 10...
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Leetcode easy
Leetcode::problem minimum cuts to divide a circle
Leetcode ps easy
Leetcode::minimum cuts to divide a circle Link : Leetcode:minimum cuts to divide a circle Solved, 5 2 2 0 0 level...
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Leetcode easy
Leetcode::problem maximum depth of binary tree
Leetcode ps easy
Leetcode::maximum depth of binary tree Link : Leetcode:maximum depth of binary tree Solved, 3 5 30 30 3 level : easy...
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Leetcode easy
Leetcode::problem find the index of the first occurrence in a string
Leetcode ps easy
Leetcode::find the index of the first occurrence in a string Link : Leetcode:find the index of the first occurrence in a...
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Leetcode easy
Leetcode::problem count good triplets
Leetcode ps easy
Leetcode::count good triplets Link : Leetcode:count good triplets Solved, 3 3 3 0 0 level : easy point ...
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Leetcode easy
Leetcode::problem count equal and divisible pairs in an array
Leetcode ps easy
Leetcode::count equal and divisible pairs in an array Link : Leetcode:count equal and divisible pairs in an array Solved, 10 5...
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Leetcode easy
Leetcode::problem clear digits
Leetcode ps easy
Leetcode::clear digits Link : Leetcode:clear digits Solved, 3 3 3 0 0 level : easy point Return the...
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Leetcode easy
Leetcode::problem add two integers
Leetcode ps easy
Leetcode::add two integers Link : Leetcode:add two integers Solved, 1 1 1 0 0 level : easy point ...
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Leetcode medium
Leetcode::problem bulb switcher
Leetcode ps medium
Leetcode::bulb switcher Link : Leetcode:bulb switcher Solved, algorithm 60 level : medium point Return the number of bulbs...
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Leetcode easy
Leetcode::problem contains duplicate 2
Leetcode ps easy
Leetcode::contains duplicate 2 Link : Leetcode:contains duplicate 2 Solved, 2 2 2 0 0 level : easy point ...
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Leetcode medium
Leetcode::problem search a 2d matrix
Leetcode ps medium
Leetcode::search a 2d matrix Link : Leetcode:search a 2d matrix Solved, 2 3 5 20 3 level : medium <h1...
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Leetcode medium
Leetcode::problem shortest path in binary matrix
Leetcode ps medium
Leetcode::shortest path in binary matrix Link : Leetcode:shortest path in binary matrix Solved, 5 5 5 0 60 level : medium...
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Leetcode medium
Leetcode::problem count and say
Leetcode ps medium
Leetcode::count and say Link : Leetcode:count and say Solved, 5 5 10 10 10 level : medium point ...
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Leetcode easy
Leetcode::problem minimum number of operations to make elements in array distinct
Leetcode ps easy
Leetcode::minimum number of operations to make elements in array distinct Link : Leetcode:minimum number of operations to make elements in array...
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Leetcode medium
Leetcode::problem 3sum closest
Leetcode ps medium
Leetcode::3sum closest Link : Leetcode:3sum closest Solved, algorithm 60 level : medium point Given an integer array nums...
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Leetcode hard
Leetcode::problem number of digit one
Leetcode ps hard
Leetcode::number of digit one Link : Leetcode:number of digit one Solved, 5 120 30 10 30 level : hard <h1...
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Leetcode easy
Leetcode::problem power of three
Leetcode ps easy
Leetcode::power of three Link : Leetcode:power of three Solved, 5 15 10 0 30 level : easy point ...
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Leetcode easy
Leetcode::problem missing number
Leetcode ps easy
Leetcode::missing number Link : Leetcode:missing number Solved, 2 2 2 0 30 level : easy point Given an...
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Leetcode medium
Leetcode::problem check if number is a sum of powers of three
Leetcode ps medium
Leetcode::check if number is a sum of powers of three Link : Leetcode:check if number is a sum of powers...
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Leetcode easy
Leetcode::problem perfect number
Leetcode ps easy
Leetcode::perfect number Link : Leetcode:perfect number Solved, 1 2 2 0 0 level : easy point A perfect...
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Leetcode easy
Leetcode::problem reverse string 2
Leetcode ps easy
Leetcode::reverse string 2 Link : Leetcode:reverse string 2 Solved, 1 1 1 1 0 level : easy point ...
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Leetcode medium
Leetcode::problem length of longest fibonacci subsequence
Leetcode ps medium
Leetcode::length of longest fibonacci subsequence Link : Leetcode:length of longest fibonacci subsequence Solved, 3 10 5 0 97 level : medium...
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Leetcode easy
Leetcode::problem valid anagram
Leetcode ps easy
Leetcode::valid anagram Link : Leetcode:valid anagram Solved, 1 1 1 1 0 level : easy point Given two...
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Leetcode medium
Leetcode::problem longest nice subarray
Leetcode ps medium
Leetcode::longest nice subarray Link : Leetcode:longest nice subarray Solved, algorithm 70 level : medium point You are given...
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Leetcode medium
Leetcode::problem count triplets that can form two arrays of equal xor
Leetcode ps medium
Leetcode::count triplets that can form two arrays of equal xor Link : Leetcode:count triplets that can form two arrays of equal...
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Leetcode hard
Leetcode::problem russian doll envelopes
Leetcode ps hard
Leetcode::russian doll envelopes Link : Leetcode:russian doll envelopes Failed, algorithm 65 level : hard point You are given...
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Leetcode easy
Leetcode::problem kids with the greatest number of candies
Leetcode ps easy
Leetcode::kids with the greatest number of candies Link : Leetcode:kids with the greatest number of candies Solved, 1 2 3 0...
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Leetcode medium
Leetcode::problem minimum operations to make binary array elements equal to one 1
Leetcode ps medium
Leetcode::minimum operations to make binary array elements equal to one 1 Link : Leetcode:minimum operations to make binary array elements equal...
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Leetcode medium
Leetcode::problem zero array transformation 2
Leetcode ps medium
Leetcode::zero array transformation 2 Link : Leetcode:zero array transformation 2 Solved, 5 60 25 0 30 level : medium <h1...
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Leetcode easy
Leetcode::problem find the difference
Leetcode ps easy
Leetcode::find the difference Link : Leetcode:find the difference Solved, 1 1 3 0 5 level : easy point ...
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Leetcode medium
Leetcode::problem remove all occurrences of a substring
Leetcode ps medium
Leetcode::remove all occurrences of a substring Link : Leetcode:remove all occurrences of a substring Solved, 4 5 5 0 120 level...
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Leetcode easy
Leetcode::problem add strings
Leetcode ps easy
Leetcode::add strings Link : Leetcode:add strings Solved, 2 3 5 0 0 level : easy point Given two...
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Leetcode medium
Leetcode::problem zero array transformation 1
Leetcode ps medium
Leetcode::zero array transformation 1 Link : Leetcode:zero array transformation 1 Solved, 2 7 3 0 30 level : medium <h1...
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Leetcode easy
Leetcode::problem find numbers with even number of digits
Leetcode ps easy
Leetcode::find numbers with even number of digits Link : Leetcode:find numbers with even number of digits Solved, 1 1 1 0...
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Leetcode medium
Leetcode::problem max sum of a pair with equal sum of digits
Leetcode ps medium
Leetcode::max sum of a pair with equal sum of digits Link : Leetcode:max sum of a pair with equal sum of...
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Leetcode medium
Leetcode::problem number of provinces
Leetcode ps medium
Leetcode::number of provinces Link : Leetcode:number of provinces Solved, 5 10 5 5 2 level : medium point ...
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Leetcode medium
Leetcode::problem palindrome partitioning
Leetcode ps medium
Leetcode::palindrome partitioning Link : Leetcode:palindrome partitioning Solved, 5 10 7 0 10 level : medium point Given a...
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Leetcode medium
Leetcode::problem count number of bad pairs
Leetcode ps medium
Leetcode::count number of bad pairs Link : Leetcode:count number of bad pairs Solved, algorithm 30 level : medium Used all hints...
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Leetcode easy
Leetcode::problem max consecutive ones
Leetcode ps easy
Leetcode::max consecutive ones Link : Leetcode:max consecutive ones Solved, 1 1 1 0 0 level : easy point ...
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Leetcode hard
Leetcode::problem candy
Leetcode ps hard
Leetcode::candy Link : Leetcode:candy Solved, 5 50 9 5 120 level : hard point There are n children...
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Leetcode medium
Leetcode::problem group shifted strings
Leetcode ps medium
Leetcode::group shifted strings Link : Leetcode:group shifted strings Solved, 5 5 5 0 5 level : medium point ...
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Leetcode medium
Leetcode::problem frequency of the most frequent element
Leetcode ps medium
Leetcode::frequency of the most frequent element Link : Leetcode:frequency of the most frequent element Solved, algorithm 90 level : medium ...
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Leetcode hard
Leetcode::problem frequency of the most frequent element
Leetcode ps hard
Leetcode::frequency of the most frequent element Link : Leetcode:frequency of the most frequent element Solved, uency-of-the-most-frequent-element algorithm 90 level : hard...
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Leetcode medium
Leetcode::problem capacity to ship packages within d days
Leetcode ps medium
Leetcode::capacity to ship packages within d days Link : Leetcode:capacity to ship packages within d days Solved, 5 8 7 2...
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Leetcode hard
Leetcode::problem capacity to ship packages within d days
Leetcode ps hard
Leetcode::capacity to ship packages within d days Link : Leetcode:capacity to ship packages within d days Solved, city-to-ship-packages-within-d-days 5 8 7...
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Leetcode medium
Leetcode::problem longest consecutive sequence
Leetcode ps medium
Leetcode::longest consecutive sequence Link : Leetcode:longest consecutive sequence Solved, 5 20 15 15 25 level : medium point ...
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Leetcode medium
Leetcode::problem redundant connection
Leetcode ps medium
Leetcode::redundant connection Link : Leetcode:redundant connection Solved, 5 5 30 0 120 level : medium point You are...
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Leetcode medium
Leetcode::problem longest repeating character replacement
Leetcode ps medium
Leetcode::longest repeating character replacement Link : Leetcode:longest repeating character replacement Solved, algorithm 120 level : medium point You...
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Leetcode hard
Leetcode::problem longest repeating character replacement
Leetcode ps hard
Leetcode::longest repeating character replacement Link : Leetcode:longest repeating character replacement Solved, est-repeating-character-replacement algorithm 120 level : hard point ...
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Leetcode medium
Leetcode::problem gas station
Leetcode ps medium
Leetcode::gas station Link : Leetcode:gas station Solved, algorithm 90 level : medium point N gas Stations along a...
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Leetcode medium
Leetcode::problem rotate array
Leetcode ps medium
Leetcode::rotate array Link : Leetcode:rotate array Solved, 5 30 1 0 0 level : medium point Given an...
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Leetcode hard
Leetcode::problem largest rectangle in histogram
Leetcode ps hard
Leetcode::largest rectangle in histogram Link : Leetcode:largest rectangle in histogram Solved, est-rectangle-in-histogram algorithm 120 level : hard point ...
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Leetcode easy
Leetcode::problem single number
Leetcode ps easy
Leetcode::single number Link : Leetcode:single number Solved, algorithm 60 level : easy point Given a non-empty array of...
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Leetcode easy
Leetcode::problem transpose matrix
Leetcode ps easy
Leetcode::transpose matrix Link : Leetcode:transpose matrix Solved, 5 3 2 0 0 level : easy point Given a...
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Leetcode easy
Leetcode::problem palindrome linked list
Leetcode ps easy
Leetcode::palindrome linked list Link : Leetcode:palindrome linked list Solved, 2 5 5 5 120 level : easy point ...
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Leetcode easy
Leetcode::problem fizz buzz
Leetcode ps easy
Leetcode::fizz buzz Link : Leetcode:fizz buzz Solved, 2 3 3 0 0 level : easy point Given an...
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Leetcode medium
Leetcode::problem reverse words in a string
Leetcode ps medium
Leetcode::reverse words in a string Link : Leetcode:reverse words in a string Solved, 3 10 10 2 2 level : medium...
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Leetcode medium
Leetcode::problem longest continuous subarray with absolute diff less than or equal to limit
Leetcode ps medium
Leetcode::longest continuous subarray with absolute diff less than or equal to limit Link : Leetcode:longest continuous subarray with absolute diff less...
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Leetcode medium
Leetcode::problem rotting oranges
Leetcode ps medium
Leetcode::rotting oranges Link : Leetcode:rotting oranges Solved, 5 5 15 5 3 level : medium point You are...
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Leetcode medium
Leetcode::problem asteroid collision
Leetcode ps medium
Leetcode::asteroid collision Link : Leetcode:asteroid collision Solved, 5 15 20 40 3 level : medium point We are...
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Leetcode easy
Leetcode::problem search insert position
Leetcode ps easy
Leetcode::search insert position Link : Leetcode:search insert position Solved, 2 2 5 5 5 level : easy point ...
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Leetcode medium
Leetcode::problem string compressiona
Leetcode ps medium
Leetcode::string compression Link : Leetcode:string compression Solved, 10 5 10 5 0 level : medium point Given an...
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Leetcode easy
Leetcode::problem(1768) Merge Strings Alternately
Leetcode ps easy
Leetcode::Merge Strings Alternately Link : Leetcode::Merge Strings Alternately level : easy point Two strings...
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Leetcode medium
Leetcode::problem(939) Minimum Area Rectangle
Leetcode ps medium
Leetcode::Minimum Area Rectangle Link : Leetcode::Minimum Area Rectangle level : medium algorithm : 20m code : 20m...
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Leetcode medium
Leetcode::problem(1650) Lowest Common Ancestor of a Binary Tree 3
Leetcode ps medium
Leetcode::Lowest Common Ancestor of a Binary Tree 3 Link : Leetcode::Lowest Common Ancestor of a Binary Tree 3 level...
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Leetcode medium
Leetcode::problem(162) Find Peak Element
Leetcode ps medium
Leetcode::Find Peak Element Link : Leetcode::Find Peak Element level : medium 40 mins to solve. Need to understand the...
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Leetcode medium
Leetcode::problem(314) Binary Tree Vertical Order Traversal
Leetcode ps medium
Leetcode::Binary Tree Vertical Order Traversal Link : Leetcode::Binary Tree Vertical Order Traversal level : medium failed to solve, but...
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Leetcode easy
Leetcode::problem(408) Valid Word Abbreviation
Leetcode ps easy
Leetcode::Valid Word Abbreviation Link : Leetcode::Valid Word Abbreviation level : easy took 22 mins to solve. point...
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Leetcode medium
Leetcode::problem(973) K Closest points to origin
Leetcode ps medium
Leetcode::K Closest Points to origin Link : Leetcode::K Closest Points to origin level : medium took 15 mins to...
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Leetcode medium
Leetcode::problem(50) Pow(x, n)
Leetcode ps medium
Leetcode::Pow(x, n) Link : Leetcode::Pow(x, n) level : medium took 13 mins to solve point implement...
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Leetcode easy
Leetcode::problem(680) Valid Palindrome 2
Leetcode ps easy
Leetcode::Valid Palindrome 2 Link : Leetcode::Valid Palindrome 2 level : easy took 10 mins to solve point...
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Leetcode medium
Leetcode::problem(31) Next Permutation
Leetcode ps medium
Leetcode::Next Permutation Link : Leetcode::Next Permutation level : medium took 43mins to solve point Given an...
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Leetcode medium
Leetcode::problem(525) Contiguous Array
Leetcode ps medium
Leetcode::Contiguous Array Link : Leetcode::Contiguous Array level : medium fail to come up with the idea point...
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Leetcode medium
Leetcode::problem(215) Kth Largest Element in an array
Leetcode ps medium
Leetcode::Kth Largest Element in an array Link : Leetcode::Kth Largest Element in an array ...
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Leetcode medium
Leetcode::problem(15) 3Sum
Leetcode ps medium
Leetcode::3Sum Link : Leetcode::3Sum level : medium failed on algorithm point Given an integer array nums,...
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Leetcode medium
Leetcode::problem(1004) Max Consecutive Ones 3
Leetcode ps medium
Leetcode::Max Consecutive Ones 3 Link : Leetcode::Max Consecutive Ones 3 level : medium Failed to come up with the...
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Leetcode medium
Leetcode::problem(236) Lowest Common Ancestor of a Binary Tree
Leetcode ps medium
Leetcode::Lowest Common Ancestor of a Binary Tree Link : Leetcode::Lowest Common Ancestor of a Binary Tree level : medium...
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Leetcod hard
Leetcode::problem(975) Odd Even Jump
Leetcode ps hard
Leetcode::Odd Even Jump Link : Leetcode::Odd Even Jump level : medium Took 1hr and 27 mins I solved with...
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Leetcod hard
Leetcode::problem(1857) Largest Color Value in a Directed Graph
Leetcode ps hard
Leetcode::Largest Color Value in a Directed Graph Link : Leetcode::Largest Color Value in a Directed Graph level : hard...
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Leetcod hard
Leetcode::problem(1125) Smallest Sufficient Team
Leetcode ps hard
Leetcode::Smallest Sufficient Team Link : Leetcode::Smallest Sufficient Team level : hard Tried for 150m, solved by referring to Edit...
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Leetcode medium
Leetcode::problem(1820) Maximum Number of Accepted Invitations
Leetcode ps medium
Leetcode::Maximum Number of Accepted Invitations Link : Leetcode::Maximum Number of Accepted Invitations level : medium <h1...
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Leetcod hard
Leetcode::problem(1235) Maximum Profit in Job Scheduling
Leetcode ps hard
Leetcode::Maximum Profit in Job Scheduling Link : Leetcode::Maximum Profit in Job Scheduling level : hard Tried for 120 mins,...
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Leetcode medium
Leetcode::problem(1110) Delete Noedes and Return Forest
Leetcode ps medium
Leetcode::Delete Nodes and Return Forest Link : Leetcode::Delete Nodes and Return Forest level : medium 31mins to solve ...
-
Leetcode medium
Leetcode::problem(418) Sentence Screen Fitting
Leetcode ps medium
Leetcode::Sentence Screen Fitting Link : Leetcode::Sentence Screen Fitting level : medium 35mins to solve point Given...
-
Leetcod hard
Leetcode::problem(2402) Meeting Rooms iii (3)
Leetcode ps hard
Leetcode::Meeting Rooms iii (3) Link : Leetcode::Meeting Rooms iii (3) level : hard failed for solving The reason was...
-
Leetcode medium
Leetcode::problem(417) Pacific Atlantic Water Flow
Leetcode ps medium
Leetcode::Pacific Atlantic Water Flow Link : Leetcode::Pacific Atlantic Water Flow level : medium point ...
-
Leetcode medium
Leetcode::problem(2316) Count Unreachable Pairs of Nodes in an Undirected Graph
Leetcode ps medium
Leetcode::Count Unreachable pairs of nodes in an undirected graph Link : Leetcode::Count unreachable pairs of nodes in an undirected graph...
-
Leetcode medium
Leetcode::problem(690) Employee Importance
Leetcode ps medium
Leetcode::Employee Importance Link : Leetcode::Employee Importance level : medium 20 mins to solve point A data...
-
Leetcode medium
Leetcode::problem(365) Water and Jug Problem
Leetcode ps medium
Leetcode::Water and Jug Problem Link : Leetcode::Water and Jug Problem Useful link for Bezouts identity level : medium fail to...
-
Leetcode medium
Leetcode::problem(366) Find Leaves of Binary Tree
Leetcode ps medium
Leetcode::Find Leaves of Binary Tree Link : Leetcode::Find Leaves of Binary Tree level : medium 23 mins to solve...
-
Leetcode medium
Leetcode::problem(833) Find And Replace in String
Leetcode ps medium
Leetcode::Find and replace in string Link : Leetcode::Find and replace in string level : medium 47 mins to solve...
-
Leetcode medium
Leetcode::problem(247) Strobogrammatic Number 2
Leetcode ps medium
Leetcode::Strobogrammatic Number 2 Link : Leetcode::Strobogrammatic Number 2 level : medium 48 mins to solve point ...
-
Leetcode medium
Leetcode::problem(681) Next Closest Time
Leetcode ps medium
Leetcode::Next Closest Time Link : Leetcode::Next Closest Time level : medium 38mins to solve point Given...
-
Leetcode medium
Leetcode::problem(1509) Minimum Difference Between Largest and Smallest Value in Three Moves
Leetcode ps medium
Leetcode::Minimum Difference Between Largest and Smallest Value in Three Moves Link : Leetcode::Minimum Difference Between Largest and Smallest Value in...
-
Leetcode medium
Leetcode::problem(678) Valid Parenthesis String
Leetcode ps medium
Leetcode::Valid Parenthesis String Link : Leetcode::Valid Parenthesis String level : medium 10mins to solve point Given...
-
Leetcode medium
Leetcode::problem(1249) minimum remove to make valid parentheses
Leetcode ps medium
Leetcode::Minimum Remove to Make Valid Parentheses Link : Leetcode::Minimum Remove to Make Valid Parentheses level : medium 10 mins...
-
Leetcode medium
Leetcode::problem(1136) Parallel Courses
Leetcode ps medium
Leetcode::Parallel Courses Link : Leetcode::Parallel Courses level : medium 20mins to solve point You are given...
-
Leetcode medium
Leetcode::problem(2863) Maximum Length of Semi-Decreasing Subarrays
Leetcode ps medium
Leetcode::Maximum Length of Semi-Decreasing Subarrays Link : Leetcode::Maximum Length of Semi-Decreasing Subarrays level : medium 47mins to solve ...
-
Leetcode medium
Leetcode::problem(2116) Check if a Parentheses String Can be valid
Leetcode ps medium
Leetcode::Check if a parentheses string can be valid Link : Leetcode::Check if a parentheses string can be valid level...
-
Leetcode medium
Leetcode::problem(1101) The Earliest Moment When Everyone Become Friends
Leetcode ps medium
Leetcode::The Earliest Moment When Everyone Become Friends Link : Leetcode::The Earliest Moment When Everyone Become Friends level :...
-
Leetcode medium
Leetcode::problem(347) Top K Frequent Elements
Leetcode ps medium
Leetcode::Top K Frequent Elements Link : Leetcode::Top K Frequent Elements level : medium point ...
-
Leetcode medium
Leetcode::problem(45) Jump Game 2
Leetcode ps medium
Leetcode::Jump Game 2 Link : Leetcode::Jump Game 2 level : medium point You are...
-
Leetcode medium
Leetcode::problem(2265) Count Nodes Equal to Average of Subtree
Leetcode ps medium
Leetcode::Count Nodes Equal to Average of Subtree Link : Leetcode::Count Nodes Equal to Average of Subtree level :...
-
Leetcode medium
Leetcode::problem(207) Course Schedule
Leetcode ps medium
Leetcode::Course Schedule Link : Leetcode::Course Schedule level : medium failed : 120 Solved with edit’s way point...
-
Leetcode medium
Leetcode::problem(900) RLE Iterator
Leetcode ps medium
Leetcode::RLE Iterator Link : Leetcode::RLE Iterator level : medium point Run-Length encoded array is...
-
Leetcode medium
Leetcode::problem(54) Spiral Matrix
Leetcode ps medium
Leetcode::Spiral Matrix Link : Leetcode::Spiral Matrix level : medium point Given an m x...
-
Leetcode medium
Leetcode::problem(71) Simplify Path
Leetcode ps medium
Leetcode::Simplify Path Link : Leetcode::Simplify Path level : medium point Given a string path,...
-
Leetcode medium
Leetcode::problem(540) Single Element in a Sorted Array
Leetcode ps medium
Leetcode::Single Element in a Sorted Array Link : Leetcode::Single Element in a Sorted Array level : medium ...
-
Leetcode medium
Leetcode::problem(11) Container With Most Water
Leetcode ps medium
Leetcode::Container With Most Water Link : Leetcode::Container With Most Water level : medium point ...
-
Leetcode medium
Leetcode::problem(71) Simplify path
Leetcode ps medium
Leetcode:Simplify Path Link : Leetcode::Simplify path level : medium point A directory type string...
-
Leetcode medium
Leetcode::problem(11) container with most water
Leetcode ps medium
Leetcode::Continaer with most water Link : Leetcode::Container with most water level : medium point ...
-
Leetcode medium
Leetcode::problem(75) Sort colors
Leetcode ps medium
Leetcode::Sort Colors Link : Leetcode::Sort Colors level : medium point Given an array nums...
-
Leetcode medium
Leetcode::problem(56) Merge Intervals
Leetcode ps medium
Leetcode::Merge Intervals Link : Leetcode::Merge Intervals level : medium point Given an array of...
-
Leetcode medium
Leetcode::problem(57) Insert Interval
Leetcode ps medium
Leetcode::Insert Interval Link : Leetcode::Insert Interval level : medium fail to solve point...
-
Leetcode medium
Leetcode::problem(48) Rotate Image
Leetcode ps medium
Leetcode::Rotate Image Link : Leetcode::Rotate Image level : medium point n x n 2D...
-
Leetcode medium
Leetcode::problem(34) Find First and Last Position of Element in Sorted Array
Leetcode ps medium
Leetcode::Find First and Last Position of Element in Sorted Array Link : Leetcode::Find First and Last Position of Element in...
-
Leetcode medium
Leetcode::problem(22) Generate Parentheses
Leetcode ps medium
Leetcode::Generate Parentheses Link : Leetcode::Generate Parentheses level : medium point Given n pairs of...
-
Leetcode medium
Leetcode::problem(647) Palindromic Substring
Leetcode ps medium
Leetcode::Palindromic Substring Link : Leetcode::Palindromic Substring level : medium point Given a string s,...
-
Leetcode medium
Leetcode::problem(1254) Number of Closed Islands
Leetcode ps medium
Leetcode::Number of Closed Islands Link : Leetcode::Number of Closed Islands level : medium point ...
-
Leetcode medium
Leetcode::problem(2510) Check if there is a Path with equal number of 1's and 0's
Leetcode ps medium
Leetcode::Check if there is a path with equal number of 1’s and 0’s Link : Leetcode::Check if there is a...
-
Leetcode medium
Leetcode::problem(2104) Sum of Subarray Ranges
Leetcode ps medium
Leetcode::Sum of Subarray Ranges Link : Leetcode::Sum of Subarray Ranges level : medium point ...
-
Leetcode medium
Leetcode::problem(875) Koko Eating Bananas
Leetcode ps medium
Leetcode::Koko Eating Bananas Link : Leetcode::Koko Eating Bananas level : medium point Return the...
-
Leetcode medium
Leetcode::problem(394) Decode String
Leetcode ps medium
Leetcode::Decode String Link : Leetcode::Decode String level : medium point Encoded string is given,...
-
Leetcode medium
Leetcode::problem(33) Search in Rotated Sorted Array
Leetcode ps medium
Leetcode::Search in Rotated Sorted Array Link : Leetcode::Search in Rotated Sorted Array level : medium <h1...
-
Leetcode medium
Leetcode::problem(946) Validate Stack Sequence
Leetcode ps medium
Leetcode::Validate Stack Sequence Link : Leetcode::Validate Stack Sequence level : medium point Given two...
-
Leetcode medium
Leetcode::problem(1020) Number of Enclaves
Leetcode ps medium
Leetcode::Number of Enclaves Link : Leetcode::Number of Enclaves level : medium point Find the...
-
Leetcode medium
Leetcode::problem(581) Shortest Unsorted Continuous Subarray
Leetcode ps medium
Leetcode::Shortest Unsorted Continuous Subarray Link : Leetcode::Shorted Unsorted Continuous Subarray level : medium point ...
-
Leetcode medium
Leetcode::problem(402) Remove K Digits
Leetcode ps medium
Leetcode::Remove K digits Link : Leetcode::Remove K Digits level : medium fail Tried 120min point Given...
-
Leetcode easy
Leetcode::problem(1360) Number of Days Between Two Dates
Leetcode ps easy
Leetcode::Number of Days Between Two Dates Link : Leetcode::Number of Days Between Two Dates level : easy ...
-
Leetcod hard
Leetcode::problem(295) Find Median from Data Stream
Leetcode ps hard
Leetcode::Find Median from Data Stream Link : Leetcode::Find Median From Data Stream level : hard <h1...
-
Leetcode easy
Leetcode::problem(14) Longest Common Prefix
Leetcode ps easy
Leetcode::Longest Common Prefix Link : Leetcode::Longest Common Prefix level : easy point Write a...
-
Leetcod hard
Leetcode::problem(273) Integer to English Words
Leetcode ps hard
Leetcode::Integer to English Words Link : Leetcode::Integer to English Words level : hard point ...
-
Leetcod hard
Leetcode::problem(42) Trapping Rain Water
Leetcode ps hard
Leetcode::Trapping Rain Water Link : Leetcode::Trapping Rain Water level : hard point There are...
-
Leetcode easy
Leetcode::problem(26) Remove Dumplicates from Sorted Array
Leetcode ps easy
Leetcode::Remove Duplicates from Sorted Array Link : Leetcode::Remove Duplicates from sorted array level : easy <h1...
-
Leetcode medium
Leetcode::problem(36) Valid Sudoku
Leetcode ps medium
Leetcode::Valid Sudoku Link : Leetcode::Valid Sudoku level : medium point A 9x9 sudoku board...
-
Leetcod easy
Leetcode::problem(20) valid parentheses
Leetcode ps easy
Leetcode::Valid Parentheses Link : Leetcode::Valid Parentheses level : easy point Find if the given...
-
Leetcod easy
Leetcode::problem(206) Reverse Linked List
Leetcode ps easy
Leetcode::Reverse Linked List Link : Leetcode::Reverse Linked List level : easy point Reverse the...
-
Leetcode medium
Leetcode::problem(1642) Furthest Building you can reach
Leetcode ps medium
Leetcode::Furthest building you can reach Link : Leetcode::furthest building you can reach level : medium <h1...
-
Leetcode easy
Leetcode::problem(1207) Unique Number of Occurrences
Leetcode ps easy
Leetcode::Unique Number of Occurences Link : Leetcode::Unique Number of Occurrences level : easy point ...
-
Leetcode easy
Leetcode::problem(13) Roman to Integer
Leetcode ps easy
Leetcode::Roman to Integer Link : Leetcode::Roman to Integer level : easy point When roman...
-
Leetcode easy
Leetcode::problem(121) Best Time to Buy and Sell stock
Leetcode ps easy
Leetcode:: Best time to buy and sell stock Link : Leetcode::best time to buy and sell stock level...
-
Leetcode medium
Leetcode::problem(692) Top K Frequent Words
Leetcode ps medium
Leetcode::Top K Frequent Words Link : Leetcode::Top K Frequent Words level : medium This problem can be simply solved...
-
Leetcode medium
Leetcode::problem(200) Number of Islands
Leetcode ps medium
Leetcode::Number of Islands Link : Leetcode::Number of Islands level : medium point Find the...
-
Leetcode medium
Leetcode::problem(2439) Minimize Maximum of Array
Leetcode ps medium
Leetcode::Minimize Maximum of Array Link : Leetcode::Minimize Maximum of Array level : medium point ...
-
Leetcode medium
Leetcode::problem(39) Combination Sum
Leetcode ps medium
Leetcode::Combination Sum Link : Leetcode::Combination Sum level : medium fail. took 70mins point Distinct integers ‘candidates’...
-
Leetcod hard
Leetcode::problem(4) Median of Two Sorted Arrays
Leetcode ps hard
Leetcode::Median of Two Sorted Arrays Link : Leetcode::Median of Two Sorted Arrays level : hard failed. Took 4 hrs...
-
Leetcode medium
Leetcode::problem(3) Longest Substring Without Repeating Characters
Leetcode ps medium
Leetcode::Longest Substring Without Repeating Characters Link : Leetcode::Longest Substring Without Repeating Characters level : medium 15 mins to solve...
-
Leetcode medium
Leetcode::problem(53) Maximum Subarray
Leetcode ps medium
Leetcode:: Maximum Subarray Link : Leetcode::Maximum Subarray level : medium point Find the maxium...
-
Leetcode medium
Leetcode::problem(560) Subarray Sum Equals K
Leetcode ps medium
Leetcode::Subarray Sum Equals K Link : Leetcode::Subarray Sum Equals K level : medium fail : algorithm 65 <h1...
-
Leetcod hard
Leetcode::problem(1372) Longest
Leetcode ps hard
Leetcode::Longe Link : Leetcode::Long level : medium point Design Big O(time) Code...
-
Leetcod hard
Leetcode::problem(1372) Longest
Leetcode ps hard
Leetcode::Longe Link : Leetcode::Long level : medium point Design Big O(time) Code...
-
Leetcode medium
Leetcode::problem(1372) Longest ZigZag Path in a Binary Tree
Leetcode ps medium
Leetcode::Longest ZigZag Path in a Binary Tree Link : Leetcode::Longest ZigZag Path in a binary tree level :...
-
codeforce div 4
COFO::Cofo Round 871
cofo round
COFO::Cofo Round #871 Link : COFO::Cofo round 871) solved : 5 solved A : 00:02 B : 00:04 C :...
-
codeforce div 2
COFO::Cofo Round 870
cofo round
COFO::Cofo Round #870 Link : COFO::Cofo round 870) solved : 0 A : 2 tried B : C : 2...
-
codeforce 1900
COFO::1818D Fish Graph
cofo problem
COFO::1818D Fish Graph Link : COFO::1818D Finding Cycle Problem level : 1900 tag : brute force, dfs...
-
codeforce div 2
COFO::Cofo Round 869
cofo round
COFO::Cofo Round #869 Link : COFO::Cofo round 869) solved : 3 A : 00:10 B : 00:51 C : 02:13...
-
codeforce div 2
COFO::Cofo Round 868
cofo round
COFO::Cofo Round #868 Link : COFO::Cofo round 868) solved : 3 A : 00:09 B : 00:38 C : 01:30...
-
codeforce div 3
COFO::Cofo Round 867
cofo round
COFO::Cofo Round #867 Link : COFO::Cofo round 867) solved : 3 A : 00:05 B : pretest passed. failed on...
-
codeforce div 2
COFO::Cofo Round 866 (Virtual)
cofo round
COFO::Cofo Round #866 Link : COFO::Cofo round 866) solved : 3 A : 00:13 B : 00:32 C : 01:27...
-
codeforce div 2
COFO::Cofo Educational Round 147
cofo round
COFO::Cofo Educational Round #147 Link : COFO::Cofo Edu round 147) solved : 3 A : 00:07 B : 00:31 C...
-
codeforce 1800
COFO::1637D Yet Another Minimization Problem
cofo problem
COFO::1637D Yet Another Minimization Problem Link : COFO::1637D Problem level : 1800 tag : dp, greedy, math TIME...
-
codeforce div 2
COFO::Cofo Round 865
cofo round
COFO::Cofo Round #865 Link : COFO::Cofo round 865) solved : 2 A : 00:24 B : 00:59 C : rank...
-
codeforce div 2
COFO::Cofo Round 864
cofo round
COFO::Cofo Round #864 Link : COFO::Cofo round 864) solved : 1 A : 00:099 B : 6 tried C :...
-
codeforce div 2
COFO::Cofo Edu Round 146
cofo round
COFO::Cofo Edu Round #146 Link : COFO::Cofo round 146) solved : A : 00:24 B : -4 C : rank...
-
codeforce div 3
COFO::Cofo Round 801
cofo round
COFO::Cofo Round #863 Link : COFO::Cofo round 863) solved : 2 A : 00:17 B : 00:35 C : tried...
-
codeforce div 2
COFO::Cofo Round 862
cofo round
COFO::Cofo Round #862 Link : COFO::Cofo round 862) solved : A : 00:21 B : 00:29 C : 01:36 rank...
-
codeforce 1600
COFO::1721D Maximum AND
cofo problem
COFO::1721D Maximum AND Link : COFO::1721D Problem level : 1800 tag : bitmasks, dfs and similar, divide and...
-
codeforce 1600
COFO::1678B2 Tokitsukaze and Good 01-String (hard version)
cofo problem
COFO::1678B2 Link : COFO::1678B2 Problem level : 1800 tag : dp, greedy, implementation TIME to understand :...
-
codeforce 1600
COFO::1728D Letter Picking
cofo problem
COFO::1728D Letter Picking Link : COFO::1728D Problem level : 1800 tag : constructive algorithms, dp, games, two pointers...
-
codeforce 1600
COFO::1729E Guess the Cycle Size
cofo problem
COFO::1729E Guess the cycle size Link : COFO::1729E Problem level : 1800 tag : interactive, probabilities TIME ...
-
codeforce 1600
COFO::1243B2 Character Swap(Hard Version)
cofo problem
COFO::1243B2 Character Swap(Hard Version) Link : COFO::1243B2 Problem level : 1600 tag : strings TIME to understand...
-
codeforce div 2
COFO::Cofo Round 858
cofo round
COFO::Cofo Round #858 Link : COFO::Cofo round 858) solved : A : 00:05 B : 00:33 C : 8 tried...
-
codeforce 1600
COFO::1284C New Year and Permutation
cofo problem
COFO::1284C New Year and Permutation Link : COFO::1284C Problem level : 1600 tag : combinatorics, math TIME ...
-
codeforce 1600
COFO::1295C Obtain the string
cofo problem
COFO::1295C Obtain the string Link : COFO::1295C Problem level : 1600 tag : dp, greedy, strings TIME ...
-
codeforce 1600
COFO::1294D MEX maximizing
cofo problem
COFO::1294D MEX maximizing Link : COFO::1294D Problem level : 1600 tag : data structures, greedy, implementation, math TIME...
-
codeforce 1600
COFO::1303C Perfect Keyboard
cofo problem
COFO::1303C Perfect Keyboard Link : COFO::1303C Problem level : 1600 tag : dfs and similar, greedy, implementation TIME...
-
codeforce 1600
COFO::1305C Kuroni and Impossible Calculation
cofo problem
COFO::1305C Kuroni and Impossible Calculation Link : COFO::1305C Problem level : 1600 tag : brute force, combinatorics, math,...
-
codeforce 1600
COFO::1337C Linova and Kingdom
cofo problem
COFO::1337C Linova and Kingdom Link : COFO::1337C Problem level : 1600 tag : dfs and similar, dp, greedy,...
-
codeforce 1600
COFO::1349A Orac and LCM
cofo problem
COFO::1349A Orac and LCM Link : COFO::1349A Problem level : 1600 tag : data structures, math, number theory...
-
codeforce 1600
COFO::1374E1 Reading Books
cofo problem
COFO::1374E1 Reading Books Link : COFO::1374E1 Problem level : 1600 tag : data structures, greedy, sortings TIME ...
-
codeforce 1600
COFO::1469C Building a Fence
cofo problem
COFO::1469C Building a Fence Link : COFO::1469C Problem level : 1600 tag : dp, greedy, implementation, two pointers...
-
codeforce div 3
COFO::Cofo Round 855
cofo round
COFO::Cofo Round #855 Link : COFO::Cofo round 855) solved : 5 A : failed B : 00:16 C1: 00:42 C2:...
-
codeforce 1600
COFO::1795D Triangle Coloring
cofo problem
COFO::1795D Triangle Coloring Link : COFO::1795D Problem level : 1600 tag : combinatroics, math TIME to understand...
-
codeforce div 2
COFO::Cofo Educational Round 144
cofo round
COFO::Cofo Edu Round #144 Link : COFO::Cofo Edu round 144) solved : 2 A : 00:08 B : 00:38 C...
-
codeforce 1600
COFO::1476C Longest Simple Cycle
cofo problem
COFO::1476C Longest Simple Cycle Link : COFO::1476C Problem level : 1600 tag : dp, graphs, greedy TIME ...
-
codeforce div 2
COFO::Cofo Round 854
cofo round
COFO::Cofo Round #854 Link : COFO::Cofo round 854) solved : 2 A : 00:22 B : 00:59 C : D1...
-
codeforce 1600
COFO::1486C1 Guessing the Greatest (easy version)
cofo problem
COFO::1486C1 Guessing the Greatest Link : COFO::1486C1 previous Problem level : 1600 tag : binary search, interactive...
-
codeforce 1600
COFO::1520F1 Guess the K-th Zero (Easy version)
cofo problem
COFO::1520F1 Guess the K-th Zero (Easy version) Link : COFO::1520F1 Problem level : 1600 tag : binary search,...
-
codeforce 1600
COFO::1498C Planar Reflections
cofo problem
COFO::1498C Planar Reflections Link : COFO::1498C Problem level : 1600 tag : brute force, data structures, dp TIME...
-
codeforce 1600
COFO::1609D Social Network
cofo problem
COFO::1609D Social Network Link : COFO::1609D Problem level : 1600 tag : dsu, graphs, greedy, implementation, trees TIME...
-
codeforce 1600
COFO::1537E1 Erase and Extend (Easy Version)
cofo problem
COFO::1537E1 Erase and Extend (Easy Version) Link : COFO::1537E1 Problem level : 1600 tag : binary search, brute...
-
codeforce 1600
COFO::1771C Hossam and Trainees
cofo problem
COFO::1771C Hossam and Trainees Link : COFO::1771C Problem level : 1600 tag : greedy, math, number theory TIME...
-
codeforce 1600
COFO::1776D Lucky Chains
cofo problem
COFO::1766D Lucky Chains Link : COFO::1766D Problem level : 1600 tag : math, number theory TIME to...
-
codeforce 1600
COFO::1658D1 388535 (Easy Version)
cofo problem
COFO::1658D1 388535 (Easy version) Link : COFO::1658D1 Problem level : 1600 tag : bitmasks, math TIME to...
-
codeforce 1600
COFO::1779C Least Prefix Sum
cofo problem
COFO::1779C Least Prefix Sum Link : COFO::1779C Problem level : 1600 tag : data structtures, greedy TIME ...
-
codeforce 1600
COFO::1778C Flexible String
cofo problem
COFO::1778C Flexible String Link : COFO::1778C Problem level : 1600 tag : TIME to understand : to...
-
codeforce 1600
COFO::1775C Interesting Sequence
cofo problem
COFO::1775C Interesting Sequence Link : COFO::1775C Problem level : 1600 tag : bit masks, math TIME to...
-
codeforce 1600
COFO::1774D Same Count One
cofo problem
COFO::1774D Same Count One Link : COFO::1774D Problem level : 1600 tag : brute force, constructive algorithms, greedy,...
-
codeforce 1600
COFO::1321C Remove Adjacent
cofo problem
COFO::1321C Remove Adjacent Link : COFO::1321C Problem level : 1600 tag : brute force, constructive algorithms, greedy, strings...
-
codeforce 1600
COFO::1342C Yet Another Counting Problem
cofo problem
COFO::1342C Yet Another Counting Problem Link : COFO::1342C Problem level : 1600 tag : math, number theory TIME...
-
codeforce 1600
COFO::1334C Circle of Monsters
cofo problem
COFO::1334C Circle of Monsters Link : COFO::1334C Problem level : 1600 tag : brute force, constructive algorithms, greedy,...
-
codeforce div 2
COFO::Cofo Round 852
cofo round
COFO::Cofo Round #852 Link : COFO::Cofo round 852) solved : 2 A : 00:20 B : 00:49 C : failed...
-
codeforce 1600
COFO::1358C Celex Update
cofo problem
COFO::1358C Celex Update Link : COFO::1358C Problem level : 1600 tag : math TIME to understand :...
-
codeforce div 2
COFO::Cofo Round 851
cofo round
COFO::Cofo Round #851 Link : COFO::Cofo round 851) solved : 1 A : 00:10 B : failed C : rank...
-
codeforce 1600
COFO::1363C Game on Leaves
cofo problem
COFO::1363C Game on Leaves Link : COFO::1363C Problem level : 1600 tag : games, trees TIME to...
-
codeforce div 2
COFO::Cofo Round 846
cofo round
COFO::Cofo Round #846 Link : COFO::Cofo round 846) solved : 2 A : 01:23 B : failed C : solved,...
-
codeforce 1600
COFO::1452D Radio Towers
cofo problem
COFO::1452D Radio Towers Link : COFO::1452D Problem level : 1600 tag : combinatorics, dp, math TIME to...
-
codeforce div 2
COFO::Cofo Edu Round 142
cofo round
COFO::Cofo Edu Round #142 Link : COFO::Cofo Edu round 142) solved : 2 A : 00:04 B : 00:44 C...
-
codeforce 1600
COFO::1373D Maximum Sum on Even Positions
cofo problem
COFO::1373D Maximum Sum on Even Positions Link : COFO::1373D Problem level : 1600 tag : divide and conquer,...
-
codeforce 1600
COFO::1389B Array Walk
cofo problem
COFO::1389B Array Walk Link : COFO::1389B Problem level : 1600 tag : brute force, dp, greedy TIME ...
-
codeforce 1600
COFO::1437D Minimal Height Tree
cofo problem
COFO::1437D Minimal Height Tree Link : COFO::1437D Problem level : 1600 tag : graphs, greedy, shortest paths, trees...
-
codeforce 1600
COFO::1458A Row GCD
cofo problem
COFO::1458A Row GCD Link : COFO::1458A LINK FOR GCD Problem level : 1600 tag : math, number...
-
codeforce 1600
COFO::1455D Sequence and Swaps
cofo problem
COFO::1455D Sequence and Swaps Link : COFO::1455D Problem level : 1600 tag : dp, greedy, sortings TIME ...
-
codeforce 1600
COFO::1461D Divide and Summarize
cofo problem
COFO::1461D Divide and Summarize Link : COFO::1461D Problem level : 1600 tag : binary search, brute force, data...
-
codeforce 1600
COFO::1475E Advertising Agency
cofo problem
COFO::1475E Advertising Agency Link : COFO::1475E Problem level : 1600 tag : combinatorics, math, sortings TIME to...
-
codeforce 1600
COFO::1482C Basic Diplomacy
cofo problem
COFO::1482C Basic Diplomacy Link : COFO::1482C Problem level : 1600 tag : brute force, constructive algorithm, greedy, implementation...
-
codeforce 1600
COFO::1607E Robot on the Board 1
cofo problem
COFO::1607E Robot on the Board1 Link : COFO::1607E Problem level : 1600 tag : implementation TIME to...
-
codeforce 1600
COFO::1566D2 Seating Arrangements (hard version)
cofo problem
COFO::1566D2 Seating Arrangements (hard version) Link : COFO::1566D2 Problem level : 1600 tag : data structrues, greedy, implementation,...
-
codeforce 1600
COFO::1612D X-Magic Pair
cofo problem
COFO::1612D X-Magic Pair Link : COFO::1612D Link : Harisam youtube Problem level : 1600 tag : math,...
-
codeforce 1600
COFO::1660E Matrix and Shifts
cofo problem
COFO::1660E Matrix and Shifts Link : COFO::1660E Problem level : 1600 tag : brute force, constructive algorithms, greedy,...
-
codeforce 1600
COFO::1615C Menorah
cofo problem
COFO::1615C Menorah Link : COFO::1615C Problem level : 1600 tag : brute force, graphs, greedy, math TIME ...
-
codeforce 1600
COFO::1665C Tree Infection
cofo problem
COFO::1665 Tree Infection Link : COFO::1665 Problem level : 1600 tag : binary search, greedy, sortings, tree TIME...
-
codeforce 1600
COFO::1671D Insert a Progression
cofo problem
COFO::1671D Insert a Progression Link : COFO::1671D Problem level : 1600 tag : brute force, constructive algorithms, greedy...
-
codeforce 1600
COFO::1677A Tokitsukaze and Strange Inequality
cofo problem
COFO::1677A Tokitsukaze and Strange Inequality Link : COFO::1677A Problem level : 1600 tag : brute force, data structures,...
-
codeforce 1600
COFO::1730B Meeting on the Line
cofo problem
COFO::1730B Meeting on the Line Link : COFO::1730B Problem level : 1600 tag : binary search, geometry, greedy,...
-
codeforce 1600
COFO::1722E Counting Rectangles
cofo problem
COFO::1722E Counting Rectangles Link : COFO::1722E Problem level : 1600 tag : brute force, data structures, dp, implementation...
-
codeforce 1600
COFO::1741E Sending a Sequence Over the Network
cofo problem
COFO::1741E Sending a Sequence Over the Network Link : COFO::1741E Problem level : 1600 tag : dp TIME...
-
codeforce div 2
COFO::Cofo Round 841
cofo round
COFO::Cofo Round #841 Link : COFO::Cofo round 841) solved : 2 A : 00:05 B : 00:56 C : fail...
-
codeforce 1600
COFO::1753B Factorial Divisibility
cofo problem
COFO::1753B Factorial Divisibility Link : COFO::1753B Problem level : 1600 tag : math, number theory TIME to...
-
codeforce 1600
COFO::1748C Zero-Sum Prefixes
cofo problem
COFO::1748C Zero-Sum Prefixes Link : COFO::1748C Problem level : 1600 tag : brute force, data structures, dp, greedy,...
-
codeforce 1600
COFO::372A Counting Kangaroos is Fun
cofo problem
COFO::372A Counting Kangaroos is Fun Link : COFO::372A Problem level : 1600 tag : binary search, greedy, sortings,...
-
codeforce 1600
COFO::371C Hamburgers
cofo problem
COFO::371C Hamburgers Link : COFO::371C Problem level : 1600 tag : binary search, brute force TIME to...
-
codeforce 1600
COFO::429B Working out
cofo problem
COFO::429B Working out Link : COFO::429B Problem level : 1600 tag : dp TIME to understand :...
-
codeforce 1600
COFO::377A Maze
cofo problem
COFO::377A Maze Link : COFO::377A Problem level : 1600 tag : dfs and similar TIME to understand...
-
codeforce 1600
COFO::431C K-tree
cofo problem
COFO::431C k-tree Link : COFO::431C Problem level : 1600 tag : dp, implementation, trees TIME to understand...
-
codeforce div 2
COFO::Cofo Round 838
cofo round
COFO::Cofo Round #838 Link : COFO::Cofo round 838) solved : A : 00:08 B : 00:35 C : failed rank...
-
codeforce 1600
COFO::446A DZY Loves Sequences
cofo problem
COFO::446A DZY Loves Sequences Link : COFO::446A Problem level : 1600 tag : dp, implementation, two pointers TIME...
-
codeforce 1600
COFO::500B New Year Permutation
cofo problem
COFO::500B New Year Permutation Link : COFO::500B Problem level : 1600 tag : dfs and similar, dsu, graphs,...
-
codeforce 1600
COFO::559A Gerald's Hexagon
cofo problem
COFO::559A Gerald’s Hexagon Link : COFO::559A Problem level : 1600 tag : brute force, geometry, math TIME ...
-
codeforce 1600
COFO::518A Vitaly and Strings
cofo problem
COFO::518A Vitaly and Strings Link : COFO::518A Problem level : 1600 tag : constructive algorithms, strings TIME ...
-
codeforce 1600
COFO::601A The Two Routes
cofo problem
COFO::601A The Two Routes Link : COFO::601A Problem level : 1600 tag : graphs, shortest paths TIME ...
-
codeforce 1600
COFO::570C Replacement
cofo problem
COFO::570C Replacement Link : COFO::570C Problem level : 1600 tag : constructive algorithms, data structures, implementation TIME ...
-
codeforce 1600
COFO::659E New Reform
cofo problem
COFO::659E New Reform Link : COFO::659E Problem level : 1600 tag : data structures, dfs and similar, dsu,...
-
codeforce 1600
COFO::660C Hard Process
cofo problem
COFO::660C Hard Process Link : COFO::660C Problem level : 1600 tag : binary search, dp, two pointers TIME...
-
codeforce 1600
COFO::678C Joty and Chocolate
cofo problem
COFO::678C Joty and Chocolate Link : COFO::678C Problem level : 1600 tag : implementation, math, number theory TIME...
-
codeforce 1600
COFO::704A Thor
cofo problem
COFO::704A Thor Link : COFO::704A Problem level : 1600 tag : brute force, data structures, implementation TIME ...
-
codeforce 1600
COFO::706C Hard problem
cofo problem
COFO::706C Hard problem Link : COFO::706C Problem level : 1600 tag : dp, strings TIME to understand...
-
codeforce 1600
COFO::722C Destroying Array
cofo problem
COFO::722C Destroying Array Link : COFO::722C Problem level : 1600 tag : data structures, dsu TIME to...
-
codeforce 1600
COFO::735D Taxes
cofo problem
COFO::735D Taxes Link : COFO::735D Link : Goldbach’s conjecture Problem level : 1600 tag : math, number...
-
codeforce div 2
COFO::Cofo Round 822
cofo round
COFO::Cofo Round #822 Link : COFO::Cofo round 822) solved : 3 A : 00:04 B : 00:23 C : 00:57...
-
codeforce 1600
COFO::1481C Fence Painting
cofo problem
COFO::1481C Fence Painting Link : COFO::1481C Problem level : 1600 tag : brute force, constructive algorithms, greedy TIME...
-
codeforce 1600
COFO::1530D Secret Santa
cofo problem
COFO::1530D Secret Santa Link : COFO::1530D Problem level : 1600 tag : constructive algorithms, flows, graphs, greedy, math...
-
codeforce 1600
COFO::1512E Permutation by Sum
cofo problem
COFO::1512E Permutation by Sum Link : COFO::1512E Problem level : 1600 tag : brute force, greedy, math TIME...
-
codeforce 1600
COFO::1288C Two Arrays
cofo problem
COFO::1288C Two Arrays Link : COFO::1288C dp reference youtubue Problem level : 1600 tag : combinatorics, dp...
-
codeforce 1600
COFO::1582D Vupsen, Pupsen and 0
cofo problem
COFO::1582D Vupsen, Pupsen and 0 Link : COFO::1582D Problem level : 1600 tag : constructive algorithms, math TIME...
-
codeforce 1600
COFO::1527C Sequence Pair Weight
cofo problem
COFO::1527C Sequence Pair Weight Link : COFO::1527C Problem level : 1600 tag : hashing, implementation, math TIME ...
-
codeforce 1600
COFO::1707A Doremy's IQ
cofo problem
COFO::1707A Doremy’s IQ Link : COFO::1707A Problem level : 1600 tag : binary search, constructive algorithms, greedy, implementation...
-
codeforce 1600
COFO::1503A Balance the Bits
cofo problem
COFO::1503A Balance the Bits Link : COFO::1503A Problem level : 1600 tag : constructive algorithms, greedy TIME ...
-
codeforce 1600
COFO::1511D Min Cost String
cofo problem
COFO::1511D Min Cost String Link : COFO::1511D Problem level : 1600 tag : brute force, constructive algorithms, graphs,...
-
codeforce 1600
COFO::1513C Add one
cofo problem
COFO::1513C Add one Link : COFO::1513C Problem level : 1600 tag : dp, matrices TIME to understand...
-
codeforce 1600
COFO::1514C Product 1 Modulo N
cofo problem
COFO::1514C Product 1 Modulo N Link : COFO::1514C Problem level : 1600 tag : greedy, number theory TIME...
-
codeforce div 2
COFO::Cofo Round 814
cofo round
COFO::Cofo Round #814 Link : COFO::Cofo round 814) solved : A : 00:14 B : 01:07 C : tried.. rank...
-
codeforce 1600
COFO::1523C Compression and Expansion
cofo problem
COFO::1532C Compression and Expansion Link : COFO::1523C Problem level : 1600 tag : brute force, data structures, greedy,...
-
codeforce 1600
COFO::1519D Maximum Sum of Products
cofo problem
COFO::1519D Maximum Sum of Products Link : COFO::1519D Problem level : 1600 tag : brute force, dp, implementation,...
-
codeforce 1600
COFO::1528A Parsa's Humongous Tree
cofo problem
COFO::1528A Parsa’s Humongous Tree Link : COFO::1528A Problem level : 1600 tag : dfs and similar, divide and...
-
codeforce 1600
COFO::1542C Strange Function
cofo problem
COFO::1542C Strange Function Link : COFO::1542C Problem level : 1600 tag : math, number theory TIME to...
-
codeforce 1600
COFO::1539D PriceFixed
cofo problem
COFO::1539D PriceFixed Link : COFO::1539D Problem level : 1600 tag : binary search, greedy, implementation, sortings, two pointers...
-
codeforce 1600
COFO::1567C Carrying Conundrum
cofo problem
COFO::1567C Carrying Conundrum Link : COFO::1567C Problem level : 1600 tag : bitmasks, combinatorics, dp, math TIME ...
-
codeforce 1600
COFO::1555D Say No to Palindromes
cofo problem
COFO::1555D Say No to Palindromes Link : COFO::1555D Problem level : 1600 tag : brute force, constructive algorithms,...
-
codeforce 1600
COFO::1593E Gardner and Tree
cofo problem
COFO::1593E Gardner and Tree Link : COFO::1593E Problem level : 1600 tag : brute force, data structures, dfs...
-
codeforce 1600
COFO::1603B Moderate Modular Mode
cofo problem
COFO::1603B Moderate Modular Mode Link : COFO::1603B Problem level : 1600 tag : constructive algorithms, math, number theory...
-
codeforce div 3
COFO::Cofo Round 811
cofo round
COFO::Cofo Round #811 Link : COFO::Cofo round 811) solved : A : 00:14 B : 00:29 C : 00:50 rank...
-
codeforce 1600
COFO::1623C Balanced Stone Heaps
cofo problem
COFO::1623C Balanced Stone Heaps Link : COFO::1623C Problem level : 1600 tag : binary search, greedy TIME ...
-
codeforce 1600
COFO::1622C Set or Decrease
cofo problem
COFO::1622C Set or Decrease Link : COFO::1622C Problem level : 1600 tag : binary search, brute force, greedy,...
-
codeforce 1600
COFO::1610C Keshi Is Throwing a Party
cofo problem
COFO::1610C Keshi Is Throwing a Party Link : COFO::1610C Problem level : 1600 tag : binary search, greedy...
-
codeforce 1600
COFO::1660D Maximum Product Strikes
cofo problem
COFO::1660D Maximum Product Strikes Link : COFO::1660D Problem level : 1600 tag : brute force, implementation, math, two...
-
codeforce 1600
COFO::1632C Strange Test
cofo problem
COFO::1632C Strange Test Link : COFO::1632C Problem level : 1600 tag : binary search, bitmasks, brute force, dp,...
-
codeforce 1600
COFO::1687A The Enchanted Forest
cofo problem
COFO::1687A The Enchanted Forest Link : COFO::1687A Problem level : 1600 tag : brute force, greedy TIME ...
-
codeforce 1600
COFO::1680C Binary String
cofo problem
COFO::1680C Binary String Link : COFO::1680C Problem level : 1600 tag : binary search, greedy, strings, two pointers...
-
codeforce 1600
COFO::780C Andryusha and Colored Balloons
cofo problem
COFO::780C Andryusha and Colored Balloons Link : COFO::780C Problem level : 1600 tag : dfs and similar, graphs,...
-
codeforce div 2
COFO::Cofo Round 810
cofo round
COFO::Cofo Round #810 Link : COFO::Cofo round 810) solved : A : 00:04 B : C : -3 rank :...
-
codeforce div 2
COFO::Cofo Edu Round 132
cofo round
COFO::Cofo Edu Round #132 Link : COFO::Cofo edu round 132) solved : A : 00:05 B : 00:22 C :...
-
codeforce 1600
COFO::788A Functions again
cofo problem
COFO::788A Functions again Link : COFO::788A Problem level : 1600 tag : dp, two pointers TIME to...
-
codeforce 1600
COFO::1251C Minimize The Integer
cofo problem
COFO::1251C Minimize The Integer Link : COFO::1251C Problem level : 1600 tag : greedy, two pointers TIME ...
-
codeforce 1600
COFO::1217B Zmei Gorynhich
cofo problem
COFO::1217B Zmei Gorynich Link : COFO::1217B Problem level : 1600 tag : greedy, math TIME to understand...
-
codeforce 1600
COFO::1633D Make Them Equal
cofo problem
COFO::1633D Make Them Equal Link : COFO::1633Dhttps://codeforces.com/problemset/problem/1633/D Problem level : 1600 tag : dp, greedy TIME to...
-
codeforce div 4
COFO::Cofo Round 806
cofo round
COFO::Cofo Round #806 Link : COFO::Cofo round 806) solved : A : 00:02 B : 00:05 C : 00:10 D...
-
codeforce div 3
COFO::Cofo Round 805
cofo round
COFO::Cofo Round #805 Link : COFO::Cofo round 805) solved : A : 00:03 B : 00:14 C : 00:26 D...
-
codeforce 1600
COFO::1689C Infected Tree
cofo problem
COFO::1689C Infected Tree Link : COFO::1689C Problem level : 1600 tag : dfs and similar, dp, trees TIME...
-
div 2
COFO:: Round 804
cofo round
COFO:: Round #804 Link : COFO::round 804) solved : A : 00:13 B : 00:27 C : rank : 4937...
-
div 2
COFO::Cofo Round 803
cofo round
COFO::COFO Round #803 Link : COFO::round 803) solved : A : 00:14 B : 00:31 rank : 7420 score :...
-
Leetcode ps Easy
Leetcode::problem Two Sum
Leetcode ps Easy
Leetcode::Two Sum Link : Leetcode::Two Sum) level : tag : point Design Big O(time) <h1...
-
codeforce div 2
COFO::Cofo Round 801
cofo round
COFO::Cofo Round #801 Link : COFO::Cofo round 801) solved : A : B : C : rank : score :...
-
codeforce div all
COFO::Global Round 21
cofo round
COFO::Global Round #21 Link : COFO::Global round 21) solved : A : 00:10 B : 00:32 C : pretest passed....
-
codeforce 1400
COFO::1351C Skier
cofo problem
COFO::1351C Skier Link : COFO::1351C Problem level : 1400 tag : data structures, implementation TIME to understand...
-
codeforce 1500
COFO::1338A Powered Addition
cofo problem
COFO::1338A Powered Addition Link : COFO::1338A Problem level : 1500 tag : greedy, math TIME to understand...
-
codeforce 1400
COFO::1320A Journey Planning
cofo problem
COFO::1320A Journey Planning Link : COFO::1320A Problem level : 1400 tag : data structures, dp, greedy, math, sortings...
-
codeforce 1400
COFO::1316B String Modification
cofo problem
COFO::1316B String Modification Link : COFO::1316B Problem level : 1400 tag : brute force, constructive algorithms, implementation, sortings,...
-
codeforce 1500
COFO::1304C Air Conditioner
cofo problem
COFO::1304C Air Conditioner Link : COFO::1304C Problem level : 1500 tag : dp, greedy, implementation, sortings, two pointers...
-
codeforce 1400
COFO::1330B Dreamoon Likes Permutations
cofo problem
COFO::1330B Dreamoon Likes Permutations Link : COFO::1330B Problem level : 1400 tag : implementation, math TIME to...
-
codeforce 1300
COFO::1322A Unusual Competitions
cofo problem
COFO::1322A Unusual Competitions Link : COFO::1322A Problem level : 1300 tag : greedy TIME to understand :...
-
codeforce 1400
COFO::1324D Pair of Topics
cofo problem
COFO::1324D Pair of Topics Link : COFO::1324D Problem level : 1400 tag : binary search, data structures, sortings,...
-
codeforce div 2
COFO::Round 791
cofo round
COFO::Round #791 Link : COFO::791 (div 2) solved : A : ( 00:28 ) B : ( 00:42 ) C...
-
codeforce 1500
COFO::1272D Remove One Element
cofo problem
COFO::1272D Remove One Element Link : COFO::1272D Problem level : 1500 tag : brute force, dp TIME ...
-
codeforce 1400
COFO::1189C Candies!
cofo problem
COFO::1189C Candies! Link : COFO::1189C Problem level : 1400 tag : data structures, dp, implementation, math TIME ...
-
codeforce 1500
COFO::1278B A and B
cofo problem
COFO::1278B A and B Link : COFO::1278B Problem level : 1500 tag : greedy, math TIME to...
-
codeforce 1300
COFO::1307B Cow and Friend
cofo problem
COFO::1307B Cow and Friend Link : COFO::1307B Problem level : 1300 tag : geometry, greedy, math TIME ...
-
codeforce 1500
COFO::1256D Binary String Minimizing
cofo problem
COFO::1256D Binary String Minimizing Link : COFO::1256D Problem level : 1500 tag : greedy TIME to understand...
-
codeforce 1500
COFO::1250L Divide The Students
cofo problem
COFO::1250L Divide The Students Link : COFO::1250L Problem level : 1500 tag : binary search, greedy, math TIME...
-
codeforce 1500
COFO::1299A Anu Has a Function
cofo problem
COFO::1299A Anu Has a Function Link : COFO::1299A Problem level : 1500 tag : brute force, greedy, math...
-
codeforce 1500
COFO::1296D Fight with Monsters
cofo problem
COFO::1296D Fight with Monsters Link : COFO::1296D Problem level : 1500 tag : greedy, sortings TIME to...
-
codeforce 1500
COFO::1296C Yet Another Walking Robot
cofo problem
COFO::1296C Yet Another Walking Robot Link : COFO::1296C Problem level : 1500 tag : data structures, implementation TIME...
-
codeforce 1500
COFO::1283C Friends and Gifts
cofo problem
COFO::1283C Friends and Gifts Link : COFO::1283C Problem level : 1500 tag : constructive algorithms, data structures, math...
-
codeforce 1500
COFO::1301B Motarack's Birtyhday
cofo problem
COFO::1301B Motarack’s Birthday Link : COFO::1301B Problem level : 1500 tag : binary search, greedy, ternary search TIME...
-
codeforce 1500
COFO::1307C Cow and Message
cofo problem
COFO::1307C Cow and Message Link : COFO::1307C Problem level : 1500 tag : brute force, dp, math, strings...
-
codeforce 1400
COFO::1183C Computer Game
cofo problem
COFO::1183C Computer Game Link : COFO::1183C Problem level : 1400 tag : binary search, math TIME to...
-
codeforce 1400
COFO::1167C News Distribution
cofo problem
COFO::1167C News Distribution Link : COFO::1167C Problem level : 1400 tag : dfs and similar, dsu, graph TIME...
-
codeforce 1300
COFO::1203C Common Divisors
cofo problem
COFO::1203C Common Divisors Link : COFO::1203C Problem level : 1300 tag : implementation, math TIME to understand...
-
codeforce 1300
COFO::1178B WOW Factor
cofo problem
COFO::1178B WOW Factor Link : COFO::1178B Problem level : 1300 tag : dp, strings TIME to understand...
-
codeforce 1300
COFO::1176C Lose it!
cofo problem
COFO::1176C Lose it Link : COFO::1176C Problem level : 1300 tag : dp, greedy, implementation TIME to...
-
codeforce 1300
COFO::1174C Ehab and Special Coloring Problem
cofo problem
COFO::1174C Ehab and Special Coloring Problem Link : COFO::1174C Problem level : 1300 tag : constructive algorithms, number...
-
codeforce 1300
COFO::1236C Labs
cofo problem
COFO::1236C Labs Link : COFO::1236C Problem level : 1300 tag : constructive algorithms, greedy, implementation TIME to...
-
codeforce 1400
COFO::1195C Basketball Exercise
cofo problem
COFO::1195C Basketball Exercise Link : COFO::1195C Problem level : 1400 tag : dp TIME to understand :...
-
codeforce 1400
COFO::1190A Tokitsukaze and Discard Items
cofo problem
COFO::1190A Tokitsukaze and Discard Items Link : COFO::1190A Problem level : 1400 tag : implementation, two pointers TIME...
-
codeforce 1300
COFO::1194C From S To T
cofo problem
COFO::1194C From S To T Link : COFO::1194C Problem level : 1300 tag : implementation, strings TIME ...
-
codeforce 1300
COFO::1311C Perform the Combo
cofo problem
COFO::1311C Perform the Combo Link : COFO::1311C Problem level : 1300 tag : brute force TIME to...
-
codeforce 1400
COFO::1197C Array Splitting
cofo problem
COFO::1197C Array Splitting Link : COFO::1197C Problem level : 1400 tag : greedy, sortings TIME to understand...
-
codeforce 1400
COFO::1214A Optimal Currency Exchange
cofo problem
COFO::1214A Optimal Currency Exchange Link : COFO::1214A Problem level : 1400 tag : brute force, math TIME ...
-
codeforce 1300
COFO::1209B Koala and Lights
cofo problem
COFO::1209B Koala and Lights Link : COFO::1209B Problem level : 1300 tag : implementation, math, number theory TIME...
-
codeforce 1400
COFO::1201C Maximum Median
cofo problem
COFO::1201C Maximum Median Link : COFO::1201C Problem level : 1400 tag : binary search, greedy, math, sortings TIME...
-
codeforce 1400
COFO::1200C Round Corridor
cofo problem
COFO::1200C Round Corridor Link : COFO::1200C Problem level : 1400 tag : math, number theory TIME to...
-
codeforce 1400
COFO::1215B The Number of Products
cofo problem
COFO::1215B The number of products Link : COFO::1215B Problem level : 1400 tag : combinatorics, dp, implementation TIME...
-
codeforce 1400
COFO::1228B Filling the Grid
cofo problem
COFO::1228B Filling the Grid Link : COFO::1228B Problem level : 1400 tag : math, implementation TIME to...
-
codeforce 1300
COFO::1220B Multiplication Table
cofo problem
COFO::1220B Multiplication Table Link : COFO::1220B Problem level : 1300 tag : math, number theory TIME to...
-
codeforce 1300
COFO::1234B2 Social Network
cofo problem
COFO::1234B2 Social Network Link : COFO::1234B2 Problem level : 1300 tag : data structures, implementation TIME to...
-
codeforce 1400
COFO::1251B Binary Palindromes
cofo problem
COFO::1251B Binary Palindromes Link : COFO::1251B Problem level : 1400 tag : greedy, strings TIME to understand...
-
codeforce 1400
COFO::1250A Berstagram
cofo problem
COFO::1250A Berstagram Link : COFO::1250A Problem level : 1400 tag : implementation TIME to understand : 8...
-
codeforce 1400
COFO::1245C Constanze's Machine
cofo problem
COFO::1245C Constanze’s Machine Link : COFO::1245C Problem level : 1400 tag : dp TIME to understand :...
-
codeforce 1300
COFO::1238B Kill 'Em All
cofo problem
COFO::1238B Kill ‘Em all Link : COFO:1238B Problem level : 1300 tag : greedy, sortings TIME to...
-
codeforce 1300
COFO::1237B Balanced Tunnel
cofo problem
COFO::1237B Balanced Tunnel Link : COFO::1237B Problem level : 1300 tag : data structures, sortings, two pointers TIME...
-
codeforce 1400
COFO::1279C Stack of Presents
cofo problem
COFO::1279C Stack of Presents Link : COFO::1279C Problem level : 1400 tag : data structures, implementation TIME ...
-
codeforce 1400
COFO::1270C Make Good
cofo problem
COFO::1270C Make Good Link : COFO::1270C Problem level : 1400 tag : bitmasks, constructive algorithms, math TIME ...
-
codeforce 1300
COFO::1303B National Project
cofo problem
COFO::1303B National Projects Link : COFO::1303B Problem level : 1300 tag : math TIME to understand :...
-
codeforce 1300
COFO::1260B Obtain Two Zeros
cofo problem
COFO::1260B Obtain Two zeros Link : COFO::1260B Problem level : 1300 tag : binary search, math TIME ...
-
codeforce 1400
COFO::1256B Minimize the Permutation
cofo problem
COFO::1256B Minimize the Permutation Link : COFO::1256B Problem level : 1400 tag : greedy TIME to understand...
-
codeforce 1300
COFO::1285B Just Eat It!
cofo problem
COFO::1285B Just Eat It! Link : COFO::1285B Problem level : 1300 tag : dp, greedy, implementation TIME ...
-
codeforce 1400
COFO::1284B New Year and Ascent Sequence
cofo problem
COFO::1284B New Year and Ascent Sequence Link : COFO::1284B Problem level : 1400 tag : binary search, combinatorics,...
-
codeforce 1300
COFO::1279B Verse For Santa
cofo problem
COFO::1279B Verse For Santa Link : COFO::1279B Problem level : 1300 tag : binary search, brute force, implementation...
-
codeforce 1300
COFO::1291B Array Sharpening
cofo problem
COFO::1291B Array Sharpening Link : COFO::1291B Problem level : 1300 tag : greedy, implementation TIME to understand...
-
codeforce 1300
COFO::1294C Product of Three Numbers
cofo problem
COFO::1294C Product of Three Numbers Link : COFO::1294C Problem level : 1300 tag : greedy, math, number theory...
-
codeforce 1400
COFO::1285C Fadi and LCM
cofo problem
COFO::1285C Fadi and LCM Link : COFO::1285C Problem level : 1400 tag : brute force, math, number theory...
-
codeforce 1300
COFO::1373C Pluses and Minuses
cofo problem
COFO::1373C Pluses and Minuses Link : COFO::1373C Problem level : 1300 tag : math TIME to understand...
-
codeforce 1400
COFO::1292A NEKO's Maze Game
cofo problem
COFO::1292A NEKO’s Maze Game Link : COFO::1292A Problem level : 1400 tag : data structures, dsu, implementation TIME...
-
codeforce 1400
COFO::1468C Berpizza
cofo problem
COFO::1468C Berpizza Link : COFO::1468C Problem level : 1400 tag : data structures, implementation TIME to understand...
-
codeforce 1300
COFO::1446A Knapsack
cofo problem
COFO::1446A Knapsack Link : COFO::1446A Problem level : 1300 tag : constructive algorithms, greedy, sortings TIME to...
-
codeforce 1500
COFO::1473C No more inversions
cofo problem
COFO::1473C No more inversions Link : COFO::1473C Problem level : 1500 tag : constructive algorithms TIME to...
-
codeforce 1400
COFO::1475C Ball in Berland
cofo problem
COFO::1475C Ball in Berland Link : COFO::1475C Problem level : 1400 tag : graphs, math, combinatorics TIME ...
-
codeforce 1300
COFO::1470A Strange Birthday Party
cofo problem
COFO::1470A Strange Birthday Party Link : COFO::1470A Problem level : 1300 tag : binary search, dp, greedy, sortings,...
-
codeforce 1500
COFO::1389C Good String
cofo problem
COFO::1389C Good String Link : COFO::1389C Problem level : 1500 tag : brute force, dp, greedy, two pointers...
-
codeforce 1400
COFO::1408B Arrays Sum
cofo problem
COFO::1408B Arrays Sum Link : COFO::1408B Problem level : 1400 tag : constructive algorithms, greedy, math TIME ...
-
codeforce 1400
COFO::1451C String Equality
cofo problem
COFO::1451C String Equality Link : COFO::1451C Problem level : 1400 tag : dp, greedy, hashing, implementation, strings TIME...
-
codeforce 1400
COFO::1453B Suffix Operations
cofo problem
COFO::1453B Suffic Operation Link : COFO::1453B Problem level : 1400 tag : constructive algorithms, implementation TIME to...
-
codeforce 1300
COFO::1454D Number into Sequence
cofo problem
COFO::1454D Number into Sequence Link : COFO::1454D Problem level : 1300 tag : constructive algorithms, math, number theory...
-
codeforce 1400
COFO::1461B Find the Spruce
cofo problem
COFO::1461B Find the Spruce Link : COFO::1461B Problem level : 1400 tag : brute force, dp, implementation TIME...
-
codeforce 1400
COFO::1452B Toy Blocks
cofo problem
COFO::1452B Toy Blocks Link : COFO::1452B Problem level : 1400 tag : binary search, greedy, math, sortings TIME...
-
codeforce 1300
COFO::1459B Move and Turn
cofo problem
COFO::1459B Move and Turn Link : COFO::1459B Problem level : 1300 tag : dp, math TIME to...
-
codeforce 1400
COFO::1462D Add to Neighbour and Remove
cofo problem
COFO::1462D Add to Neighbour and Remove Link : COFO::1462D Problem level : 1400 tag : greedy, math, number...
-
codeforce 1300
COFO::1466C Canine poetry
cofo problem
COFO::1466C Canine poetry Link : COFO::1466C Problem level : 1300 tag : dp, greedy, strings TIME u...
-
codeforce 1400
COFO::1463B FInd the Array
cofo problem
COFO::1463B Find the Array Link : COFO::1463B Problem level : 1400 tag : bitmasks, constructive algorithms, greedy time...
-
codeforce 1500
COFO::1461C Random Events
cofo problem
COFO::1461C Random Events Link : COFO::1461C 이해하는데 20분정도 소요되었고, 푸는데 1시간 40분 걸렸으니 총 2시간 소요했습니다. Problem level...
-
codeforce 1800
COFO::1466E Apollo versus Pan
cofo problem
COFO::1466E Apollo versus Pan Link : COFO::1466E 정말 어려웠던 수학문제입니다. 결국 editorial을 참고했지만, edit을 이해하는 것만으로도 추후에 큰 도움이 될 것...
-
codeforce 1700
COFO::1467B Hills And Valleys
cofo problem
COFO::1467B Hills Link : COFO:: Problem level : tag : TIME to understand : to algorithm :...
-
codeforce 1700
COFO::1467B Hills And Valleys
cofo problem
COFO::1467B Hills And Valleys Link : COFO::1467B Problem level : 1700 tag : implementation, brute force 결국 쉽게...
-
codeforce 1400
COFO::1363B Subsequence Hate
cofo problem
COFO::1363B Subsequence Hate Link : COFO::1363B Problem level : 1400 tag : implementation, strings 연속된 0과 1을 압축시키는...
-
codeforce 1400
COFO::1374D Zero Remainder Array
cofo problem
COFO::1374D Zero Remainder Array Link : COFO::1374D 깔끔하게 풀었지만, 아직 1400점대는 시간이 좀 오래걸립니다. 아이디어가 떠오르기까지 걸리는 시간이 줄어들어야 빠르게 풀...
-
codeforce 1400
COFO::1375C Element Extermination
cofo problem
COFO::1375C Element Extermination Link : COFO::1375C Problem level : 1400 tag : constructive algorithms, data structures, greedy 고민을...
-
codeforce 1400
COFO::1415C Bouncing Ball
cofo problem
COFO::1415C Bouncing Ball Link : COFO::1415C Problem level : 1400 tag : brute force, dp, implementation 아이디어가 어렴풋이...
-
codeforce 900
COFO::1380A Three Indices
cofo problem
COFO::1380A Three Indices Link : COFO::1380A Problem level : 900 tag : brute force, data structures 1년전에 제출시...
-
codeforce 1400
COFO::1308B Universal Solution
cofo problem
COFO::1308B Universal Solution Link : COFO::1308B Problem level : 1400 tag : greedy Point 주먹가위보...
-
codeforce 1400
COFO::1421C Palindromifier
cofo problem
COFO::1421C Palindromifier Link : COFO::1421C Problem level : 1400 tag : strings, constructive algorithms Point ...
-
codeforce 1300
COFO::1422B Nice Matrix
cofo problem
COFO::1422B Nice Matrix Link : COFO::1422B Problem level : 1300 tag : greedy, implementation, math 재밌는 문제이고 예외처리가...
-
codeforce 1300
COFO::1424G Years
cofo problem
COFO::1424G Years Link : COFO::1424G Problem A level : 1300 tag : data structures, sortings Point...
-
codeforce 1400
COFO::1425A Arena of Greed
cofo problem
COFO::1425A Arena of Greed Link : COFO::1425A Problem level : 1400 tag : games, greedy Point...
-
codeforce 1400
COFO::1425F Flamingoes of Mystery
cofo problem
COFO::1425F Flamingoes of Mystery Link : COFO::1425F Problem level : 1400 tag : interactive Point ...
-
codeforce 1100
COFO::1426C Increase and Copy
cofo problem
COFO::1426C Increase and Copy Link : COFO::1426C Problem level : 1100 tag : binary search, constructive algorithms, math...
-
codeforce 1400
COFO::1427B Chess Cheater
cofo problem
COFO::1427B Chess Cheater Link : COFO::1427B Problem level : 1400 tag : greedy, implementation, sortings 제가 문제를 풀때,...
-
codeforce 1300
COFO::1425H Huge Boxes of Animal Toys
cofo problem
COFO::1425H Huge Boxes of Animal Toys Link : COFO::1425H Problem level : 1300 tag : constructive algorithms 어떻게...
-
codeforce 1400
COFO::1431B Polycarp and the Language of Gods
cofo problem
COFO::1431B Polycarp and the Language of Gods Link : COFO::1431B Problem A level : 1400 tag : special...
-
codeforce 1200
COFO::1428B Belted Rooms
cofo problem
COFO::1428B Belted Rooms Link : COFO::1428B Problem B level : 1200 tag : graphs, implementation 제가 B번 문제에...
-
codeforce 1300
COFO::1433E Two Round Dances
cofo problem
COFO::1433E Two Round Dances Link : COFO::1433E Problem A level : 1300 tag : combinatorics, math <h3...
-
codeforce 1200
COFO::1437B Reverse Binary Strings
cofo problem
COFO::1437B Reverse Binary Strings Link : COFO::1437B Problem B level : 1200 tag : constructive algorithms, greedy editorial을...
-
codeforce 1300
COFO::1443B Saving the City
cofo problem
COFO::1443B Saving the City Link : COFO::1443B Problem A level : 1300 tag : dp, greedy, math, sortings...
-
codeforce 1400
COFO::1443C The Delivery Dilemma
cofo problem
COFO::1443C The Delivery Dilemma Link : COFO::1443C Problem A level : 1400 tag : binary search, greedy, sortings...
-
codeforce div 2
COFO::Round 700
cofo round
COFO::Round #700 Link : COFO::700 (div 2) solved : A : ( 00:04 ) B : ( 01:52 ) rank...
-
codeforce div 2
COFO::Round 723
cofo round
COFO::Round #723 Link : COFO::round 723(div 2) [chicken mcnugget theroem] (https://suuntree.tistory.com/82) solved : rank : 12348 score : 0 A부터...
-
codeforce div 2
COFO::Round 721
cofo round
COFO::Round #721 Link : COFO::round 721(div2) solved : A : ( 00:08 ) rank : 8498 score : 484 ...
-
codeforce div 2
COFO::Round 708
cofo round
COFO::Round #708 ( div 2 ) Link : COFO::round 708 ( div 2) solved : A : ( 00:08 )...
-
codeforce div 2
COFO::Round 707
cofo round
COFO::Round #707 Link : COFO::round 707 (div 2) solved : A : ( 01:00 ) B : ( 01:31 )...
-
codeforce div 2
COFO::Round 706
cofo round
COFO::Round #706 ( div 2 ) Link : COFO::round 706 (div 2) solved : A : ( 01:53 ) B...
-
codeforce div 2
COFO::Round 703
cofo round
COFO::Round #703 Link : COFO::round 703 solved : A : ( 00:21 ) rank : 9926 score : 308 ...
-
codeforce div 2
COFO::Round 704
cofo round
COFO::Round #704 (div 2) Link : COFO::round 704(div2) solved : A : ( 00:29 ) B : ( 01:17 )...
-
codeforce div 2
COFO::Round 672
cofo round
COFO::Round #672 Link : COFO::round 672 ( div 2 ) solved : B : ( 00:46 ) C1 : (...
-
TEST
2021.02.06 swea pro
pro
시험 이글은 같은 실수를 반복하지 않기 위해, 실수를 복기하는 차원에서 작성하였습니다. 비슷한 문제 패인 결과 PASS ...
-
TEST
2021.01.23 swea pro
pro
시험 이글은 같은 실수를 반복하지 않기 위해, 실수를 복기하는 차원에서 작성하였습니다. 비슷한 문제 패인 결과 Fail ...
-
TEST
2021.01.16 swea pro
pro
시험 이글은 같은 실수를 반복하지 않기 위해, 실수를 복기하는 차원에서 작성하였습니다. 비슷한 문제 패인 결과 Fail ...
-
TEST
2021.01.09 swea pro
pro
시험 이글은 같은 실수를 반복하지 않기 위해, 실수를 복기하는 차원에서 작성하였습니다. 비슷한 문제 패인 결과 Fail ...
-
professional
Pro::Parametric Search
professional algorithm
Parametric Search 파라메트릭 서치란, 최적화 문제(문제의 상황을 만족하는 특정 변수의 최솟값, 최댓값을 구하는 문제)를 결정 문제로 바꾸어 푸는 것 ...
-
professional
Pro::Convex Hull
professional algorithm
Convex Hull (볼록 껍질) 정의 영어로 보면 매우 생소한 단어이지만, 한국말로 보면 뜻을 알 수 있습니다. 볼록 껍질은 집합으로 주어진 점이나 영역을...
-
professional
Pro::Rabin-Karp + Rolling Hash
professional algorithm
Rabin-Karp 도입 라빈카프 알고리즘은 긴 문자열을 해싱하는 대표적인 알고리즘입니다. 긴 문자열 S가 주어지고 이 중 pattern P를 찾을때 매우 유용합니다. KMP알고리즘의...
-
professional
Pro::LCS
professional algorithm
LCS 정의 LCS(Longest Common Subsequence) 최장 공통 부분 문자열입니다. Substring과 Subsequence의 차이는 알아두어야 코드포스에서 문제풀때 헷갈리지 않습니다. <h1...
-
professional
Pro::KMP
professional algorithm
KMP 정의 Knuth, Morris, Prett 알고리즘이라고 합니다. 텍스트의 길이 N, 패턴의 길이 M이라고 할때, 텍스트에 해당 패턴이 몇개나 존재하는지 찾는 알고리즘입니다....
-
professional
Pro::vector
professional algorithm
Vector 정의 박트리님의 블로그를 참고하였습니다. #include <bits/stdc++.h> using namespace std;...
-
professional
Pro::Lesson's learned
professional algorithm
수학적 개념 No. 설명 링크 1 fastpow(x, y) : x^y꼴을 빠르게 구할 수 있게 해줍니다. <a...
-
professional
Pro::Stack
professional algorithm
Stack 박트리님의 블로그를 참고하였습니다. #include <bits/stdc++.h> using namespace std; <span...
-
professional
Pro::sort, pair
professional algorithm
Sort 및 pair 정의 sort 박트리님의 블로그를 참고하였습니다. #include <stdio.h> #include <iostream><span...
-
professional
Pro::set
professional algorithm
Set 정의 박트리님의 블로그를 참고하였습니다. #include <bits/stdc++.h> using namespace std;...
-
professional
Pro::section press
professional algorithm
좌표압축 좌표 압축이란, 문제에서 제시되는 좌표의 범위보다 입력의 갯수가 적을때 사용하는 기법입니다. ex) -2^30 <= x, y <= 2^30 이고 x,y는...
-
professional
Pro::queue
professional algorithm
Queue 정의 박트리님의 블로그를 참고하였습니다. #include <bits/stdc++.h> using namespace std;...
-
professional
Pro::map
professional algorithm
map 정의 박트리님의 블로그를 참고하였습니다 #include <iostream> template <class <span...
-
professional
Pro::lower bound
professional algorithm
lower_bound 정의 lower_bound(arr, arr+n, key); 주어진 배열 범위 (arr[0] ~ arr[0+n]) 내에 찾으려는 key값이 없으면 key값 이상인 가장 작은 정수에 해당하는...
-
professional
Pro::LinkedList
professional algorithm
LinkedList 정의 ## Chaining Hash ( with Linked List ) - B형의 경우 문제설명에 최대로 필요한 리스트의 길이가...
-
professional
Pro::find
professional algorithm
find 주어진 범위 내에서 val에 해당하는 값의 Iterator를 리턴합니다. template <typename It,...
-
professional
Pro::Professional ( 목차 )
professional algorithm
BackGround 자료구조 Ch Description Done 1.1 Hashing https://beenpow.github.io/sweab/2019/12/18/swea-B-hash-1/ 1.2 Linked List <a...
-
BOJ
BOJ::1786 찾기
BOJ Gold 1
BOJ::1786 찾기 Link : BOJ::1786 bowbowbow : KMP Level : Gold 1 tag : KMP, string 시사점 ...
-
BOJ
BOJ::9251 LCS
BOJ Gold 5
BOJ::9251 LCS Link : BOJ::9251 Level : Gold 5 tag : dynamic programming, string, LCS Crocus : LCS <h1...
-
BOJ
BOJ::1793 타일링
BOJ Silver 1
BOJ::1793 타일링 Link : BOJ::1793 Level : Silver1 tag : dynamic programming, large number 시사점 자릿수가 30자리는 충분히...
-
codeforce div 2
COFO::Round 633
cofo round
COFO::Round #633 ( div 2 ) Link : COFO::round 633 ( div 2 ) solved : A : ( 01:06...
-
codeforce div 2
COFO::Round 677
cofo round
COFO::Round #677 ( div 3 ) Link : COFO::round 677 ( div 3 ) solved : A : ( 00:14...
-
codeforce 1700
COFO::1260C Infinite Fence
cofo problem
COFO::1260C Infinite Fence Link : COFO::Educational round 77 ( div 2 ) Problem C level : 1700 tag...
-
codeforce 1700
COFO::1359C Mixing Water
cofo problem
COFO::1359C Mixing Water Link : COFO::Educational round 88 ( div 2 ) Problem C : Mixing Water level...
-
codeforce 1800
COFO::1138B Circus
cofo problem
COFO::1138B Circus Link : COFO::round 545 ( div 2 ) rhs0266님과 Green 님이 도와주셨습니다. 난이도 1800 수준의 수학문제는 제게 아직 어려운것...
-
BOJ
BOJ::10504 덧셈
BOJ Gold 3
BOJ::10504 덧셈 Link : BOJ::10504 Link : 참고한 사이트 Level : Gold 3 tag : math 시사점 ...
-
codeforce 1700
COFO::1141E Superhero Battle
cofo problem
COFO::1141E Superhero Battle Link : COFO::cofo round 547 ( div 3 ) Problem E : Superhero Battle level...
-
codeforce 1800
COFO::1152C - Neko does Maths
cofo problem
COFO::1152C - Neko does Maths Link : COFO::round 554(div 2) Problem C level : 1800 tag : brute...
-
codeforce div 2
COFO::Round 671
cofo round
COFO::Round #671 ( div 2 ) Link : COFO::round 671 (div 2) solved : A : ( 00:18 ) B...
-
codeforce 1800
COFO::1250B The Feast and the Bus
cofo problem
COFO::1250B The Feast and the Bus Link : COFO::NERC 2019-2020 Link : one of solutions::programmersought.com Problem B :...
-
codeforce div 2
COFO::Round edu 95
cofo round
COFO::Educational Round #95 ( div 2 ) Link : COFO::round 95 (div 2) solved : A : ( 00:23 )...
-
codeforce 1700
COFO::1295B Infinite Prefixes
cofo problem
COFO::1295B Infinite Prefixes Link : COFO::educational round 81 Problem B : Infinite Prefixes level : 1700 tag :...
-
codeforce 1700
COFO::1228C Primes and Multiplication
cofo problem
COFO::1228C Primes and Multiplication Link : COFO::round 589 ( div 2 ) Problem C : Primes and Muliplication ...
-
codeforce 1700
COFO::1037D Valid BFS?
cofo problem
COFO::1037D Valid BFS? Link : COFO::Manthan, codefest 18 Problem D : Valid BFS? level : 1700 tag :...
-
codeforce 1700
COFO::486C Palindrome Transformation
cofo problem
COFO::486C Palindrome Transformation Link : COFO::round 227 (div 2) Problem C level : 1700 tag : brute force,...
-
codeforce 1700
COFO::339D Xenia and Bit Operations
cofo problem
COFO::339D Xenia and Bit Operations Link : COFO::round 197(div 2) Problem D level : 1700 tag : data...
-
codeforce 1700
COFO::977F Consecutive Subsequence
cofo problem
COFO::977F Consecutive Subsequence Link : COFO::round #479 div 3 F Problem F level : 1700 tag : dp...
-
codeforce 1700
COFO::466C Number of ways
cofo problem
COFO::466C Number of ways Link : COFO::round 266 (div 2) Problem C level : 1700 tag : binary...
-
codeforce div 2
COFO::Round 669
cofo round
COFO::Round #669 ( div 2 ) Link : COFO::round 669 ( div 2 ) solved : A : ( 01:41...
-
codeforce div 2
COFO::Round 648
cofo round
COFO::Round #648 ( div 2 ) Link : COFO::round 648 ( div 2 ) solved : A : ( 00:22...
-
codeforce div 2
COFO::Round 668
cofo round
COFO::Round #668 ( div 2 ) Link : COFO::round 668(div 2) solved : B : ( 00:37 ) rank :...
-
codeforce 1700
COFO::559B Equivalent Strings
cofo problem
COFO::559B Equivalent Strings Link : COFO::559B Problem B level : 1700 tag : divide and conquer, hashing, sortings,...
-
codeforce div 2
COFO::Round 655
cofo round
COFO::Round #655 ( div 2 ) Link : COFO::round 655 ( div 2 ) solved : A : ( 00:05...
-
codeforce div 2
COFO::Round 657
cofo round
COFO::Round #657 ( div 2 ) Link : COFO::round 657 (div 2) solved : B : ( 01:50 ) rank...
-
codeforce div 2
COFO::Round 659
cofo round
COFO::Round #659 ( div 2 ) Link : COFO::round 659 ( div 2 ) solved : A : ( 00:10...
-
codeforce div 2
COFO::Round 666
cofo round
COFO::Round #666 ( div 2 ) Link : COFO::round 666 ( div 2 ) solved : A : ( 00:06...
-
codeforce div 2
COFO::Round 660
cofo round
COFO::Round 660 ( div 2 ) Link : COFO::round 660 ( div 2 ) solved : A : ( 00:21...
-
usaco
USACO SILVER::2019 US Open - Fence Planning
USACO SILVER
USACO SILVER::2019 US Open - Fence Planning Link : USACO BOJ::17197 Link : USACO contest::2019 US Open 유사코 실버 ...
-
usaco
USACO SILVER::2019 US Open - Cow Steeplechase 2
USACO SILVER
USACO SILVER::2019 US Open - Cow Steeplechase 2 Link : USACO BOJ::17196 Link : USACO contest::2019 US Open 유사코 실버...
-
usaco
USACO SILVER::2019 US Open - Left Out
USACO SILVER
USACO SILVER::2019 US Open - Left Out Link : USACO BOJ::17195 Link : USACO contest::2019 US Open 유사코 실버 ...
-
codeforce div 2
COFO::Round edu 94
cofo round
COFO::Educational Round 94 ( div 2 ) Link : COFO::educational round 94 solved : A : ( 00:11 ) rank...
-
codeforce div 2
COFO::Round 665
cofo round
COFO::Round #665 ( div 2 ) Link : COFO::round 665(div 2) solved : B : ( 00:49 ) C :...
-
codeforce div 2
COFO::Round 663
cofo round
COFO::Round #663 ( div 2 ) Link : COFO::round 663 solved : A : ( 00:10 ) B : (...
-
usaco
USACO SILVER::2019 January - Mountain View
USACO SILVER
USACO SILVER::2019 January - Mountain View Link : USACO BOJ::17026 Link : USACO contest::2019 January 유사코 실버 Mountain...
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usaco
USACO SILVER::2019 January - Icy Perimeter
USACO SILVER
USACO SILVER::2019 January - Icy Perimeter Link : USACO BOJ::17025 Link : USACO contest::2019 January 유사코 실버 Icy...
-
usaco
USACO SILVER::2019 January - Grass Planting
USACO SILVER
USACO SILVER::2019 January - Grass Planting Link : USACO BOJ::17024 Link : USACO contest::2019 January 유사코 실버 Grass...
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codeforce div 2
COFO::Round 662
cofo round
COFO::Round #662 ( div 2 ) Link : COFO::round 662 ( div 2 ) solved : A : ( 00:08...
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codeforce div 2
COFO::Round edu 93
cofo round
COFO::Educational Round 93 ( div 2 ) Link : COFO::Educational Round 93 ( div 2 ) solved : A :...
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usaco
USACO SILVER::2019 February - The Great Revegetation (silver)
USACO SILVER
USACO SILVER::2019 February - The Great Revegetation (silver) Link : USACO BOJ::17038 Link : USACO contest::2019 February 유사코 실버 ...
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usaco
USACO SILVER::2019 February - Painting the Barn (silver)
USACO SILVER
USACO SILVER::2019 February - Painting the Barn (silver) Link : USACO BOJ::17037 Link : USACO contest::2019 February 유사코 실버 ...
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usaco
USACO SILVER::2019 February - Sleepy Cow Herding (silver)
USACO SILVER
USACO SILVER::2019 February - Sleepy Cow Herding (silver) Link : USACO BOJ::17036 Link : USACO contest::2019 February 유사코 실버 ...
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usaco
USACO SILVER::2018 December - Mooyo Mooyo
USACO SILVER
USACO SILVER::2018 December - Mooyo Mooyo Link : USACO BOJ::16768 Link : USACO contest::2018 December 유사코 실버 Mooyo...
-
usaco
USACO SILVER::2018 December - Convention 2
USACO SILVER
USACO SILVER::2018 December - Convention 2 Link : USACO BOJ::16766 Link : USACO contest::2018 December 유사코 실버 Convention...
-
usaco
USACO SILVER::2018 December - Convention
USACO SILVER
USACO SILVER::2018 December - Convention Link : USACO BOJ::16766 Link : USACO contest::2018 December 유사코 실버 Convention ...
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codeforce div 2
COFO::Round 664
cofo round
COFO::Round #664 ( div 2 ) Link : COFO::round 664 ( div 2 ) solved : A : ( 00:08...
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codeforce div 2
COFO::Round 612
cofo round
COFO::Round #612 ( div 2 ) Link : COFO::round 612 ( div 2 ) solved : A : ( 00:10...
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codeforce div 3
COFO::Round 661
cofo round
COFO::Round #661 ( div 3 ) Link : COFO::round 661 ( div 3 ) solved : 4 A : 00:06...
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usaco
USACO SILVER::2020 US Open Contest - The Moo Particle
USACO SILVER
USACO SILVER::2020 US Open Contest The Moo Particle Link : USACO BOJ::18879 Link : USACO contest::usaco The Moo...
-
usaco
USACO SILVER::2020 US Open Contest - Cereal Distancing
USACO SILVER
USACO SILVER::2020 US Open Contest Cereal Link : USACO BOJ::18878 Link : USACO contest::usaco Cereal level :...
-
usaco
USACO SILVER::2020 US Open Contest - Social Distancing
USACO SILVER
USACO SILVER::2020 US Open Contest Social Distancing Link : USACO BOJ::18877 Link : USACO contest::usaco Social Ditancing ...
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codeforce div 2
COFO::Round 658
cofo round
COFO::Round #658 ( div 2 ) Link : COFO::round 658 (div 2) solved : A : ( 00:18 ) rank...
-
usaco
USACO SILVER::2020 January - Wormhole Sort
USACO SILVER
USACO SILVER::2020 January Wormhole Sort Link : USACO BOJ::18321 Link : USACO contest::2020 January Wormhole sort level...
-
usaco
USACO SILVER::2020 January - Loan Repayment
USACO SILVER
USACO SILVER::2020 January Loan Repayment Link : USACO BOJ::18320 Link : USACO contest::2020 January Link : Cararra <h1...
-
usaco
USACO SILVER::2020 February - Berry Picking
USACO SILVER
USACO SILVER::2020 January Berry Picking Link : USACO BOJ::18319 Link : USACO contest::2020 January Link : cararra <h1...
-
codeforce div 2
COFO::Round 649
cofo round
COFO::Round #649 ( div 2 ) Link : COFO::round 649 ( div 2 ) solved : B : ( 00:48...
-
usaco
USACO SILVER::2020 February - Clock tree
USACO SILVER
USACO SILVER::2020 February Clock tree Link : USACO BOJ::18785 Link : USACO contest Clock Tree level :...
-
usaco
USACO SILVER::2020 February - Triangles(Silver)
USACO SILVER
USACO SILVER::2020 February Triangles(Silver) Link : USACO BOJ::18784 Link : USACO contest Triangles(Silver) level : Platinum 5...
-
usaco
USACO SILVER::2020 February - Swapity Swapity Swap
USACO SILVER
USACO SILVER::2020 February Swapity Swapity Swap Link : USACO BOJ::18783 Link : USACO contest Swapity Swapity Swap ...
-
usaco
USACO silver Progress
USACO SILVER
USACO silver Progress Link : USACO on BOJ year Month Level number name link ...
-
usaco
USACO SILVER::2019 December - Milk Visits
USACO SILVER
USACO SILVER::2019 December : Milk Visits Link : USACO BOJ::18266 Meetings Link : USACO contest::2019 December Milk Visits...
-
usaco
USACO SILVER::2019 December - Meetings
USACO SILVER
USACO SILVER::2019 December : Meetings Link : USACO BOJ::18266 Meetings Link : USACO contest::2019 December Meetings level...
-
usaco
USACO SILVER::2019 December - MooBuzz
USACO SILVER
USACO SILVER::2019 December : MooBuzz Link : USACO BOJ::18265 MooBuzz Link : USACO contest::2019 December MooBuzz level...
-
codeforce div 2
COFO::Round 651
cofo round
COFO::Round #651 ( div 2 ) Link : COFO::round 651 ( div 2 ) solved : A : ( 00:31...
-
codeforce div 2
COFO::Round 652
cofo round
COFO::Round #652 ( div 2 ) Link : COFO::round 652 (div 2) solved : A : ( 00:03 )...
-
codeforce div 2
COFO::Round 654
cofo round
COFO::Round #654 ( div 2 ) Link : COFO::654 ( div 2 ) solved : A : ( 00:11...
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TEST
2020.06.07 certi
certi
시험 이글은 같은 실수를 반복하지 않기 위해, 실수를 복기하는 차원에서 작성하였습니다. 인재개발원 비슷한 문제 어른 상어 스타트 택시 ...
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BOJ
BOJ::16918 봄버맨
BOJ Silver 1
BOJ::16918 봄버맨 Link : BOJ::16918 Level : Silver1 tag : implmentation 시사점 현재 제출한 코드와 이전에 제출했던 코드들을...
-
swea
SWEA::2383 점심 식사시간
software expert academy
swea::2383 점심 식사시간 Link : swea::2383 시사점 변수 하나를 잘못 사용하여, 찾는데 정말 많은 시간을 소모하였습니다. 로직이 분명히...
-
swea
SWEA::5658 보물상자 비밀번호
software expert academy
swea::5658 보물상자 비밀번호 Link : swea::5658 시사점 기초적인 구현 문제입니다. 이해(3) 변의 갯수에 대한 설명이...
-
swea
SWEA::4014 활주로 건설
software expert academy
swea::4014 활주로 건설 Link : swea::4014 시사점 재미있는 index 조작 문제입니다. 실제 시험에 나온다면 정말 조작이 쉽지 않을...
-
swea
SWEA::4013 특이한 자석
software expert academy
swea::4013 특이한 자석 Link : swea::4013 시사점 많이들 풀어보셨을만한 자석 문제입니다. 인덱스가 헷갈려서 실수하기 쉽습니다. 이해(4)...
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swea
SWEA::2477 차량 정비소
software expert academy
swea::2477 차량 정비소 Link : swea::2477 implementation, simulation 시사점 난이도가 높은 구현 문제입니다. 매번...
-
codeforce div 2
COFO::Round 610
cofo round
COFO::Round #610 ( div 2 ) Link : COFO::round 610 ( div 2 ) solved : A : ( 00:11...
-
swea
SWEA::5656 벽돌 깨기
software expert academy
swea::5656 벽돌 깨기 Link : swea::5656 Level : 시사점 backtrack 이해(5) 총 4개의 구슬을 쏠...
-
swea
SWEA::5648 원자 소멸 시뮬레이션
software expert academy
swea::5648 원자 소멸 시뮬레이션 Link : swea::5648 Level : 시사점 신기하게도, 해당 문제에서 제출한 2개의 결과가 TLE와 AC였습니다....
-
BOJ
BOJ::15684 사다리 조작
BOJ Gold 5
BOJ::15684 사다리 조작 Link : BOJ::15684 Level : Gold 5 tag : brute force, backtrack 시사점 해당 문제처럼,...
-
codeforce div 2
COFO::Round 642
cofo round
COFO::Round #642 ( div 2 ) Link : COFO::round 642 ( div 2 ) solved : A : ( 00:11...
-
BOJ
BOJ::1395 스위치
BOJ Platinum 3
BOJ::1395 스위치 Link : BOJ::1395 Level : Platinum 3 tag : segment tree, lazy propagation 시사점 약간의 응용이...
-
codeforce div 2
COFO::Round 641
cofo round
COFO::Round #641 ( div 2 ) Link : COFO::round 641 ( div 2 ) solved : A : ( 00:09...
-
BOJ
BOJ::2230 수 고르기
BOJ Gold 5
BOJ::2230 수 고르기 Link : BOJ::2230 Level : Gold 5 tag : two pointer, binary search 시사점 2가지...
-
BOJ
BOJ::2096 내려가기
BOJ Gold 4
BOJ::2096 내려가기 Link : BOJ::2096 Link : Ries Level : Gold 4 tag : sliding window 시사점 ...
-
BOJ
BOJ::2003 수들의 합 2
BOJ Silver 3
BOJ::2003 수들의 합 2 Link : BOJ::2003 Link : Ries Level : Silver 3 tag : two pointers <h1...
-
codeforce div 4
COFO::Round 640
cofo round
COFO::Round #640 ( div 4 ) Link : COFO::round 640 ( div 4 ) Link : gunwookim 해석은 건우김님의...
-
BOJ
BOJ::16118 달빛 여우
BOJ Gold 2
BOJ::16118 달빛 여우 Link : BOJ::16118 Level : Gold 2 tag : dijkstra 시사점 이해(x) 토끼와 거북이가...
-
codeforce div 2
COFO::Round 639
cofo round
COFO::Round 639 ( div 2 ) Link : COFO::round 639 ( div 2 ) Link : gunwookim solved : ...
-
BOJ
BOJ::2985 세수
BOJ Bronze 3
BOJ::2985 세수 Link : BOJ::2985 Level : Bronze 3 tag : math 시사점 문제를 꼼꼼히 따져봐야 함을 일깨워주는...
-
BOJ
BOJ::14867 물통
BOJ Gold 2
BOJ::14867 물통 Link : BOJ::14867 Link : JusticeHui Level : Gold 2 tag : bfs 시사점 KOI...
-
BOJ
BOJ::14461 소가 길을 건너간 이유 7
BOJ Gold 2
BOJ::14461 소가 길을 건너간 이유 7 Link : BOJ::14461 Link : JusticeHui Level : Gold 2 tag : dijkstra ...
-
codeforce div 2
COFO::Round 609
cofo round
COFO::Round #609 ( div 2 ) Link : COFO::609 ( div 2 ) solved : A : ( 00:25 )...
-
BOJ
BOJ::2174 로봇 시뮬레이션
BOJ Gold 5
BOJ::2174 로봇 시뮬레이션 Link : BOJ::2174 Level : Gold 5 tag : simulation 시사점 시키는 대로 진행하면 되는...
-
BOJ
BOJ::16637 괄호 추가하기
BOJ Gold 3
BOJ::16637 괄호 추가하기 Link : BOJ::16637 Level : Gold 3 tag : brute force 시사점 구현이 생각보다 지저분해질...
-
BOJ
BOJ::15683 감시
BOJ Gold 5
BOJ::15683 감시 Link : BOJ::15683 Level : Gold 5 tag : brute force, implementation 시사점 N이 매우작은데도 TLE가...
-
BOJ
BOJ::11559 Puyo Puyo
BOJ Gold 5
BOJ::11559 Puyo Puyo Link : BOJ::11559 Level : Gold 5 tag : bfs, implementation 시사점 재미있는 문제입니다. 상하...
-
BOJ
BOJ::2133 타일 채우기
BOJ Silver 2
BOJ::2133 타일 채우기 Link : BOJ::2133 Level : Silver 2 tag : dynamic programming 시사점 간단해보이지만, 이해하는데 꽤...
-
BOJ
BOJ::17144 미세먼지 안녕!
BOJ Gold 5
BOJ::17144 미세먼지 안녕! Link : BOJ::17144 Level : Gold 5 tag : implementation, simulation 시사점 시뮬레이션 문제입니다. 공기청정기의...
-
BOJ
BOJ::14503 로봇 청소기
BOJ Gold 5
BOJ::14503 로봇 청소기 Link : BOJ::14503 Level : Gold 5 tag : implementation, simulation 시사점 실수한 부분을 찾느라...
-
BOJ
BOJ::1011 Fly me to the Alpha Centauri
BOJ Silver 1
BOJ::1011 Fly me to the Alpha Centauri Link : BOJ::1011 Level : Silver1 tag : math 시사점 풀이법이...
-
codeforce div 2
COFO::Round 638
cofo round
COFO::Round #638 ( div 2 ) Link : COFO:: solved : A : ( 00:32 ) score : 401 rank...
-
BOJ
BOJ::3954 Brainfsck 인터프리터
BOJ Gold 1
BOJ::3954 Brainfsck 인터프리터 Link : BOJ::3954 Level : Gold 1 tag : implementation 원문과 달리 왜 문제 제목에 아스테리스크를 넣었는지는 모르겠습니다....
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BOJ
BOJ::17140 이차원 배열과 연산
BOJ Gold 4
BOJ::17140 이차원 배열과 연산 Link : BOJ::17140 Level : Gold 4 tag : implementation, simulation 시사점 재밌는 구현...
-
BOJ
BOJ::16940 BFS 스페셜 저지
BOJ Gold 4
BOJ::16940 BFS 스페셜 저지 Link : BOJ::16940 Level : Gold 4 tag : bfs 시사점 좋은 시사점을 가지는...
-
BOJ
BOJ::2967 그리스-로마 건축
BOJ Gold 1
BOJ::2967 그리스-로마 건축 Link : BOJ::2967 Link : COCI Informatics Level : Gold 1 tag : brute force, implementation ...
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BOJ
BOJ::16987 계란으로 계란치기
BOJ Silver 2
BOJ::16987 계란으로 계란치기 Link : BOJ::16987 Level : Silver 2 tag : brute force, backtrack 시사점 naive 하게...
-
BOJ
BOJ::16957 체스판 위의 공
BOJ Gold 4
BOJ::16957 체스판 위의 공 Link : BOJ::16957 Level : Gold 4 tag : dfs, dynamic programming, graph theory 시사점...
-
BOJ
BOJ::1400 화물차
BOJ Gold 2
BOJ::1400 화물차 Link : BOJ::1400 Level : Gold 2 tag : dijkstra, graph theory, implementation 시사점 로직은 간단하지만,...
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BOJ
BOJ::10875 뱀
BOJ Gold 1
BOJ::10875 뱀 Link : BOJ::10875 Link : baactree Level : Gold 1 tag : implementation 시사점 정말...
-
BOJ
BOJ::1035 조각 움직이기
BOJ Gold 1
BOJ::1035 조각 움직이기 Link : BOJ::1035 Level : Gold 1 tag : brute force 시사점 navie한 완전 탐색이면,...
-
BOJ
BOJ::17069 파이프 옮기기 2
BOJ Gold 5
BOJ::17069 파이프 옮기기 2 Link : BOJ::17069 Level : Gold 5 tag : dynamic programming 시사점 기본 DP...
-
BOJ
BOJ::16959 체스판 여행 1
BOJ Gold 1
BOJ::16959 체스판 여행 1 Link : BOJ::16959 Level : Gold 1 tag : bfs 시사점 좋은 bfs 문제입니다....
-
codeforce div 2
COFO::Round 608
cofo round
COFO::Round #608 ( div 2 ) Link : COFO::round 608 ( div 2 ) solved : 3 A : (...
-
BOJ
BOJ::2931 가스관
BOJ Gold 3
BOJ::2931 가스관 Link : BOJ::2931 Level : Gold 3 tag : brute force 시사점 shpere 온라인에 제출해도 AC이고,...
-
BOJ
BOJ::17780 새로운 게임
BOJ Gold 2
BOJ::17780 새로운 게임 Link : BOJ::17780 Link : beenpow(새로운 게임2) Level : Gold 2 tag : implementation 시사점...
-
BOJ
BOJ::17081 RPG Extreme
BOJ Platinum 1
BOJ::17081 RPG Extreme Link : BOJ::17081 Level : Platinum 1 tag : implementation 시사점 정말 좋은, 재밌는 구현...
-
BOJ
BOJ::16988 Baaaaaaaaaduk2 (Easy)
BOJ Gold 3
BOJ::16988 Baaaaaaaaaduk2 (Easy) Link : BOJ::16988 Level : Gold 3 tag : brute force 시사점 흰돌 중심으로 bfs를...
-
BOJ
BOJ::12094 2048(Hard)
BOJ Platinum 5
BOJ::12094 2048(Hard) Link : BOJ::2048 Level : Platinum 5 tag : backtrack 시사점 퇴각 검색 스킬 중 하나를...
-
BOJ
BOJ::9328 열쇠
BOJ Gold 1
BOJ::9328 열쇠 Link : BOJ::9328 Level : Gold 1 tag : bfs, bitmasking 시사점 언제 풀어도, 쉽지 않은...
-
BOJ
BOJ::2638 치즈
BOJ Gold 4
BOJ::2638 치즈 Link : BOJ::2638 치즈 Level : Gold 4 tag : bfs 시사점 치즈를 녹이는 문제입니다. 눈여겨...
-
BOJ
BOJ::2636 치즈
BOJ Gold 5
BOJ::2636 치즈 Link : BOJ::2636 Link : beenpow:2638 Level : Gold 5 tag : bfs 시사점 2638...
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BOJ
BOJ::1600 말이 되고픈 원숭이
BOJ Gold 5
BOJ::1600 말이 되고픈 원숭이 Link : BOJ::1600 Level : Gold 5 tag : bfs 시사점 원숭이는 최대 k번...
-
codeforce div 2
COFO::Round 607
cofo round
COFO::Round #607 Link : COFO::604 (div2) solved : 1 A : ( 5m ) score : 490 rank : 2189...
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BOJ
BOJ::9019 DSLR
BOJ Gold 5
BOJ::9019 DSLR Link : BOJ::9019 Level : Gold 5 tag : bfs 시사점 이해(2) A와 B가 입력으로...
-
BOJ
BOJ::6087 레이저 통신
BOJ Gold 4
BOJ::6087 레이저 통신 Link : BOJ::6087 Level : Gold 4 tag : 시사점 이해(4) 시작점 C에서 도착점...
-
BOJ
BOJ::2151 거울 설치
BOJ Gold 4
BOJ::2151 거울 설치 Link : BOJ::2151 거울 설치 Level : Gold 4 tag : 시사점 이해(2) 맵이...
-
BOJ
BOJ::1938 통나무 옮기기
BOJ Gold 3
BOJ::1938 통나무 옮기기 Link : BOJ::1938 Level : Gold 3 tag : bfs 구현력이 필요한, 좋은 문제입니다. 시사점 <h1...
-
codeforce event
COFO::Round CodeCraft-20
cofo round
COFO::CodeCraft-20 ( Div 2 ) Link : COFO::CodeCraft-20 ( div 2 ) 정말 어려운 그래프 탐색 문제입니다. 하지만, 관점을 다르게 생각하는...
-
BOJ
BOJ::2357 최솟값과 최댓값
BOJ Platinum 5
BOJ::2357 최솟값과 최댓값 Link : BOJ::2357 Level : Platinum 5 tag : segment tree 시사점 좋은 well-known 세그먼트...
-
codeforce div 2
COFO::Round Beta 29
cofo round
COFO::Beta Round 29 ( div 2 ) Link : COFO::Beta round 29 ( div 2 ) Link :MarioYC 처음...
-
BOJ
BOJ::1965 상자넣기
BOJ Silver 2
BOJ::1965 상자넣기 Link : BOJ::1965 Level : Silver 2 tag : 동적 계획법 시사점 LIS문제입니다. 이해(x)...
-
codeforce div 2
COFO::Round 606
cofo round
COFO::Round #606 ( div 2 ) Link : COFO::606 ( div 2 ) solved : 2 B : ( 00:59...
-
BOJ
BOJ::2846 오르막길
BOJ Bronze 2
BOJ::2846 오르막길 Link : BOJ::2846 Level : Bronze 2 tag : implementation 시사점 간단한 문제이지만, 틀렸을때 corner case를...
-
BOJ
BOJ::17492 바둑알 점프
BOJ Gold 3
BOJ::17492 바둑알 점프 Link : BOJ::17492 Level : Gold 3 tag : dfs 시사점 재밌는 아이디어를 가진 문제입니다....
-
BOJ
BOJ::2407 조합
BOJ Silver 2
BOJ::2407 조합 Link : BOJ::2407 Level : Silver 2 tag : combination 시사점 조합 nCk에 대한 값을 구합니다....
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BOJ
BOJ::16234 인구 이동
BOJ Gold 5
BOJ::16234 인구 이동 Link : BOJ::16234 Level : Gold 5 tag : bfs 시사점 이해(4) n(맵의 사이즈),...
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codeforce div 2
COFO::Round 635
cofo round
COFO::Round #635 ( div 2 ) Link : COFO::635(div 2) solved : 1 A : ( 13m ) rank...
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codeforce div 2
COFO::Round 604
cofo round
COFO::Round #604 Link : COFO:: solved : 2 A : 01:04 B : 01:30 rank : 3859 virtual : yes...
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BOJ
BOJ::2294 동전 2
BOJ Silver 1
BOJ::2294 동전 2 Link : BOJ::2294 Link : sihyungyou Level : Silver1 tag : DP 시사점 좋은...
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BOJ
BOJ::2293 동전 1
BOJ Silver 1
BOJ::2293 동전 1 Link : BOJ::2293 Link : sihyungyou Level : Silver1 tag : DP 시사점 좋은...
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codeforce div 2
COFO::Round 603
cofo round
COFO::Round #603 ( div 2 ) virtual : yes Link : COFO::603 (div 2) 0 solved A와 C번은 editorial을 봐도...
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swea
SWEA::5653 [모의 SW 역량테스트] 줄기세포배양
software expert academy
swea::5653 [모의 SW 역량테스트] 줄기세포배양 Link : swea::5653 줄기세포배양 Level : 시사점 나무 재테크 + a 수준의 빡구현...
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codeforce div 2
COFO::Round 602
cofo round
COFO::Round #602 ( div 2 ) Link : COFO::round 602 (div 2) 0 solved A, B 두 개 풀었지만, 안타깝게도...
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codeforce div 2
COFO::Round 601
cofo round
COFO::Round #601 ( div 2 ) Link : COFO:: 2 solved A : 00:09 B : 00:58 score...
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codeforce div 2
COFO::Round 600
cofo round
COFO::Round #600 Link : COFO:: 600 (div2) 2 solved in time A : 33m B : 57m score : 928...
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codeforce rounds
COFO::Round Progress
cofo problem
COFO::Round Progress board No. virtual day round solved score rank reviewed link ...
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BOJ
BOJ::2917 늑대 사냥꾼
BOJ Gold 2
BOJ::2917 늑대 사냥꾼 Link : BOJ::2917 Link : COCI 2009 Level : Gold 2 시사점 좋은 map/list...
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BOJ
BOJ::18188 다오의 데이트
BOJ Gold 4
BOJ::18188 다오의 데이트 Link : BOJ::18188 Level : Gold 4 시사점 BFS 문제입니다. 재밌는 점은, 마리드의 방해때문에 방문한...
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BOJ
BOJ::9944 NxM 보드 완주하기
BOJ Gold 3
BOJ::9944 NxM 보드 완주하기 Link : BOJ::9944 Level : Gold 3 시사점 모든 정점에서 시작하는 경로탐색 문제입니다. 따라서,...
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BOJ
BOJ::2169 로봇 조종하기
BOJ Gold 1
BOJ::2169 로봇 조종하기 Link : BOJ::2169 Level : Gold 1 시사점 좋은 DP 문제입니다. 설계에만 47분을 사용한 문제이고,...
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programmers
Programmers::2019 카카오 겨울 인턴십::호텔방 배전
programmers
2019 카카오 겨울 인턴십 문제에 대한 풀이입니다. 1, 2 번도 제출하였지만, 대회끝나고 나니 코드가 따로 저장되어 있지 않네요. 따라서, 재밌는 문제인 4, 5...
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codeforce div 2
COFO::Round 630
cofo round
COFO::Round #630 ( div 2 ) Link : COFO::630 ( div 2 ) 4번째 코포입니다. 7문제에 2시간 반이 주어졌습니다. B, C...
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BOJ
BOJ::18312 시각
BOJ Bronze 2
BOJ::18312 시각 Link : BOJ::18312 Level : Bronze 2 시사점 실수한 점이 있어서 기록으로 남깁니다. 문제에서 제시한 예를...
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codeforce div 3
COFO::Round 629
cofo round
COFO::Round #629 Link : COFO::629 - div3 div3 는 처음 치뤄봤습니다. div2 보다는 난이도 책정이 낮겠지만, 어쨌든 난이도에 따라 점수에 플러스...
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BOJ
BOJ::14584 암호 해독
BOJ Bronze 1
BOJ::14584 암호 해독 Link : BOJ::14584 Level : Bronze 1 시사점 설계 실수를 하여, 시간을 좀 소모한 구현문제입니다....
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BOJ
BOJ::16462 '나교수' 교수님의 악필
BOJ Bronze 2
BOJ::16462 ‘나교수’ 교수님의 악필 Link : BOJ::16462 Level : Bronze 2 시사점 문제를 잘못읽는 실수는 문제의 난이도와 관계없이...
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codeforce educational
COFO::Round edu round 84
cofo round
COFO EDU::Round #84 [Link : COFO EDU::round 84] (https://codeforces.com/contest/1327) 두 번째 코포 라운드였습니다. 2개 풀이를 목표로 하였지만, greedy 하게 생각하지 못한 탓에...
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BOJ
BOJ::5363 요다
BOJ Bronze 2
BOJ::5363 요다 Link : BOJ::5363 Level : Bronze 2 시사점 입력 관련 좋은 문제입니다. getline의 경우 ‘\n’도 입력...
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BOJ
BOJ::18809 Gaaaaaaaaaarden
BOJ Gold 1
BOJ::18809 Gaaaaaaaaaarden Link : BOJ::18809 Level : Gold 1 시사점 좋은 시뮬레이션 문제입니다. 삼성 A형 기출로 나올법한 분위기의...
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BOJ
BOJ::18808 스티커 붙이기
BOJ Gold 3
BOJ::18808 스티커 붙이기 Link : BOJ::18808 Level : Gold 3 시사점 좋은 완전탐색/구현 문제입니다. A형 문제에 나올법한 문제입니다....
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BOJ
BOJ::17090 미로 탈출하기
BOJ Gold 2
BOJ::17090 미로 탈출하기 Link : BOJ::17090 Level : Gold 2 시사점 DFS 문제입니다. 이전에 방문했던 지점들이 결론적으로 탈출에...
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BOJ
BOJ::16437 양 구출 작전
BOJ Gold 2
BOJ::16437 양 구출 작전 Link : BOJ::16437 Level : Gold 2 시사점 좋은 트리 문제입니다. “각 섬에서 1번...
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BOJ
BOJ::6316 Pushing Boxes
BOJ Gold 2
BOJ::6316 Pushing Boxes Link : BOJ::6316 Level : Gold 2 시사점 문제에 주어진 단서 하나를 빠뜨리고 구현하는 실수로...
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BOJ
BOJ::16920 확장 게임
BOJ Gold 2
BOJ::16920 확장 게임 Link : BOJ::16920 Link : cofo:: Round #533(Div.2) Level : Gold 2 시사점 정말...
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BOJ
BOJ::1175 배달
BOJ Gold 1
BOJ::1175 배달 Link : BOJ::1175 Level : Gold 1 시사점 설계상의 실수를 저질렀습니다. 처음 접근은 단순 bfs였습니다. 물론...
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TEST
삼성 코딩테스트 대비 실수 모음
Mistakes
실수 모음 Link : Jongman 좋은 코드를 구성하기 위한 전략/실수에 대한 종류 모음 ~3월 21일 <img src="/img/meta-chart.png" alt="img2"...
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BOJ
BOJ::1414 불우이웃돕기
BOJ Gold 1
BOJ::1414 불우이웃돕기 Link : BOJ::1414 Level : Gold 1 시사점 기본적인 크루스칼 문제입니다. 하지만, 유향 그래프가 주어지므로 생각하기에...
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BOJ
BOJ::2948 2009년
BOJ Bronze 2
BOJ::2948 2009년 Link : BOJ::2948 Level : Bronze 2 시사점 실수를 유발하는 좋은 문제입니다. “첫째 줄에 D 와...
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BOJ
BOJ::2909 캔디 구매
BOJ Bronze 2
BOJ::2909 캔디 구매 Link : BOJ::2909 Level : Bronze 2 시사점 시사점이 있는 좋은 문제입니다. 반올림은 보통 round함수로...
-
BOJ
BOJ::10423 전기가 부족해
BOJ Gold 1
BOJ::10423 전기가 부족해 Link : BOJ::10423 Level : Gold 1 시사점 재밌고 좋은 MST 문제입니다. 30분동안 고민만 했습니다....
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BOJ
BOJ::15559 내 선물을 받아줘
BOJ Gold 1
BOJ::15559 내 선물을 받아줘 Link : BOJ::15559 Link : BOJ::16725 Level : Gold 1 시사점 해당 문제와...
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BOJ
BOJ::6416 트리인가?
BOJ Gold 5
BOJ::6416 트리인가? Link : BOJ::6416 Level : Gold 5 시사점 정점의 갯수를 최대 10만개까지 사용하면 AC를 받을 수...
-
BOJ
BOJ::4358 생태학
BOJ Gold 4
BOJ::4358 생태학 Link : BOJ::4358 Link : beenpow::Trie Level : Gold 4 시사점 여러모로 좋은 문제입니다. ...
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BOJ
BOJ::3584 가장 가까운 공통 조상
BOJ Gold 4
BOJ::3584 가장 가까운 공통 조상 Link : BOJ::3584 Link : beenpow::LCA 설명 Level : Gold 4 시사점 ...
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BOJ
BOJ::15792 A/B - 2
BOJ Bronze 3
BOJ::15792 A/B - 2 Link : BOJ::15792 Level : Bronze 3 시사점 구현 문제들은 대부분 로직을 묻는 경우가...
-
BOJ
BOJ::9366 삼각형 분류
BOJ Bronze 3
BOJ::9366 삼각형 분류 Link : BOJ::9366 Level : Bronze 3 시사점 좋은 문제입니다. 삼각형의 정의를 되짚습니다. 삼각형...
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BOJ
BOJ::6976 Divisibility by 11
BOJ Bronze 2
BOJ::6976 Divisibility by 11 Link : BOJ::6976 Link : CCC Level : Bronze 2 시사점 좋은 구현...
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BOJ
BOJ::1333 부재중 전화
BOJ Bronze 3
BOJ::1333 부재중 전화 Link : BOJ::1333 Level : Bronze 3 시사점 난이도에 상관없이 실수는 어디서든 발생하는 것 같습니다....
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BOJ
BOJ::1874 스택 수열
BOJ Silver 3
BOJ::1874 스택 수열 Link : BOJ::1874 Level : Silver 3 시사점 굉장히 단순해보이지만 시간을 꽤 소모하였고, 좋은 문제라고...
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BOJ
BOJ::1967 트리의 지름
BOJ Gold 4
BOJ::1967 트리의 지름 Link : BOJ::1967 Level : Gold 4 시사점 재밌는 트리 문제입니다. 키 <h1...
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BOJ
BOJ::18224 미로에 갇힌 건우
BOJ Gold 2
BOJ::18224 미로에 갇힌 건우 Link : BOJ::18224 Level : Gold 2 시사점 상태를 정의하는 재미가 있는 문제입니다. ...
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BOJ
BOJ::14675 단절점과 단절선
BOJ Gold 5
BOJ::14675 단절점과 단절선 Link : BOJ::14675 Link : beenpow::cut vertex and bridge Level : Gold 5 시사점 ...
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codeforce div 2
COFO::Round 626
cofo round
COFO::Round #626, Div 2 [Link : COFO::626] (https://codeforces.com/contest/1323) 첫 코드포스 경험이었습니다. B번 문제를 최적화 하는 과정에서 시간을 많이 소모했습니다. 3개를 풀려고 목표를...
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BOJ
BOJ::6987 월드컵
BOJ Silver 3
BOJ::6987 월드컵 Link : BOJ::6987 Link : KCF Level : Silver 3 시사점 combination을 손으로 구할 수...
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BOJ
BOJ::15971 두 로봇
BOJ Gold 5
BOJ::15971 두 로봇 Link : BOJ::15971 Level : Gold 5 시사점 괜찮은 다익스트라 문제입니다. 키 <h1...
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BOJ
BOJ::2869 달팽이는 올라가고 싶다
BOJ Bronze 2
BOJ::2869 달팽이는 올라가고 싶다 Link : BOJ::2869 Level : Bronze 2 시사점 2가지 시사점이 있어서 업로드하였습니다. int...
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BOJ
BOJ::2231 분해합
BOJ Bronze 2
BOJ::2231 분해합 Link : BOJ::2231 Level : Bronze 2 시사점 문제가 시사하는 바를 catch해내는 것이 이 문제의 핵심인...
-
BOJ
BOJ::1712 손익분기점
BOJ Bronze 4
BOJ::1712 손익분기점 Link : BOJ::1712 Level : Bronze 4 시사점 2가지 풀이법이 존재합니다. const a + b...
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BOJ
BOJ::1010 다리 놓기
BOJ Silver 5
BOJ::1010 다리 놓기 Link : BOJ::1010 Level : Silver 5 시사점 동적 계획법으로 풀이하였습니다. dp에 익숙치 않아서, 아이디어를...
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BOJ
BOJ::12738 가장 긴 증가하는 부분 수열 3
BOJ Gold 2
BOJ::12738 가장 긴 증가하는 부분 수열 3 Link : BOJ::12738 Link : Ries님 Level : Gold 2 시사점...
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BOJ
BOJ::1149 RGB 거리
BOJ Silver 1
BOJ::1149 RGB 거리 Link : BOJ::1149 Level : Silver1 시사점 동적 계획법 문제입니다. 문제에 약간 중의 적인 표현이...
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BOJ
BOJ::10172 개
BOJ Bronze 5
BOJ::10172 개 Link : BOJ::10172 Level : Bronze 5 시사점 키 이해(x) 큰 따옴표와 역 슬래시에...
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BOJ
BOJ::1008 A/B
BOJ Bronze 4
BOJ::1008 A/B Link : BOJ::1008 Level : Bronze 4 시사점 소수점 9자리까지 유효하게 출력하고 싶다면 %.9f를 이용합니다. 또한,...
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BOJ
BOJ::3197 백조의 호수
BOJ Gold 2
BOJ::3197 백조의 호수 Link : BOJ::3197 Link : Croatian Highschool Competition in informatics 2005 Level : Gold 2 <h1...
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BOJ
BOJ::3019 테트리스
BOJ Silver 1
BOJ::3019 테트리스 Link : BOJ::3019 Link : Croatian Highschool Competitions in formatics 2007 Level : Siler 1 시사점...
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BOJ
BOJ::16198 에너지 모으기
BOJ Silver 1
BOJ::16198 에너지 모으기 Link : BOJ::16198 Level : Silver1 시사점 backtrack 기본 문제입니다. 구슬을 삭제하는 부분을 유의합니다. ...
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BOJ
BOJ::3568 iSharp
BOJ Silver 5
BOJ::3568 iSharp Link : BOJ::3568 Link : NEERC 2008 Level : Silver 5 시사점 문자열을 이용하여 구현하는...
-
BOJ
BOJ::2933 미네랄
BOJ Gold 3
BOJ::2933 미네랄 Link : BOJ::2933 Level : Gold 3 시사점 예전에 풀다가 실패했던 문제를 다시 집어들었습니다. 매우 좋은...
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BOJ
BOJ::2290 LCD Test
BOJ Silver 3
BOJ::2290 LCD Test Link : BOJ::2290 Link : MCERC Level : Silver3 시사점 매우 좋은 문제입니다. 구현...
-
BOJ
BOJ::5214 환승
BOJ Gold 1
BOJ::5214 환승 Link : BOJ::5214 Link : 꾸준함 Level : Gold 1 시사점 아주 좋은 문제입니다. 메모리초과를...
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BOJ
BOJ::4531 Verdis Quo
BOJ Gold 5
BOJ::4531 Verdis Quo Link : BOJ::4531 Level : Gold 5 시사점 규칙을 만족하는 로마숫자가 주어집니다. 규칙을 만족하는지 여부를...
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BOJ
BOJ::2115 갤러리
BOJ Gold 4
BOJ::2115 갤러리 Link : BOJ::2115 Link : COCI Olympiad Croatian Highschool Competitions in formatics 2003 National Competition #2 - Junior...
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BOJ
BOJ::10836 여왕벌
BOJ Gold 5
BOJ::10836 여왕벌 Link : BOJ::10836 Level : Gold 5 시사점 좋은 시사점을 갖는 문제입니다. 처음 문제를 풀땐, 한...
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swea
SWEA::5644 [모의 SW 역량테스트] 무선 충전
software expert academy
swea::5644 [모의 SW 역량테스트] 무선 충전 Link : swea::5644 Level : 시사점 좋은 구현/시뮬레이션 문제라고 생각합니다. <h2...
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BOJ
BOJ::16722 결!합!
BOJ Gold 3
BOJ::16722 결!합! Link : BOJ::16722 Level : Gold 3 시사점 매우 좋은 구현문제라고 생각합니다. 문제를 해석하고, 구현하기까지 시간이...
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swea
SWEA::1953 [모의 SW역량테스트] 탈주범 검거
software expert academy
swea::1953 [모의 SW역량테스트] 탈주범 검거 Link : swea::1953 Link : BOJ::2931 Level : 시사점 백준의 가스관과 비슷한...
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BOJ
BOJ::1184 귀농
BOJ Gold 1
BOJ::1184 귀농 Link : BOJ::1184 Link : COCI Level : Gold 1 시사점 정말 좋은 문제라고 생각합니다....
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BOJ
BOJ::14868 문명
BOJ Platinum 4
BOJ::14868 문명 Link : BOJ::14868 Link : beenpow::UnionFind Level : Platinum 4 시사점 유니온파인드와 맵을 이용하여 접근을...
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BOJ
BOJ::17394 핑거 스냅
BOJ Gold 5
BOJ::17394 핑거 스냅 Link : BOJ::17394 Level : Gold 5 시사점 소수구하기 + BFS 문제입니다. 이분탐색을 이용하여 시간을...
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BOJ
BOJ::1719 택배
BOJ Gold 5
BOJ::1719 택배 Link : BOJ::1719 Link : wiki :: Dijkstra Level : Gold 5 시사점 다익스트라 문제입니다....
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BOJ
BOJ::14451 안대 낀 스피드러너
BOJ Gold 1
BOJ::14451 안대 낀 스피드러너 Link : BOJ::14451 Level : Gold 1 시사점 구슬 탈출 3 문제와 비슷한 유형입니다....
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BOJ
BOJ::11451 팩맨
BOJ Gold 3
BOJ::11451 팩맨 Link : BOJ::11451 Link : BOJ::15644 Link : BAPC 2015 Preliminaries Level : Gold 3 <h1...
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BOJ
BOJ::2042 구간 합 구하기
BOJ Platinum 5
BOJ::2042 구간 합 구하기 Link : BOJ::2042 Link : beenpow::1275::커피숍2 Link : beenpow::FenWickTree Level : Platinum 5 <h1...
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BOJ
BOJ::17130 토끼가 정보섬에 올라온 이유
BOJ Gold 2
BOJ::17130 토끼가 정보섬에 올라온 이유 Link : BOJ::17130 Level : Gold 2 시사점 문제를 처음 읽을때, N이 1000인...
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BOJ
BOJ::1275 커피숍2
BOJ Platinum 5
BOJ::1275 커피숍2 Link : BOJ::1275 Link : beenpow::segmentTree Level : Platinum 5 시사점 세그먼트 트리 문제입니다. 종만북에서...
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BOJ
BOJ::16023 RoboThieves
BOJ Gold 1
title : BOJ::16023 RoboThieves categories: - sweaB - BOJ - 백준 tag: - sweaB - BOJ - 백준 — BOJ::16023 RoboThieves...
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BOJ
BOJ::11085 군사 이동
BOJ Gold 2
BOJ::11085 군사 이동 Link : BOJ::11085 Level : Gold 2 시사점 다익스트라 문제입니다. 조금 다른 점은 priority_queue를...
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BOJ
BOJ::10766 제국
BOJ Platinum 5
BOJ::10776 제국 Link : BOJ::10776 Link : CCC Link : solution/tc Link : crocus::SPFA Level : Platinum 5...
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BOJ
BOJ::2819 상근이의 로봇
BOJ Gold 1
BOJ::2819 상근이의 로봇 Link : BOJ::2819 Level : Gold 1 시사점 누가봐도 그냥 구현하면 시간초과를 불러일으키는 문제였습니다. 시간초과를...
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BOJ
BOJ::1113 수영장 만들기
BOJ Platinum 5
BOJ::1113 수영장 만들기 Link : BOJ::1113 Level : Platinum 5 시사점 (0,0)을 시작점으로 탐색하여 변곡점을 찾는 재귀로 구현하려...
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BOJ
BOJ::9376 탈옥
BOJ Platinum 5
BOJ::9376 탈옥 Link : BOJ::9376 Link : rebas::9376 Level : Platinum 5 시사점 접근 부터 잘못하였습니다. “상근이가...
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BOJ
BOJ::2598 기둥만들기
BOJ Gold Platinum 5
BOJ::2598 기둥만들기 Link : BOJ::2598 Link : 한국코드페어 KOI 한국정보올림피아드 초등학교 3번 문제 Level : Platinum 5 시사점...
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BOJ
BOJ::17500 국경
BOJ Platinum 5
BOJ::17500 국경 Link : BOJ::17500 Level : Platinum 5 시사점 생각보다 간단해 보였지만, 시간이 꽤 소모되었습니다. 시간 제한은...
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BOJ
BOJ::15949 Piet
BOJ Platinum 4
BOJ::15949 Piet Link : BOJ::15949 Level : Platinum 4 시사점 맞왜틀을 꽤 오래하였습니다. 끝까지 틀린 점을 찾은 결과...
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BOJ
BOJ::14927 전구 끄기
BOJ Platinum 5
BOJ::14927 전구 끄기 Link : BOJ::14927 Level : Platinum 5 시사점 비트마스킹으로 풀면 체크할때 시간을 아낄 수 있습니다....
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codeforce event
COFO::Round Good Bye 2014
cofo round
COFO::Round Good Bye 2014 Link : COFO Problem A : New Year Transportation level : 1100 tag :...
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swea
SWEA::2382 [모의 SW 역량테스트] 미생물 격리
software expert academy
swea::2382 [모의 SW 역량테스트] 미생물 격리 Link : swea::2382 Level : 시사점 보통 구현 혹은 완탐문제에서는 관리해야 할...
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swea
SWEA::2117 [모의 SW 역량테스트] 홈 방범 서비스
software expert academy
swea::2117 [모의 SW 역량테스트] 홈 방범 서비스 swea::2117 Level : 시사점 TL 을 막기 위해 여러 고민을 하게...
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swea
SWEA::2105 [모의 SW 역량테스트] 디저트 카페
software expert academy
swea::2105 [모의 SW 역량테스트] 디저트 카페 [swea] : https://swexpertacademy.com/main/code/problem/problemDetail.do?contestProbId=AV5VwAr6APYDFAWu Level : 시사점 마름모 방향으로 순회하는 탐색문제입니다. 모든 경로를...
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BOJ
BOJ::1647 도시 분할 계획
BOJ Gold 4
BOJ::1647 도시 분할 계획 [BOJ] : https://www.acmicpc.net/problem/1647 Level : Gold 4 시사점 최소 스패닝 트리 문제입니다. 마을을 어떻게...
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BOJ
BOJ::1506 경찰서
BOJ Gold 2
BOJ::1506 경찰서 [BOJ] : https://www.acmicpc.net/problem/1506 Level : Gold 2 시사점 SCC 기본 문제입니다. 각 SCC 그룹별로 최솟값을 더하면...
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BOJ
BOJ::11097 도시 계획
BOJ Platinum 5
BOJ::11097 도시 계획 [BOJ] : https://www.acmicpc.net/problem/11097 Level : Platinum 5 [ISPC] : https://ipsc.ksp.sk/archive [종만북 SCC] : https://beenpow.github.io/jongman/2020/01/01/Jongman-ch28-7/...
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BOJ
BOJ::4577 소코반
BOJ Gold 1
BOJ::4577 소코반 [BOJ] : https://www.acmicpc.net/problem/4577 Level : Gold 1 시사점 문제 이해에만 40분을 사용하였습니다. 이후 로직은 명백하며, map을...
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BOJ
BOJ::16236 아기 상어
BOJ Gold 5
BOJ::16236 아기 상어 [BOJ] : https://www.acmicpc.net/problem/16236 Level : Gold 5 시사점 손 코딩 후에 문제를 풀었습니다. visited를 체크하지...
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BOJ
BOJ::16235 나무 재테크
BOJ Gold 5
BOJ::16235 나무 재테크 [BOJ] : https://www.acmicpc.net/problem/16235 Level : Gold 5 시사점 명료하게 정리하고 문제를 풀었습니다. 하지만, 정리할때 로직에...
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BOJ
BOJ::17143 낚시왕
BOJ Gold 3
BOJ::17143 낚시왕 [BOJ] : https://www.acmicpc.net/problem/17143 Level : Gold 3 시사점 구현 문제입니다. 잘잘한 실수가 모여서 태산이 됩니다. ...
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BOJ
BOJ::17142 연구소 3
BOJ Gold 4
BOJ::17142 연구소 3 [BOJ] : https://www.acmicpc.net/problem/17142 Level : Gold 4 시사점 문제에서 결정적으로 요구하는 한 문장에 집중할 필요가...
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BOJ
BOJ::17070 파이프 옮기기 1
BOJ Gold 5
BOJ::17070 파이프 옮기기 1 [BOJ] : https://www.acmicpc.net/problem/17070 Level : Gold 5 시사점 큰 실수를 하나 했습니다. 이 문제가...
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BOJ
BOJ::15898 피아의 아틀리에~신비한 대회의 연금술사~
BOJ Gold 1
BOJ::15898 피아의 아틀리에~신비한 대회의 연금술사~ [BOJ] : https://www.acmicpc.net/problem/15898 Level : Gold 1 시사점 어마어마한 구현 문제입니다. Logic은 쉽게...
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BOJ
BOJ::17822 원판 돌리기
BOJ Gold 3
BOJ::17822 원판 돌리기 [BOJ] : https://www.acmicpc.net/problem/17822 Level : Gold 3 시사점 구현력을 요하는 문제입니다. 기존의 N * M...
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BOJ
BOJ::17825 주사위 윷놀이
BOJ Gold 3
BOJ::17825 주사위 윷놀이 [BOJ] : https://www.acmicpc.net/problem/17825 Level : Gold 3 시사점 아주 좋은 구현력 문제라고 생각합니다. 디버깅에 아주...
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BOJ
BOJ::17136 색종이 붙이기
BOJ Gold 3
[BOJ] : https://www.acmicpc.net/problem/17136 Level : Gold 3 시사점 아주 큰 실수로 디버깅을 오래 한 문제입니다. 재귀 함수 내에서 사용하는...
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BOJ
BOJ::17135 캐슬 디펜스
BOJ Gold 4
BOJ::17135 캐슬 디펜스 [BOJ] : https://www.acmicpc.net/problem/17135 Level : Gold 4 시사점 List를 관리하는 연습에 좋은 문제입니다. <h1...
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BOJ
BOJ::17837 새로운 게임 2
BOJ Gold 2
BOJ::17837 새로운 게임 2 [BOJ] : https://www.acmicpc.net/problem/17837 Level : Gold 2 시사점 기존의 새로운 게임 문제와의 차이점은 다음과...
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BOJ
BOJ::17780 새로운 게임
BOJ Gold 1
BOJ::17780 새로운 게임 [BOJ] : https://www.acmicpc.net/problem/17780 Level : Gold 1 시사점 Update를 헷갈리지 않게 하는 것이 문제의 관건입니다....
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BOJ
BOJ::17406 배열 돌리기 4
BOJ Gold 5
BOJ::17406 배열 돌리기 4 [BOJ] : https://www.acmicpc.net/problem/17406 Level : Gold 5 시사점 여러 번 풀어 본 문제이지만, 항상...
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BOJ
BOJ::17281 야구공
BOJ Gold 4
BOJ::17281 야구공 [BOJ] : https://www.acmicpc.net/problem/17281 Level : Gold 4 시사점 삼성 기출문제로 나올법한 구현 문제입니다. 디버깅 챕터에 실수에...
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BOJ
BOJ::16434 드래곤 앤 던전
BOJ Gold 3
BOJ::16434 드래곤 앤 던전 [BOJ] : https://www.acmicpc.net/problem/16434 Level : Gold 3 시사점 구현력과 이분탐색의 개념이 포함된 문제입니다. numeric_limits...
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BOJ
BOJ::17472 다리 만들기 2
BOJ Gold 3
BOJ::17472 다리 만들기 2 [BOJ] : https://www.acmicpc.net/problem/17472 Level : Gold 3 시사점 로직은 간단하지만, 구현력을 요하는 문제라고 생각합니다....
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BOJ
BOJ::17471 게리맨더링
BOJ Gold 5
BOJ::17471 게리맨더링 [BOJ] : https://www.acmicpc.net/problem/17471 Level : Gold 5 시사점 Bipartite 하는 문제입니다. 삼성 A 형 기출문제입니다. ...
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BOJ
BOJ::15644 구슬 탈출 3
BOJ Gold 3
BOJ::15644 구슬 탈출 3 [BOJ] : https://www.acmicpc.net/problem/15644 Level : Gold 3 시사점 구슬 탈출 1, 2 에 이은...
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BOJ
BOJ::14620 꽃길
BOJ Silver 1
BOJ::14620 꽃길 [BOJ] : https://www.acmicpc.net/problem/14620 Level : Silver 1 시사점 backtrack 기본 문제입니다. 이해(3) 총...
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BOJ
BOJ::2064 IP 주소
BOJ Gold 3
BOJ::IP 주소 [BOJ] : https://www.acmicpc.net/problem/2064 Level : Gold 3 시사점 2시간 30분 동안 푼 문제입니다. 로직은 생각보다 간단했지만,...
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BOJ
BOJ::17141 연구소 2
BOJ Gold 5
BOJ::17141 연구소 2 [BOJ] : https://www.acmicpc.net/problem/17141 Level : Gold 5 시사점 bfs 기본 구현 문제입니다. 요즘 bfs 문제를...
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BOJ
BOJ::16933 벽 부수고 이동하기3
BOJ Gold 2
BOJ::16933 벽 부수고 이동하기 3 [BOJ] : https://www.acmicpc.net/problem/16933 Level : Gold 2 시사점 처음 보는 유형의 문제입니다. 모든...
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BOJ
BOJ::3108 로고
BOJ Gold 5
BOJ::3108 로고 [BOJ] : https://www.acmicpc.net/problem/3108 Level : Gold 3 시사점 Croatian 문제 중 적절한 난이도의 문제입니다. 문제를 해결하는...
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BOJ
BOJ::8972 미친 아두이노
BOJ Gold 5
BOJ::8972 미친 아두이노 [BOJ] : https://www.acmicpc.net/problem/8972 Level : Gold 5 시사점 swea 사이트에서 기출 문제로 자주 있는 유형입니다....
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BOJ
BOJ::4256 트리
BOJ Gold 5
BOJ::4256 트리 [BOJ] : https://www.acmicpc.net/problem/4256 Level : Gold 5 시사점 종만북에 비슷한 문제가 트리 챕터에서 나왔던 것 같습니다....
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BOJ
BOJ::2606 바이러스
BOJ Silver 2
BOJ::2606 바이러스 [BOJ] : https://www.acmicpc.net/problem/2606 Level : Silver 2 시사점 BFS 기본 문제이지만, 코드를 올리는 까닭은 이런 문제...
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BOJ
BOJ::16196 중국 신분증 번호
BOJ Gold 4
BOJ::16196 중국 신분증 번호 [BOJ] : https://www.acmicpc.net/problem/16196 Level : Gold 4 시사점 쉽게 생각하고 조금만 생각하고 코드짜기 시작했다가...
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BOJ
BOJ::12764 싸지방에 간 준하
BOJ Gold 5
BOJ::12764 싸지방에 간 준하 [BOJ] : https://www.acmicpc.net/problem/12764 Level : Gold 5 시사점 priority_queue와 set을 자연스럽게 다룰 수 있으면...
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BOJ
BOJ::1197 최소 스패닝 트리
BOJ Gold 4
BOJ::1197 최소 스패닝 트리 [BOJ] : https://www.acmicpc.net/problem/1197 Level : Gold 4 시사점 최소 스패닝 트리에 대한 기본 문제입니다....
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BOJ
BOJ::8982 수족관 1
BOJ Gold 5
BOJ::8982 수족관 1 [BOJ] : https://www.acmicpc.net/problem/8982 Level : Gold 5 시사점 경계가 주어지고, 해당 경계를 통해 어떻게 맵을...
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BOJ
BOJ::1939 중량 제한
BOJ Gold 5
BOJ::1939 중량 제한 [BOJ] : https://www.acmicpc.net/problem/1939 Level : Gold 5 시사점 여러 가지 풀이법이 존재하여, 배울게 많은 문제라고...
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BOJ
BOJ::17836 공주님을 구해라!
BOJ Gold 5
BOJ::17836 공주님을 구해라! [BOJ] : https://www.acmicpc.net/problem/17836 Level : Gold 5 시사점 너비 우선 탐색 기본 문제입니다. <h1...
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BOJ
BOJ::17779 게리맨더링 2
BOJ Gold 5
BOJ::17779 게리맨더링 2 [BOJ] : https://www.acmicpc.net/problem/17779 Level : Gold 5 시사점 골드 5 라기엔, 심히 빡구현 문제 느낌입니다....
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BOJ
BOJ::3980 선발 명단
BOJ Gold 4
BOJ::3980 선발 명단 [BOJ] : https://www.acmicpc.net/problem/3980 Level : Gold 4 시사점 bactrack 기본 문제입니다. 이해(4) ...
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BOJ
BOJ::2252 줄 세우기
BOJ Gold 2
BOJ::2252 줄 세우기 [BOJ] : https://www.acmicpc.net/problem/2252 Level : Gold 2 시사점 위상 정렬 기본 문제라고 생각합니다. 해당 문제를...
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BOJ
BOJ::2056 작업
BOJ Gold 3
BOJ::2056 작업 [BOJ] : https://www.acmicpc.net/problem/2056 Level : Gold 3 시사점 최소 시간을 출력해야 하는 문제인데, queue 처리 중...
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BOJ
BOJ::1766 문제점
BOJ Gold 2
BOJ::1766 문제집 [BOJ] : https://www.acmicpc.net/problem/1766 Level : Gold 2 시사점 우선순위 큐를 이용한 위상정렬 문제입니다. 이해(2)...
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BOJ
BOJ::1516 게임 개발
BOJ Gold 2
BOJ::1516 게임 개발 [BOJ] : https://www.acmicpc.net/problem/1516 Level : Gold 2 시사점 백준 문제와 비슷한 위상 정렬 문제입니다. 이...
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BOJ
BOJ::14699 관악산 등산
BOJ Gold 5
BOJ::14699 관악산 등산 [BOJ] : https://www.acmicpc.net/problem/14699 Level : Gold 5 시사점 위상 정렬, memoization 으로 풀 수 있는...
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BOJ
BOJ::14567 선수과목
BOJ Gold 5
BOJ::14567 선수과목 [BOJ] : https://www.acmicpc.net/problem/14567 Level : Gold 5 시사점 문제 제목 그대로, 선수 과목에 대한 탐색 문제입니다....
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BOJ
BOJ::14502 연구소
BOJ Gold 5
BOJ::14502 연구소 [BOJ] : https://www.acmicpc.net/problem/14502 Level : Gold 5 시사점 시뮬레이션 + 백트랙킹 기본 문제입니다. 이해(6)...
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BOJ
BOJ::6536 Robot
BOJ Gold 5
BOJ::6536 Robot [BOJ] : https://www.acmicpc.net/problem/6356 Level : Gold 5 시사점 I guess there are lots of similar problems....
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BOJ
BOJ::5980 CORN MAZE
BOJ Gold 5
BOJ::5980 CORN MAZE [BOJ] : https://www.acmicpc.net/problem/5980 Level : Gold 5 시사점 USACO US Open 2011 Context Silver 문제입니다....
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BOJ
BOJ::1062 가르침
BOJ Gold 4
BOJ::1062 가르침 [BOJ] : https://www.acmicpc.net/problem/1062 Level : Gold 4 시사점 시간을 많이 쏟았지만, 런타임에러를 탈출하지 못했습니다. 다시 풀어봐야할...
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BOJ
BOJ::1613 역사
BOJ Gold 3
BOJ::1613 역사 [BOJ] : https://www.acmicpc.net/problem/1613 Level : Gold 3 시사점 그래프 이론 중 하나인 플로이드-와샬 기본 문제라고 생각합니다....
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BOJ
BOJ::1325 효율적인 해킹
BOJ Silver 2
BOJ::1325 효율적인 해킹 [BOJ] : https://www.acmicpc.net/problem/1325 Level : Silver 2 시사점 인접 행렬로 제출하면 시간초과가 나지만, 인접 리스트로...
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BOJ
BOJ::1068 트리
BOJ Silver 1
BOJ::1068 트리 [BOJ] : https://www.acmicpc.net/problem/1068 Level : Silver1 시사점 자식의 수가 제한이 없는 트리의 삽입과 삭제에 대한 좋은...
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BOJ
BOJ::9205 맥주 마시면서 걸어가기
BOJ Gold 5
BOJ::9205 맥주 마시면서 걸어가기 [BOJ] : https://www.acmicpc.net/problem/9205 Level : Gold 5 시사점 플로이드 와샬 알고리즘 이해(10)...
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BOJ
BOJ::2251 물통
BOJ Silver 1
BOJ::2251 물통 [BOJ] : https://www.acmicpc.net/problem/2251 Level : Silver1 시사점 BFS 기본문제 + 약간의 로직 이해(5) ...
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알고리즘 문제해결 전략
Ch.29.4 문제 ID CHILDRENDAY
종만북
29.4 문제: 어린이날 ( 문제ID : CHILDRENDAY, 난이도: 상) [algo] : https://www.algospot.com/judge/problem/read/CHILDRENDAY 저자가 설명을 잘 해주었지만, 제 수준에서는 이해하기 어려운 문제라고...
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알고리즘 문제해결 전략
Ch.29.2 문제 ID SORTGAME
종만북
29.2 문제: Sorting Game ( 문제ID : SORTGAME, 난이도: 중) [algo] : https://www.algospot.com/judge/problem/read/SORTGAME 시사점 map은 Hash와 비슷한 방법이므로 접근하는 속도가...
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알고리즘 문제해결 전략
Ch.29.1 그래프의 너비 우선 탐색
종만북
29.1 도입 이 장에서는 깊이 우선 탐색과 함께 가장 널리 사용되는 그래프 탐색 알고리즘인 너비 우선 탐색에 대해 다룹니다. 너비 우선 탐색은...
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TEST
2020.01.18 swea B형
B형
시험 swea B형 비슷한 문제 패인 문제를 이해하고 naive의 naive설계를 하는데만 1시간가량이 걸렸다. 문제가 길게 나오고, 코드도 함께...
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BOJ
BOJ::1525 퍼즐
BOJ Gold 3
BOJ::1525 퍼즐 Level : Gold 3 시사점 비트마스킹을 시도해서 간략화 해보려 하였지만, 쉽지 않은 문제 입니다. 참고 코드들을 통해...
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codeforce div 2
COFO::Round Good Bye 2016
cofo round
COFO::Round Good Bye 2016 [COFO] : https://codeforces.com/contest/750 Problem A : New Year and Hurry 난이도 : 800 문제 분류 :...
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codeforce div 2
COFO::Round 4
cofo round
COFO::Round #0004 Problem C 난이도 : 1500 문제 분류 data structures hashing implementation 시사점 hashing을...
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BOJ
BOJ::2504 괄호의 값
BOJ Silver 3
BOJ::2504 괄호의 값 Level : Silver 3 시사점 stack을 사용 및 활용하는 문제입니다. <input type="checkbox" class="task-list-item-checkbox" disabled="disabled"...
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BOJ
BOJ::5373 큐빙
BOJ Gold 2
BOJ::5373 큐빙 Level : Gold 2 시사점 시뮬레이션 구현력 강화 char형 변수를 선언하여 input을 받을때는 항상 MAX_LEN+1의 사이즈를 할당하여,...
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BOJ
BOJ::12867 N차원 여행
BOJ Silver 3
BOJ::12867 N차원 여행 Level : Silver 3 시사점 map과 set의 사용 Hashing의 사용 이해(30) Hashing으로 푸는...
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swea
SWEA::5110 [B형 대비] 수열 합치기
software expert academy
swea::5110 수열 합치기 Level : 문제 시사점 Double Linked List를...
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BOJ
BOJ::2512 예산
BOJ Silver 3
BOJ::2512 예산 Level : Silver 3 시사점 이분 탐색의 사용 이분 탐색은 사람마다 정형화시켜서 사용한다. <div...
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BOJ
BOJ::14864 줄서기
BOJ Gold 5
BOJ::14864 줄서기 Level : Gold 5 시사점 정렬된 상태에서 시작하는 점 이 부분은 조금 특이합니다. 문제에 있는 단서들만을...
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BOJ
BOJ::3425 고스택
BOJ Gold 2
BOJ::3425 고스택 Level : Gold 2 시사점 시뮬레이션문제로써, 빡빡하게 경우의 수를 나눠 표현하는 것이 문제가 원하는 바라고 생각합니다. 현재...
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BOJ
BOJ::1920 수 찾기
BOJ Silver 4
BOJ::1920 수 찾기 Level : Silver4 시사점 N(100000)에 비해 입력 정수형의 범위는 int 범위이다. 따라서 좌표 압축이 필요한...
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BOJ
BOJ::14670 병약한 영정
BOJ Silver 3
BOJ::14670 병약한 영정 Level : Silver 3 시사점 hash를 사용할 수 있는 문제입니다. array사용법과 linkedList 사용법에 대해 각각...
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BOJ
BOJ::1158 조세퍼스 문제
BOJ Bronze 5
BOJ::1158 조세퍼스 문제 Level : Bronze 5 시사점 주로 사용하는 q대신, Linked List 를 사용한 풀이 이해(2)...
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BOJ
BOJ::5052 전화번호 목록
BOJ Gold 3
BOJ::5052 전화번호 목록 Level : Gold 3 시사점 두 가지 방법으로 풀어보았습니다. 단순 정렬후 i번째와 i+1번째 비교 접두사...
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BOJ
BOJ::2866 문자열 잘라내기
BOJ Silver 1
BOJ::2866 문자열 잘라내기 Level : Silver1 시사점 Hash의 사용(STL의 map 가능) Hash_size와 PN은 임의 책정 가능합니다. 문제에서 주어진...
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알고리즘 문제해결 전략
Ch.28.8 문제 ID GALLERY
종만북
28.8 문제: 감시 카메라 설치 ( 문제ID : GALLERY, 난이도: 중) 문제 분류 지배 집합의 개념 루트 없는 트리의 성립 조건...
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알고리즘 문제해결 전략
Ch.28.7 이론적 배경과 응용
종만북
이론적 배경과 응용 깊이 우선 탐색의 +a 버전이라고 생각합니다. 깊이 우선 탐색과 간선의 분류 그래프의 간선들을 분류하면 그래프의 구조에...
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알고리즘 문제해결 전략
Ch.28.5 문제 ID WORDCHAIN
종만북
28.5 문제: 단어 제한 끝말잇기 ( 문제ID : WORDCHAIN, 난이도: 하) 풀이 요약 이해가 쉽지 않았던 만큼, 다시 복습할때 빠르게 상기시키기...
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알고리즘 문제해결 전략
Ch.28.4 오일러 서킷
종만북
해당 챕터 정리 오일러 서킷의 모든 점에서는 경로가 들어온 횟수와 나간 횟수가 같아야 합니다. 무향 그래프에서는 각 정점에 인접한 간선이...
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알고리즘 문제해결 전략
Ch.28.2 문제 ID DICTIONARY
종만북
28.2 문제: 고대어 사전 ( 문제ID : DICTIONARY, 난이도: 하) 문제 분류 깊이 우선탐색과 위상정렬을 이용하는 방법은 처음 본 방법이라 흥미롭다....
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알고리즘 문제해결 전략
Ch.28.10 문제 ID MEETINGROOM
종만북
28.10 문제: 회의실 배정 ( 문제ID : MEETINGROOM, 난이도: 상) 문제 분류 SAT 문제 변수 함의 그래프 강결합 컴포넌트 ...
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알고리즘 문제해결 전략
Ch.28.1 그래프의 깊이 우선 탐색
종만북
28.1 도입 트리의 순회와 같이 그래프의 모든 정점들을 특이한 순서에 따라 방문하는 알고리즘들을 그래프의 탐색(search) 알고리즘이라고 합니다. 트리의 순회는 사실 트리에...
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알고리즘 문제해결 전략
Ch.27.1 그래프의 표현과 정의
종만북
27.1 도입 6부에서는 선형으로 표현하기 힘든 대표적인 구조인 계층 구조를 표현하기 위해 고안된 트리에 대해 다뤘습니다. 여기에서는 계층적인 구조보다 좀더 일반적이고 강력한...
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알고리즘 문제해결 전략
Ch.26.2 문제 ID SOLONG
종만북
26.2 문제: 안녕히,그리고 물고기는 고마웠어요! ( 문제ID : SOLONG, 난이도: 중) [algo] : https://algospot.com/judge/problem/read/SOLONG 문제 분류 (접두사) 트라이의 사용 ...
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알고리즘 문제해결 전략
Ch.26.1 트라이
종만북
26.1 도입 트라이(trie)는 문자열의 집합을 표현하는 자료 구조로, 집합 내에서 원소를 찾는 작업을 O(M) 시간만에 할 수 있습니다. 언제 사용하는가? 접두사...
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알고리즘 문제해결 전략
Ch.25.2 문제 ID EDITORWARS
종만북
25.2 문제: 에디터 전쟁( 문제ID : EDITORWARS, 난이도: 중) 문제 분류 상호 배제적 집합의 사용(확장판) size 사용 Bipartate에...
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알고리즘 문제해결 전략
Ch.25.1 상호 배타적 집합
종만북
25.1 도입 또 다른 형태의 독특한 트리로 상호 배타적 집합(disjoint set)을 표현할 때 쓰는 유니온-파인드(Union-Find) 자료 구조가 있습니다. 상호 배타적...
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알고리즘 문제해결 전략
Ch.24.7 문제 ID MEASURETIME
종만북
24.7 : 삽입 정렬 시간 재기 문제 ID : MEASURETIME, 난이도: 중) 문제 분류 펜윅 트리 이용 구간 트리 이용 이진...
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알고리즘 문제해결 전략
Ch.24.6 펜윅트리
종만북
24.6 펜윅 트리 : 빠르고 간단한 구간 합 구간 트리의 가장 흔한 사용 예는 바로 구간 합을 빠르게 구하는 것입니다. 이...
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알고리즘 문제해결 전략
Ch.24.4 문제 ID FAMILYTREE
종만북
24.4 문제: 족보 탐험 ( 문제ID : FAMILYTREE, 난이도: 상) 문제 분류 idea LCA(최소 공통 조상 찾기) 풀이를 이해하기에도...
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알고리즘 문제해결 전략
Ch.24.2 문제 ID MORDOR
종만북
24.2 문제: A ( 문제ID : MORDOR, 난이도: 중) [algo] (https://algospot.com/judge/problem/read/MORDOR) 문제 분류 RMQ 클래스의 사용 ...
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알고리즘 문제해결 전략
Ch.24.1 구간 트리(segment tree)
종만북
24.1 구간 트리: 구간에 대한 질문 대답하기 이제까지 다룬 트리들은 모두 자료들을 특정 순서대로 저장하고, 추가/삭제하는 등 자룔를 저장하는 용도로 사용되었습니다만, 이들...
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알고리즘 문제해결 전략
Ch.23.3 문제 ID RUNNINGMEDIAN
종만북
23.3 문제: 변화하는 중간 값( 문제ID : RUNNINGMEDIAN, 난이도: 하) 문제 분류 heap을 통해 중간 값 출력하기 priority_queue 를 이용한...
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알고리즘 문제해결 전략
Ch.23.1 우선순위 큐와 힙
종만북
23.1 도입 트리와 밀접하게 연관도니 다른 자료 구조로 우선순위 큐가 있습니다. 단 우선순위 큐에서는 가장 먼저 입력된 자료가 가장 먼저 꺼내지는...
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알고리즘 문제해결 전략
Ch.22.7 문제 ID INSERTION
종만북
22.7 문제: 삽입 정렬 뒤집기( 문제ID : INSERTION, 난이도: 중) 문제 분류 트립의 활용 문제 Insertion...
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알고리즘 문제해결 전략
Ch.22.6 균형 잡힌 이진 검색 트리 직접 구현하기:트립
종만북
22.6 균형 잡힌 이진 검색 트리 직접 구현하기 : 트립 균형 잡힌 이진 트리로는 AVL트리, 레드 블랙 트리 등이 있지만 구현이 매우...
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swea
SWEA::1768 [B형 대비] 숫자 야구 게임
software expert academy
swea 1768 숫자 야구 게임 문제 분류 idea swea B 결국 구현에는 실패하였지만, 효율이 좋은 코드를 차용하여 이해하였습니다. ...
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알고리즘 문제해결 전략
Ch.22.4 문제 ID NERDS2
종만북
22.4 문제 : 너드인가, 너드가 아닌가?2 (문제ID : NERDS2, 난이도: 중) (algo) : https://algospot.com/judge/problem/read/NERD2# 문제 분류 idea 트리 ...
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알고리즘 문제해결 전략
Ch.22.1 이진 검색 트리
종만북
22.1 도입 트리는 계측정 구조를 표현하는 것 외에도 다양한 용도로 사용되며, 그중 대표적인 것이 검색트리(search tree) 입니다. 검색트리는 리스트나 큐처럼 자료들을...
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알고리즘 문제해결 전략
Ch.21.5 문제 ID FORTRESS
종만북
21.5 문제: 요새(문제 ID : FORTRESS, 난이도 : 중) 문제 분류 트리 트리의 구성 트리의 높이 트리의 path 중 최장길이...
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알고리즘 문제해결 전략
Ch.21.3 문제 ID TRAVERSAL
종만북
21.3 문제: 트리 순회 순서 변경 ( 문제ID : TRAVERSAL, 난이도: 하) 분류 : 트리의 pre/in/post order에 대한 이해 문제...
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알고리즘 문제해결 전략
Ch.21.1 트리의 구현과 순회
종만북
21.1 도입 정의 트리 : 계층적 구조를 갖는 자료들을 표현하기 위한 자료 구조 기초적인 정의와 용어 트리의 구성...
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swea
SWEA::1770 [B형 대비] 블록 맞추기
software expert academy
1770 블록 맞추기 [swea] : https://swexpertacademy.com/main/code/problem/problemDetail.do?contestProbId=AV4szU-qXKYDFAUf&& 블록 맞추기에 대한 풀이는 박트리님의 코드를 이해하고 방법을 배우는 방식으로 정리하였습니다. 문제 분류 좌표...
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알고리즘 문제해결 전략
Ch.19.6 문제 ID ITES
종만북
19.6 문제: 외계 신호 분석 ( 문제ID : ITES, 난이도: 중) 분류 : 선형 자료구조의 이용 글쓴이의 최적화는 감탄을 자아낼 정도로, 중요한...
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알고리즘 문제해결 전략
Ch.19.4 문제 ID BRACKETS2
종만북
19.4 문제: 짝이 맞지 않는 괄호 ( 문제ID : BRACKETS2, 난이도: 하) 분류 : 스택의 사용 구현 책에 제시된...
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알고리즘 문제해결 전략
Ch.19.1 큐와 스택, 데크
종만북
19.1 도입 큐와 스택, 데크 큐와 스택, 데크는 일렬로 늘어선 같은 형태의 자료들을 저장합니다. 이때 세 자료 구조들을 구분하는 것은 어느...
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알고리즘 문제해결 전략
Ch.18.5 문제 ID JOSEPHUS
종만북
18.5 문제: 조세푸스 문제 ( 문제ID : JOSEPHUS, 난이도: 하) 분류 : 리스트의 사용 실수 : erase한 결과 위치인 cur가 end()인 경우,...
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알고리즘 문제해결 전략
Ch.18.1 선형 자료 구조
종만북
18.1 선형 자료 구조 일렬로 늘어선 같은 종류의 자료 여러 개를 저장하기 위한 가장 기초적인 자료 구조는 배열입니다. 동적 배열...
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알고리즘 문제해결 전략
Ch.17.2 문제 ID CHRISTMAS
종만북
17.2 문제: 크리스마스 인형( 문제ID : CHRISTMAS, 난이도: 중) 저자의 풀이는 심도있다. modular 연산의 정의를 이용하여 풀이를 하며, 주의를 기울여 따라가야 이해할...
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알고리즘 문제해결 전략
Ch.17.1 부분 합
종만북
제시된 예제에서 부분합을 구하는 부분이 O(N)에 가능하다는 것이 이해가 되지 않습니다. 17.1 부분 합 부분 합은 아래와 같은 것들을 구할때...
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professional
Pro::Hash
professional algorithm
해쉬(Hash) 정의 해쉬 함수 : 임의의 길이의 데이터를 고정된 길이의 데이터로 매핑하는 함수 해쉬 테이블 : 해쉬 함수를 이용해 만든 테이블 ...
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알고리즘 문제해결 전략
Ch.16.4 문제 ID GRADUATION
종만북
16.4 문제: 졸업학기 ( 문제ID : GRADUATION, 난이도: 중) 책에 제시된 풀이 이 문제를 푸는 한 가지 자연스러운 방법은 각 학기를...
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알고리즘 문제해결 전략
Ch.16.3 비트마스크의 응용 예제
종만북
지수 시간 동적 계획법 이 절에서는 배열 대신 정수로 집합을 표현하면 이것을 곧장 배열의 인덱스로 쓸 수 있다는 점을 이용합니다. 따라서...
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알고리즘 문제해결 전략
Ch.16.2 비트마스크를 이용한 집합의 구현
종만북
비트 마스크를 이용한 집합의 구현 비트 마스크의 가장 중요한 사용 사례는 집합을 구현하는 것입니다. 이 표현에서 N비트 정수 변수는 0부터 N-1까지의...
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알고리즘 문제해결 전략
Ch.16.1 비트마스크
종만북
도입 현대의 모든 CPU는 이진수를 이용해 모든 자료를 표현합니다. 이와 같은 특성을 이용해 정수의 이진수 표현을 자료 구조로 쓰는 기법을 비트마스크(bitmask)라고 부릅니다....
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알고리즘 문제해결 전략
Ch.14.8 모듈라 연산
종만북
모듈라 연산 모듈라 연산이란, 모듈로(modulus) M에 도달하면 다시 0으로 돌아가는 정수들을 가지고 하는 연산입니다. 모듈라 덧셈, 뺄셈, 그리고 곱셈 ...
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알고리즘 문제해결 전략
Ch.14.6 문제 ID POTION
종만북
14.6 문제: 마법의 약 ( 문제ID : POTION, 난이도: 중) 분류 : 최소 공약수 책에 제시된 두 번째 풀이법처럼 접근했지만, 결국 각...
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알고리즘 문제해결 전략
Ch.14.5 유클리드 알고리즘
종만북
14.5 유클리드 알고리즘 유클리드 알고리즘(Euclidean algorithm)은 두 수의 최대 공약수를 구하는 방법으로, 기록이 남아 있는 가장 오래된 알고리즘으로 유명합니다. 유클리드 알고리즘은...
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알고리즘 문제해결 전략
Ch.14.3 문제 ID PASS486
종만북
14.3 문제: 비밀번호 ( 문제ID : PASS, 난이도: 중) 분류 : 소인수분해 약수의 개수 구하기 약수의 수를 찾는 방법은...
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알고리즘 문제해결 전략
Ch.14.2 소수
종만북
14.2 소수 소수(prime number)는 정수론의 가장 중요한 연구 대상 중 하나로, 양의 약수가 1과 자기 자신 두 개 뿐인 자연수를 의미합니다. 소수의...
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알고리즘 문제해결 전략
Ch.10.6 문제 ID MINASTIRITH
종만북
10.6 문제: 미나스 아노르 ( 문제ID : MINASTIRITH, 난이도: 상) 분류 : 탐욕법 하나의 원이 cover하는 coverage 를 CS적으로 표현하기 쉽지 않은...
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알고리즘 문제해결 전략
Ch.10.4 문제 ID STRJOIN
종만북
10.4 문제: 문자열 합치기 ( 문제ID : STRJOIN, 난이도: 중) 분류 : 탐욕법 책에 제시된 풀이 탐욕적 알고리즘의 구상...
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알고리즘 문제해결 전략
Ch.10.2 문제 ID LUNCHBOX
종만북
10.2 문제: 도시락 데우기 ( 문제ID : LUNCHBOX, 난이도: 하) 분류 : 탐욕법 함수의 역할을 변수를 사용해서 한글로 정의하는 일, 문제를 수식으로...
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알고리즘 문제해결 전략
Ch.10.1 문제 ID MATCHORDER
종만북
10.1 문제: 출전 순서 정하기 ( 문제ID : MATCHORDER, 난이도: 하) 알고리즘 분류 : 탐욕법 실제 코드의 구현은 복잡하지 않지만, 중요한 것은...
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알고리즘 문제해결 전략
Ch.8.16 문제 ID NUMB3RS
종만북
8.16 문제: 두니발 박사의 탈옥 ( 문제ID : NUMB3RS, 난이도: 중) 문제 분류 : 동적계획법(메모리제이션) 문제의 예제 케이스도 틀렸습니다. 모든 확률 문제는...
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알고리즘 문제해결 전략
Ch.8.14 문제 ID POLY
종만북
8.14 문제: 폴리오미노 ( 문제ID : POLY, 난이도: 중) 분류 : 동적계획법( 메모이제이션 ) 손으로 일일이 그려보았지만, 적당한 메모이제이션을 사용할 수 있을...
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알고리즘 문제해결 전략
Ch.8.12 문제 ID ASYMTILING
종만북
8.12 문제: 비대칭 타일링 ( 문제ID : ASYMTILING, 난이도: 하) 문제 분류 : 동적계획법 (메모이제이션) 내가 시도한 접근 (실패) ...
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알고리즘 문제해결 전략
Ch.8.11-3 문제 ID 장마가 찾아왔다
종만북
8.11-3 문제: 장마가 찾아왔다 ( 문제ID : SNAIL, 난이도: 하) 해당 예제는 경우의 수로 확률을 계산하는 문제입니다. 동적계획법을 써 먹을 수 있습니다....
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알고리즘 문제해결 전략
Ch.8.11-2 문제 ID TRIPATHCNT
종만북
8.11-2 문제: 삼각형 위의 최대 경로 개수 세기 ( 문제ID : TRIPATHCNT, 난이도: 중) 기존에 풀었던, 아래 문제에 대한 변형 문제이다. <a...
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알고리즘 문제해결 전략
Ch.8.11-1 문제 ID TILING2
종만북
8.11-1 문제: 타일링 방법의 수 세기 ( 문제ID : TILING2, 난이도: 하) 이 문제는 오버플로에 유의하기 위한 문제입니다. 많은 경우 답이 일반적으로...
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알고리즘 문제해결 전략
Ch.8.9 문제 ID QUANTIZE
종만북
8.9 문제: Quantization ( 문제ID : QUANTIZE, 난이도: 중) 분류 : 동적계획 동적계획의 핵심은 점화식을 세우는 것이라고 생각합니다. 점화식을 세우기 위해서는,...
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알고리즘 문제해결 전략
Ch.8.7 문제 ID PI
종만북
8.7 문제: 원주율 구하기 ( 문제ID : PI, 난이도: 하) 문제 분류 : 동적계획법 ( 메모이제이션 ) 내 풀이(정답을 맞추지...
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알고리즘 문제해결 전략
Ch.8.5 문제 ID JLIS
종만북
8.5 문제: 합친 LIS ( 문제ID : JLIS, 난이도: 하) 분류 : 동적계획 LIS 문제풀이에서 사용한 lis3함수를 변형하여 풀이합니다. 즉, cache의 크기만...
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알고리즘 문제해결 전략
Ch.8.4-2 문제 ID LIS
종만북
8.4-2 문제: 최대 증가 부분 수열 ( 문제ID : LIS, 난이도: 하) 알고리즘 : 동적계획법 총 3가지의 풀이법을 제공한다. 완전...
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알고리즘 문제해결 전략
Ch.8.4-1 문제 ID TRIANGLEPATH
종만북
8.4-1 문제: 삼각형 위의 최대 경로 ( 문제ID : TRIANGLEPATH, 난이도: 하) 분류 : 동적계획법의 전통적 최적화 1 최적화 문제를 동적 계획법으로...
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알고리즘 문제해결 전략
Ch.8.2 문제 ID WILDCARD
종만북
8.2 문제: 와일드카드 ( 문제ID : WILDCARD, 난이도: 중) 분류 : 메모이제이션 논리적으로 해결해보려 하였지만, “이렇게 얽기 섥기 해서 풀릴까?” 라는 의구심이...
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알고리즘 문제해결 전략
Ch.8.1 동적계획법 [도입]
종만북
8.1 동적계획법 [도입] 중복되는 부분 문제 동적계획법과 분할 정복의 차이가 발생하는 부분은 문제를 나누는 방식입니다. 동적 계획법에서 어떤 부분 문제는 두...
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알고리즘 문제해결 전략
Ch.7.6 문제ID FANMEETING
종만북
7.6 문제: 팬미팅 ( 문제ID : FANMEETING, 난이도: 상) 분류 : 분할정복 난이도가 높은 문제이다. 책에 제시된 팬미팅의 풀이는 카라츠바 알고리즘을 이용하였다....
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알고리즘 문제해결 전략
Ch.7.4 문제 ID FENCE
종만북
7.4 문제: 울타리 잘라내기 ( 문제ID : FENCE, 난이도: 중) 분류 : 분할정복 책에 제시된 분할정복 풀이 접근법 분할 정복 알고리즘을...
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알고리즘 문제해결 전략
Ch 7.3 문제 ID QUADTREE
종만북
7.3 문제: 쿼드 트리 뒤집기(문제 ID:QUADTREE, 난이도:하) [algo] : https://algospot.com/judge/problem/read/QUADTREE 시도했지만, 풀지못하였음. 책에 제시된 것처럼 “무식하게 풀기”방법으로 푼다면, 공간초과 + 시간초과가...
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알고리즘 문제해결 전략
Ch 6.9 문제 ID CLOCKSYNC
종만북
6.9 문제: 시계맞추기(문제 ID:CLOCKSYNC, 난이도:중) [algo] : https://algospot.com/judge/problem/read/CLOCKSYNC 분류 : backtrack 복잡도 : 4^10 함정 : 각 스위치는 4번 누르면 안...
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알고리즘 문제해결 전략
Ch 6.6 문제 ID BOARDCOVER
종만북
6.6 문제: 게임판 덮기(문제 ID:BOARDCOVER, 난이도: 하) 분류 : backtrack 함정 : backtrack 중 중복처리 소요시간 : 5 + 6 + 16...
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알고리즘 문제해결 전략
Ch.6.3 문제ID PICNIC
종만북
6.3 문제: 소풍 ( 문제ID : PICNIC, 난이도: 하) 분류 : backtrack 함정 : backtrack 중 중복처리 책의 저자는 backtrac...
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알고리즘 문제해결 전략
Ch. 2 문제 해결 개관
종만북
Ch 2 문제 해결 개관 챕터의 제목에서 알 수 있듯이, 문제 풀이 접근법에 대해 다룹니다. 또한 해당 내용은 종만북의 내용을 부분 발췌하였으며, 문제가 될...
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알고리즘 문제해결 전략
알고리즘 문제해결 전략( 목차 )
종만북
1부 문제 해결 시작하기 1장 문제 해결과 프로그래밍 대회 Ch Description Done 1.1 도입 o...
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TEST
2019.11.16 swea A형
A형
시험 이글은 같은 실수를 반복하지 않기 위해, 실수를 복기하는 차원에서 작성하였습니다. 구현력을 요하는 문제가 나왔다고 생각한다. 비슷한 문제 로봇을...
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TEST
2019.10.20 certi
certi
시험 이글은 같은 실수를 반복하지 않기 위해, 실수를 복기하는 차원에서 작성하였습니다. 인재개발원 비슷한 문제 원판을 돌리는 문제 윷을 던져서...
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TEST
2019.09.07 swea A형
A형
시험 이글은 같은 실수를 반복하지 않기 위해, 실수를 복기하는 차원에서 작성하였습니다. 태풍 링링이 북상하던 날 시험을 봤습니다. 당시 시험을 대비하기 위해, BOJ에서...