随笔分类 - 题库—Codeforces比赛
摘要：Ayush and Ashish play a game on an unrooted tree consisting of nn nodes numbered 11 to nn. Players make the following move in turns: Select any leaf n
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摘要：Shubham has a binary string ss. A binary string is a string containing only characters "0" and "1". He can perform the following operation on the stri
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摘要：A. Odd Selection time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Shubham has an array aa
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摘要：During the quarantine, Sicromoft has more free time to create the new functions in "Celex-2021". The developers made a new function GAZ-GIZ, which inf
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摘要：You've been in love with Coronavirus-chan for a long time, but you didn't know where she lived until now. And just now you found out that she lives in
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摘要：Maria is the most active old lady in her house. She was tired of sitting at home. She decided to organize a ceremony against the coronavirus. She has
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摘要：Due to the coronavirus pandemic, city authorities obligated citizens to keep a social distance. The mayor of the city Semyon wants to light up Gluharn
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摘要：You are given an undirected graph without self-loops or multiple edges which consists of nn vertices and mm edges. Also you are given three integers n
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摘要：The statement of this problem is the same as the statement of problem C1. The only difference is that, in problem C1, nn is always even, and in C2, nn
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摘要：The statement of this problem is the same as the statement of problem C2. The only difference is that, in problem C1, nn is always even, and in C2, nn
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摘要：You are given a string ss such that each its character is either 1, 2, or 3. You have to choose the shortest contiguous substring of ss such that it c
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摘要：Polycarp has spent the entire day preparing problems for you. Now he has to sleep for at least aa minutes to feel refreshed. Polycarp can only wake up
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摘要：Petya and Vasya are competing with each other in a new interesting game as they always do. At the beginning of the game Petya has to come up with an a
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摘要：Young wilderness explorers set off to their first expedition led by senior explorer Russell. Explorers went into a forest, set up a camp and decided t
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摘要：Let's define the following recurrence: an+1=an+minDigit(an)⋅maxDigit(an).an+1=an+minDigit(an)⋅maxDigit(an). Here minDigit(x)minDigit(x) and maxDigit(x
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摘要：You are given an array aa of length nn consisting of zeros. You perform nn actions with this array: during the ii -th action, the following sequence o
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摘要：You are given a board of size n×nn×n , where nn is odd (not divisible by 22 ). Initially, each cell of the board contains one figure. In one move, you
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摘要：You are given two arrays aa and bb both consisting of nn positive (greater than zero) integers. You are also given an integer kk . In one move, you ca
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摘要：You are given two integers nn and mm . You have to construct the array aa of length nn consisting of non-negative integers (i.e. integers greater than
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摘要：There are nn models in the shop numbered from 11 to nn , with sizes s1,s2,…,sns1,s2,…,sn . Orac will buy some of the models and will arrange them in t
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