随笔分类 - Codeforces
摘要：链接： https://codeforces.com/problemset/problem/915/E 题意： This year Alex has finished school, and now he is a first year student of Berland State Univer
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摘要：链接： http://codeforces.com/problemset/problem/600/E 题意： You are given a rooted tree with root in vertex 1. Each vertex is coloured in some colour. Let'
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摘要：链接： https://codeforces.com/contest/1270/problem/E 题意： You are given a set of n≥2 pairwise different points with integer coordinates. Your task is to p
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摘要：链接： https://codeforces.com/contest/1270/problem/D 题意： This problem is interactive. We have hidden an array a of n pairwise different numbers (this mea
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摘要：链接： https://codeforces.com/contest/1270/problem/C 题意： Let's call an array a1,a2,…,am of nonnegative integer numbers good if a1+a2+⋯+am=2⋅(a1⊕a2⊕⋯⊕am),
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摘要：链接： https://codeforces.com/contest/1270/problem/B 题意： For an array a of integers let's denote its maximal element as max(a), and minimal as min(a). We
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摘要：链接： https://codeforces.com/contest/1270/problem/A 题意： Two players decided to play one interesting card game. There is a deck of n cards, with values f
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摘要：链接： https://codeforces.com/contest/1279/problem/D 题意： Santa Claus has received letters from n different kids throughout this year. Of course, each kid
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摘要：链接： https://codeforces.com/contest/1279/problem/C 题意： Santa has to send presents to the kids. He has a large stack of n presents, numbered from 1 to n
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摘要：链接： https://codeforces.com/contest/1279/problem/B 题意： New Year is coming! Vasya has prepared a New Year's verse and wants to recite it in front of San
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摘要：链接： https://codeforces.com/contest/1279/problem/A 题意： Polycarp is sad — New Year is coming in few days but there is still no snow in his city. To brin
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摘要：链接： https://codeforces.com/contest/1281/problem/D 题意： You are an all powerful being and you have created a rectangular world. In fact, your world is s
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摘要：链接： https://codeforces.com/contest/1281/problem/C 题意： outputstandard output We start with a string s consisting only of the digits 1, 2, or 3. The len
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摘要：链接： https://codeforces.com/contest/1281/problem/B 题意： Your friend Jeff Zebos has been trying to run his new online company, but it's not going very we
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摘要：链接： https://codeforces.com/contest/1282/problem/C 题意： Petya has come to the math exam and wants to solve as many problems as possible. He prepared and
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摘要：链接： https://codeforces.com/contest/1282/problem/B2 题意： This is the hard version of this problem. The only difference is the constraint on k — the numb
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摘要：链接： https://codeforces.com/contest/1282/problem/A 题意： Polycarp lives on the coordinate axis Ox and travels from the point x=a to x=b. It moves uniform
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摘要：链接： https://codeforces.com/contest/1271/problem/E 题意： At first, let's define function f(x) as follows: f(x)={x2x−1if x is evenotherwise We can see tha
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摘要：链接： https://codeforces.com/contest/1271/problem/D 题意： You play a strategic video game (yeah, we ran out of good problem legends). In this game you con
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摘要：链接： https://codeforces.com/contest/1271/problem/C 题意： The map of the capital of Berland can be viewed on the infinite coordinate plane. Each point wit
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