随笔分类 - Codeforces
摘要：链接: https://vjudge.net/problem/CodeForces 598D 题意: Igor is in the museum and he wants to see as many pictures as possible. Museum can be represented a
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摘要：链接: https://vjudge.net/problem/CodeForces 1167C 题意: In some social network, there are n users communicating with each other in m groups of friends. Le
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摘要：链接: https://vjudge.net/problem/CodeForces 939A 题意: As you could know there are no male planes nor female planes. However, each plane on Earth likes so
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摘要：链接： https://codeforces.com/contest/1180/problem/C 题意： Recently, on the course of algorithms and data structures, Valeriy learned how to use a deque. H
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摘要：链接： https://codeforces.com/contest/1180/problem/B 题意： Nick had received an awesome array of integers a=[a1,a2,…,an] as a gift for his 5 birthday from
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摘要：链接： https://codeforces.com/contest/1180/problem/A 题意： While playing with geometric figures Alex has accidentally invented a concept of a n th order rh
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摘要：链接： https://codeforces.com/contest/1185/problem/D 题意： A sequence a1,a2,…,ak is called an arithmetic progression if for each i from 1 to k elements sat
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摘要：链接： https://codeforces.com/contest/1185/problem/C2 题意： The only difference between easy and hard versions is constraints. If you write a solution in P
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摘要：链接： https://codeforces.com/contest/1185/problem/B 题意： Methodius received an email from his friend Polycarp. However, Polycarp's keyboard is broken, so
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摘要：链接： https://codeforces.com/contest/1185/problem/A 题意： Polycarp decided to relax on his weekend and visited to the performance of famous ropewalkers: A
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摘要：链接： https://codeforces.com/contest/1182/problem/C 题意： You are given n words, each of which consists of lowercase alphabet letters. Each word contains
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摘要：链接： https://codeforces.com/contest/1182/problem/B 题意： You have a given picture with size w×h. Determine if the given picture has a single "+" shape or
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摘要：链接： https://codeforces.com/contest/1182/problem/A 题意： You have a given integer n. Find the number of ways to fill all 3×n tiles with the shape describ
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摘要：链接： https://codeforces.com/contest/1176/problem/C 题意： You are given an array a consisting of n integers. Each ai is one of the six following numbers:
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摘要：链接： https://codeforces.com/contest/1176/problem/B 题意： You are given an array a consisting of n integers a1,a2,…,an. In one operation you can choose tw
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摘要：链接： https://codeforces.com/contest/1176/problem/A 题意： You are given an integer n. You can perform any of the following operations with this number an
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摘要：链接：https://codeforces.com/contest/1173/problem/C 题意： Nauuo is a girl who loves playing cards. One day she was playing cards but found that the cards w
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摘要：链接：https://codeforces.com/contest/1173/problem/B 题意： Nauuo is a girl who loves playing chess. One day she invented a game by herself which needs nn ch
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摘要：链接：https://codeforces.com/contest/1173/problem/A 题意： Nauuo is a girl who loves writing comments. One day, she posted a comment on Codeforces, wonderin
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摘要：链接：https://codeforces.com/contest/1175/problem/B 题意： You are given a function ff written in some basic language. The function accepts an integer value
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