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codeforces

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全部文章 / codeforces （共130篇）

C. The Football Season

链接：https://codeforces.com/contest/1244/problem/C The football season has just ended in Berland. According to the rules of Berland football, each matc...

2020-09-15

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B. Sheldon and Ice Pieces

链接：https://codeforces.com/problemset/problem/328/B Do you remember how Kai constructed the word "eternity" using pieces of ice as component...

2020-09-15

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C. Round Corridor

链接：https://codeforces.com/problemset/problem/1200/C Amugae is in a very large round corridor. The corridor consists of two areas. The inner area is e...

2020-09-15

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D2. RGB Substring (hard version)

链接：https://codeforces.com/contest/1196/problem/D2 The only difference between easy and hard versions is the size of the input. You are given a strin...

2020-09-15

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B. Views Matter

链接：https://codeforces.com/contest/1061/problem/B You came to the exhibition and one exhibit has drawn your attention. It consists of nn stacks of blo...

2020-09-15

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B. Pairs

链接：https://codeforces.com/problemset/problem/1169/B Toad Ivan has mm pairs of integers, each integer is between 11 and nn, inclusive. The pairs are (...

2020-09-15

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B. Beautiful Numbers

链接：https://codeforces.com/contest/1265/problem/B You are given a permutation p=[p1,p2,…,pn]p=[p1,p2,…,pn] of integers from 11 to nn. Let's call the n...

2020-09-15

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C. Beautiful Regional Contest

链接：https://codeforces.com/contest/1265/problem/C So the Beautiful Regional Contest (BeRC) has come to an end! nn students took part in the contest. T...

2020-09-15

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A. Beautiful String

链接：https://codeforces.com/contest/1265/problem/A A string is called beautiful if no two consecutive characters are equal. For example, "ababcb&q...

2020-09-15

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C. Friends and Gifts

链接：https://codeforces.com/contest/1283/problem/C There are nn friends who want to give gifts for the New Year to each other. Each friend should give ...

2020-09-15

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