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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...

2020-05-28

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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...

2020-05-28

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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 (...

2020-05-28

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C 选择颜色

链接：https://ac.nowcoder.com/acm/contest/3211/C 题目描述 n个人排成一个环形，每个人要从c种颜色中选择一个。牛牛希望相邻的人选择的颜色是不同的问有多少种方案。输出方案数对10007取模的结果。人是有顺序的，环旋转同构算不同的方案。 ...

2020-05-28

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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...

2020-05-28

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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...

2020-05-28

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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...

2020-05-28

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B. A and B

链接：https://codeforces.com/problemset/problem/1278/B You are given two integers aa and bb. You can perform a sequence of operations: during the first ...

2020-05-28

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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 ...

2020-05-28

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D. Christmas Trees

链接：https://codeforces.com/contest/1283/problem/D There are nn Christmas trees on an infinite number line. The ii-th tree grows at the position xixi. ...

2020-05-28

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