# 标签：Codeforces

## Codeforces Round #439 (Div. 2) A-C题解

10月07日

Rock… Paper! After Karen have found the deterministic winning (losing?) strategy for...

## Codeforces Round #438 by Sberbank and Barcelona Bootcamp (Div. 1 + Div. 2 combined) A-C题解

10月05日

As technologies develop, manufacturers are making the process of unlocking a phone as user...

09月27日

## Codeforces Round #436 (Div. 2) A-D题解

09月27日

Petya and Vasya decided to play a game. They have n cards ( n ...

## Codeforces Round #435 (Div. 2) A-C题解+D代码

09月21日

Dr. Evil kidnapped Mahmoud and Ehab in the evil land because of their performance in the E...

## Codeforces Round #434 (Div. 1, based on Technocup 2018 Elimination Round 1) A-C题解

09月18日

For a given positive integer n denote its k -rounding as t...

09月07日

## Codeforces Round #430 (Div. 2) 签到题

09月01日

Kirill plays a new computer game. He came to the potion store where he can buy any potion....

## codeforces100345I——Segment Transformation

08月31日

1、题意：小C有一个DNA序列 s，可能有 A, C, G, T 四种字符。 现在他想通过一系列操作，把 s 变成 t。保证 s 和 t 长度相等。 字符可以进化...

## codeforces100215A——Brackets

08月31日

1、题意：给一个括号序列，包括”“四种字符，求最长的子串满足该子串是合法括号序列。 2、分析：用一个栈模拟过去，以 ...

## Codeforces 785D – Anton and School – 2（范德蒙恒等式+逆元）

08月25日

As you probably know, Anton goes to school. One of the school subjects that Anton studies...

## Educational Codeforces Round 27 A—D 题解

08月23日

Berland annual chess tournament is coming!Organizers have gathered 2·n chess...

## codeforces Masha and geometric depression（set模拟，等比数列）

08月21日

Masha really loves algebra. On the last lesson, her strict teacher Dvastan gave she new ex...

## Codeforces Round #429 (Div. 2) A-C题解

08月20日

One day Kefa found n baloons. For convenience, we denote color of i -th baloon as ...

## Codeforces Round #428 (Div. 2) 题解 (蓝 -> 紫)

08月13日

At first, Arya and Bran have 0 Candies. There are n days, at the ...

## Educational Codeforces Round 26 D Round Subset

08月05日

Let’s call the roundness of the number the number of zeros to which it ends. ...

## Codeforces 798D Mike and distribution (构造 + 脑洞 推荐)

08月03日

Mike has always been thinking about the harshness of social inequality. He’s so obs...

## Codeforces 798C Mike and gcd problem (贪心)

08月03日

Mike has a sequence A = [ a 1 , a 2 , …, a n ] of length n . He considers th...

07月14日

07月14日

07月14日

07月14日

## Codeforces 818B Permutation Game

07月01日

n children are standing in a circle and playing a game. Children’s numbers in clock...

|