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全部文章（共388篇）

Codeforces1004C——Sonya and Robots

Since Sonya is interested in robotics too, she decided to construct robots that will read and recognize numbers. Sonya has drawn n numbers in a row, ...

2021-04-05

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Codeforces999A——Mishka and Contest

Mishka started participating in a programming contest. There are n problems in the contest. Mishka’s problem-solving skill is equal to k. Mishka arra...

2021-04-05

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Codeforces999B——Reversing Encryption

A string s of length n can be encrypted by the following algorithm: iterate over all divisors of n in decreasing order (i.e. from n to 1), for each ...

2021-04-05

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Codeforces999C——Alphabetic Removals

You are given a string s consisting of n lowercase Latin letters. Polycarp wants to remove exactly k characters (k≤n) from the string s. Polycarp uses...

2021-04-05

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Codeforces999E——Reachability from the Capital

There are n cities and m roads in Berland. Each road connects a pair of cities. The roads in Berland are one-way. What is the minimum number of new r...

2021-04-05

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Codeforces1000A——Codehorses T-shirts

Codehorses has just hosted the second Codehorses Cup. This year, the same as the previous one, organizers are giving T-shirts for the winners. The va...

2021-04-05

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Codeforces1000B——Light It Up

Recently, you bought a brand new smart lamp with programming features. At first, you set up a schedule to the lamp. Every day it will turn power on at...

2021-04-05

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牛客练习赛24A——石子阵列

链接：https://www.nowcoder.com/acm/contest/157/A 来源：牛客网题目描述 xb有m种石子，每种无限个，Ta想从这些石子中取出n个，并按顺序排列起来，为了好看，相邻的石子不能相同。xb想知道有多少种排列的方法。输入描述: 第一行有两个正整数n，m。...

2021-04-05

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牛客练习赛24C——PH试纸

链接：https://www.nowcoder.com/acm/contest/157/c 来源：牛客网题目描述 PH试纸，是一种检测酸碱度的试纸，试纸红色为酸性，蓝色为碱性。 HtBest有一个PH试纸，试纸被分成了n段，每一段都可以被染色成红色或者蓝色，WHZ在试纸的每一段上都染为一种...

2021-04-05

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牛客练习赛24E——青蛙

链接：https://www.nowcoder.com/acm/contest/157/E 来源：牛客网题目描述有一只可爱的老青蛙，在路的另一端发现了一个黑的东西，想过去一探究竟。于是便开始踏上了旅途一直这个小路上有很多的隧道，从隧道的a进入，会从b出来，但是隧道不可以反向走。这只...

2021-04-05

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