【打CF，学算法——一星级】Codeforces 699A Launch of Collider (水题)

【CF简介】

题目链接：CF 699A

题面：

A. Launch of Collider

time limit per test

2 seconds

memory limit per test

256 megabytes

input

standard input

output

standard output

There will be a launch of a new, powerful and unusual collider very soon, which loc