[题目](https://www.luogu.com.cn/problem/UVA11212)
by George1123 @ 2019-12-14 11:15:18
[用这个试一试？](https://vjudge.net/)
by QwQ蒟蒻wjr @ 2019-12-14 11:28:14
@[♗Wendigo♝](/user/118365)
请勿散布哲学
by JasonZRY @ 2019-12-14 11:33:33