Matches

题目描述

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=25&page=show_problem&problem=2370 [PDF](https://uva.onlinejudge.org/external/113/p11375.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11375/e7863d18429cbe12d198f1b7dc1d48f16adde454.png)

输入输出格式

输入格式

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11375/83b766ccde1a47ddbf98ca05d908921a9fbb6207.png)

输出格式

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11375/046a815b73fc841c5884213263815c46ca37454b.png)

输入输出样例

输入样例 #1

3
4

输出样例 #1

2
4