UVA11282 Mixing Invitations

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=24&page=show_problem&problem=2257 [PDF](https://uva.onlinejudge.org/external/112/p11282.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11282/110870a90869e55e6ec3515fe755ec5b158955d7.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11282/b4e7fdf072d0155249bf58edb79207686db0d3d3.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11282/47758b1841a784e0d76de0fe038a80510f818f87.png)