UVA10570 外星人聚会 Meeting with Aliens

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=17&page=show_problem&problem=1511 [PDF](https://uva.onlinejudge.org/external/105/p10570.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10570/75eff127b98077cdef2c3b26c3fff44210406f63.png)

Input Format

N/A

Output Format

N/A