UVA11069 A Graph Problem

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=22&page=show_problem&problem=2010 [PDF](https://uva.onlinejudge.org/external/110/p11069.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11069/0bca1a28beeec6d3fe46fe3badce638972a8ad68.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11069/37efcbf1f3530f5887633b134bb263afb2101ab4.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11069/f235834fc970c8be7f7bb6e76ca9ef0b3879ffc2.png)