UVA796 Critical Links

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=9&page=show_problem&problem=737 [PDF](https://uva.onlinejudge.org/external/7/p796.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA796/ec8f587dead777bc5ee0091eca2b1b714b92fb24.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA796/c300018565c9b873a898dccee22f7d326e76df4d.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA796/9031c12c4d851da8c17408cca56f459ffc78052b.png)