UVA11709 Trust groups

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=117&page=show_problem&problem=2756 [PDF](https://uva.onlinejudge.org/external/117/p11709.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11709/cbed2e5480ece58e07dd349637eeedc587d19b5c.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11709/06a35de18ea23eed26ef6b102e9f79f7e45291b8.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11709/e139c5954ce0459b1f0a841d6cbf43f7d5780a39.png)