UVA10227 Forests

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=14&page=show_problem&problem=1168 [PDF](https://uva.onlinejudge.org/external/102/p10227.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10227/bc8594ca21dae56c79dfe264627b59be5b4cf967.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10227/afc11d0c7462392a09917bc325133fdcc3562bcf.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10227/e2f6106452b278483830e00c52a31a031adb8f5a.png)