UVA10977 Enchanted Forest

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=21&page=show_problem&problem=1918 [PDF](https://uva.onlinejudge.org/external/109/p10977.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10977/43c8253fd9e0f71083499c9657c87d8e72f0ea54.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10977/2f7c6ec660d74f105ae86810112094b36ebd2e31.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10977/5db88fb972ec0a27d2e7e600af8c3c2493bc2c0d.png)