UVA13051 Enchanted Forest

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=866&page=show_problem&problem=4949 [PDF](https://uva.onlinejudge.org/external/130/p13051.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13051/c929f8f7cdf299add2fd3c31375c5b8a20017ee7.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13051/0ae6e0a64f3668e33f4a9efefcb48d916ebed808.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13051/3af75b20b01fbe09722d462ddcaeb6581cb98580.png)