UVA10833 Lunar Forest

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=20&page=show_problem&problem=1774 [PDF](https://uva.onlinejudge.org/external/108/p10833.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10833/1a25c37319012e0df5b3048f7278c7bc3814cb4c.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10833/23a3c6e80daa2c9d66a03ef7b608abddeb68a4d9.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10833/8853f55b3ab78f5f5369a62e787553c95e393234.png)