UVA13231 Catch the Rats

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=878&page=show_problem&problem=5154 [PDF](https://uva.onlinejudge.org/external/132/p13231.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13231/b85f28dbfb4b88e51430c06049507d85a87bfff5.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13231/3458c85dea4a37624c0042c44c5d368bbc28f120.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13231/c4ad42ffecf3da11ccc523b1ffc3833aa3504cf4.png)