UVA11443 Tree in a Grid

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=26&page=show_problem&problem=2438 [PDF](https://uva.onlinejudge.org/external/114/p11443.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11443/5066ebf693637b5ad6de5ca4108b885f287cfd5a.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11443/a6bc14c6f55ff76dad1657465c1468ea6394ea7b.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11443/24b72252fe34ce2be1b16bd1e690a3a8acd25d21.png)