UVA809 Bullet Hole

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=10&page=show_problem&problem=750 [PDF](https://uva.onlinejudge.org/external/8/p809.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA809/c7b0730ffd67203db503c13f7c4dddc52484df4b.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA809/8eb211b2099b1899e075a66c2998d14ba011888d.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA809/a3600c006e79c3ddeea707ce517c697999dc00f0.png)