UVA11162 Independent Attacking Zones

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=23&page=show_problem&problem=2103 [PDF](https://uva.onlinejudge.org/external/111/p11162.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11162/e6168bd1e50537861b7a8a41926a74458b1ecf2d.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11162/b96e187ed70777c6b5a654ce13a63b6bee67a43d.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11162/f2bcd7a0888cb2c6ecad615965a4574c2d7ad9c1.png)