UVA11716 Digital Fortress

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=117&page=show_problem&problem=2763 [PDF](https://uva.onlinejudge.org/external/117/p11716.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11716/28b52474d54f9f587978daf37da279dda755a66c.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11716/e65f9b43c540a51a0e49ef06d1469106eb4183a0.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11716/6dea497d6e38f220783c8d99267155d40bcc3df0.png)