UVA11681 Tower for Cellular Telephony

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=78&page=show_problem&problem=2728 [PDF](https://uva.onlinejudge.org/external/116/p11681.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11681/7468ddd23d6466a2fd15871fcb408bf33d9a8e17.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11681/059c1e6434960c48cc570af0865c397dcec0cc37.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11681/e12ed8e8f3da2dd113514f237d8ad337fe28d1cc.png)