UVA12275 Sensor network

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=244&page=show_problem&problem=3427 [PDF](https://uva.onlinejudge.org/external/122/p12275.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12275/7b4b8da1139f1dbd3351f68f50312ff728c754ec.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12275/8d07c40c2d12e6b7a7f00ea4c1331d59cee36c65.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12275/de65e3b28b81e6a4a61bb6195c0d61185aba702c.png)