UVA722 Lakes

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=9&page=show_problem&problem=663 [PDF](https://uva.onlinejudge.org/external/7/p722.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA722/388cccc6ca11688319f8550baa5d75480e529408.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA722/1396100b198029fc92f5c0734ad8965060efdd9a.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA722/4acc0e43a22e0df1ff0979a1b78f5293442f1961.png)