UVA11216 Irrigation

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=24&page=show_problem&problem=2157 [PDF](https://uva.onlinejudge.org/external/112/p11216.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11216/a5aa59d580c04832a3fb13a72c2233ecc12b51e3.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11216/a2fc1ee73c21c9dc2db79bcb5c5ac63a872351c4.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11216/56616e4ac88328a927e8431fd69e83a9b8cdaa9b.png)