UVA833 Water Falls

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=10&page=show_problem&problem=774 [PDF](https://uva.onlinejudge.org/external/8/p833.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA833/4e8c16ba1d54ea557d4952fd7d61c398428ab60f.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA833/da8b4d20f303f7e99ccbdfa01e75b13bd6b0e029.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA833/f08dfff08b16d3657f36048e46de8dc69c9752e8.png)