UVA830 Shark

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=10&page=show_problem&problem=771 [PDF](https://uva.onlinejudge.org/external/8/p830.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA830/580b3923558ae42cad1c6f5aa2f7c773c843d190.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA830/a404880bb7e005299c12d74d1e9c0271008218cc.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA830/e5368dab0ce619c914659fe8ab2a545e5d0fa789.png)