UVA13119 Castaways

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=871&page=show_problem&problem=5030 [PDF](https://uva.onlinejudge.org/external/131/p13119.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13119/a46b84f35c816f8ce581586670f4f1d40daaade2.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13119/d9aa783ec6a32d305722e6847b251f47dcae02eb.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13119/606cc4e144b979d5b94e7db007e6168c4eefc1ff.png)