UVA10728 Help!

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=19&page=show_problem&problem=1669 [PDF](https://uva.onlinejudge.org/external/107/p10728.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10728/a796146255930bd3113304260da899e84cb08c03.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10728/9d5677f04e55e6d8671c0ead8eb11c8241ab12cf.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10728/ff798d8233f4de8fd103850702e7c41f50ae838f.png)