UVA790 Head Judge Headache

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=9&page=show_problem&problem=731 [PDF](https://uva.onlinejudge.org/external/7/p790.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA790/a5fe6ae2985db35198306e2bffba7e5d73d83bfe.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA790/12f4caef6840fa04dbe15a8288959e1651aef04a.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA790/862ac6b8aca2258ade89506643e21605d00418de.png)