UVA10817 校长的烦恼 Headmaster's Headache

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=20&page=show_problem&problem=1758 [PDF](https://uva.onlinejudge.org/external/108/p10817.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10817/c24e0f313b8218e5806c2cb38b65cc4cbe935f1e.png)

Input Format

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Output Format

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