UVA11188 奇怪的歌剧院 A Strange Opera House

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=23&page=show_problem&problem=2129 [PDF](https://uva.onlinejudge.org/external/111/p11188.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11188/ecbe0858966249eb29d043acf6643dbfefd52756.png)

Input Format

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Output Format

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