UVA816 Abbott的复仇 Abbott's Revenge

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=10&page=show_problem&problem=757 [PDF](https://uva.onlinejudge.org/external/8/p816.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA816/815d09b7103ad071de9d9f7869315aa2585ea85b.png)

Input Format

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Output Format

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