UVA10837 一个研究课题 A Research Problem

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=20&page=show_problem&problem=1778 [PDF](https://uva.onlinejudge.org/external/108/p10837.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10837/e3dcf80ab6b6a69d63cdff1e061940bbc0fe2a76.png)

Input Format

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Output Format

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