UVA10285 最长的滑雪路径 Longest Run on a Snowboard

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=14&page=show_problem&problem=1226 [PDF](https://uva.onlinejudge.org/external/102/p10285.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10285/097238c73c2c94c933239ead196b1c720bd84b6b.png)

Input Format

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Output Format

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