UVA12535 圆周上的三角形 Probability Through Experiments

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=441&page=show_problem&problem=3980 [PDF](https://uva.onlinejudge.org/external/125/p12535.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12535/0a47243bec2662c630cdaebacd1b838a2b28ce25.png)

Input Format

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Output Format

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