UVA11971 多边形 Polygon

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=229&page=show_problem&problem=3122 [PDF](https://uva.onlinejudge.org/external/119/p11971.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11971/99d2d5d6a8ba382694bafd2fbbaac2ebd19403c3.png)

Input Format

N/A

Output Format

N/A