UVA634 Polygon

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=8&page=show_problem&problem=575 [PDF](https://uva.onlinejudge.org/external/6/p634.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA634/ef202569030f472c1c634061243d8ab0226150f7.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA634/b020e3ddb599d412e50cdf4f61b470061a527074.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA634/1e6afd4054027fb4ff9efb710d69e17f4c9d9c02.png)