UVA12443 Quad

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=279&page=show_problem&problem=3874 [PDF](https://uva.onlinejudge.org/external/124/p12443.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12443/6f546c9acf97621398ab244837fa2007f1772480.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12443/51921c3daf0d942d7adba7059cb80a8103ab0fe6.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12443/7db02428bf66386ca74935c9da6c20fbc1265365.png)