UVA12931 Common Area

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=862&page=show_problem&problem=4810 [PDF](https://uva.onlinejudge.org/external/129/p12931.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12931/a435eca810f85f60beb0e3157333cc287e2a5f6b.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12931/b767f2897d91770df5ca5376effc844d736de754.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12931/8f54efc6ef3a739e9543eb994b0731df95336f97.png)