UVA10907 Art Gallery

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=21&page=show_problem&problem=1848 [PDF](https://uva.onlinejudge.org/external/109/p10907.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10907/0c045fc0d0dc1bf967cc4ece61230464340d4ef0.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10907/a9427cc802d77317a471c1c3ce866bbbed897138.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10907/be58551dd86c2560e53da6c1f8cdda6ac08d7988.png)