UVA13016 Black Vienna

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=866&page=show_problem&problem=4904 [PDF](https://uva.onlinejudge.org/external/130/p13016.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13016/b3da00b58f71c9a1881bb694b5d70d3d074b7c0f.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13016/0c6cd18b0fb4c8367490b79adeb08ab2383f59a6.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13016/e3e605790dcadb4aed977c7a8a4b1d435e514337.png)