UVA13181 Sleeping in hostels

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=871&page=show_problem&problem=5092 [PDF](https://uva.onlinejudge.org/external/131/p13181.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13181/845f735ebeabbf0ec3f38ff5547ed91bd85858ea.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13181/171774c1e08aee3a64e9ed16494ca32044bdf51e.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13181/6b52eb5615f0a86ec9fb4a05569798648aaa0d84.png)