UVA13261 Between Ceiling and Floor

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=878&page=show_problem&problem=5184 [PDF](https://uva.onlinejudge.org/external/132/p13261.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13261/06117be033aa1ad55faa38e74ec8d9409b8e1a41.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13261/018b065d95e1731dc43540f6cf1f086033d7fa72.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13261/d6375484c7e22dc9346dbd3c3f136496798c6850.png)