UVA10187 From Dusk Till Dawn

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=13&page=show_problem&problem=1128 [PDF](https://uva.onlinejudge.org/external/101/p10187.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10187/a669c56c343ba8452e24e6ccdd995eba513f9f85.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10187/52eddb7188ec7638c16128d801e138424df90d11.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10187/e32dbda55c040c99752591429a90030a667c77a9.png)