UVA11774 Doom's Day

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=117&page=show_problem&problem=2874 [PDF](https://uva.onlinejudge.org/external/117/p11774.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11774/7559861b780528edc06154b53c422381a3573154.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11774/9a3f61e763291fbc16d9a4c634805f0d3d4031a5.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11774/bed823e3537fed70d58cbc63e8020c675a54faad.png)