UVA448 OOPS!

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=6&page=show_problem&problem=389 [PDF](https://uva.onlinejudge.org/external/4/p448.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA448/140a3b8d6efbcdb34cc7a58e5418e9a6a00c932e.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA448/1df90b948b169db8437b0ecb8924f1bbc2315381.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA448/c4eb5fc72a17026f52b2e1151754e7123a194787.png)