UVA11991 Easy Problem from Rujia Liu?

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=229&page=show_problem&problem=3142 [PDF](https://uva.onlinejudge.org/external/119/p11991.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11991/9b3fc16bee6373da7ee17491912b2a1dc9de2698.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11991/c82940836d276c437975aaa3e5b4bb2d54c9eb64.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11991/8d3343d402abdb2535799d84d6f8befcc7d19521.png)