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

N/A

Output Format

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