UVA659 Reflections

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=8&page=show_problem&problem=600 [PDF](https://uva.onlinejudge.org/external/6/p659.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA659/93d864df3966c546a015ad187c0ddd2f9ce23d17.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA659/737bf1f7806310277dba93d51702de5dad975382.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA659/24438c107faa617e8ea8607771f37341dfccee84.png)