UVA12456 Mirror codes

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=279&page=show_problem&problem=3887 [PDF](https://uva.onlinejudge.org/external/124/p12456.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12456/42649ab203939fc9034d5cf8c934cd60494aba20.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12456/04e999b402291012d00b63629e1a87fc4a81878a.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12456/a4eb2003eea6067980cc1ec2067e3a2b3ac7db2b.png)