UVA11027 Palindromic Permutation

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=22&page=show_problem&problem=1968 [PDF](https://uva.onlinejudge.org/external/110/p11027.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11027/94e803daa3aceb2342279cadd96aa98ee49e3a41.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11027/331ecc966533da6d8c60517168bb90d39ecde184.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11027/327f13374674b84c1e3bc07bc7d96ec2b47aae75.png)