UVA12974 Exquisite Strings

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=862&page=show_problem&problem=4853 [PDF](https://uva.onlinejudge.org/external/129/p12974.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12974/8a90bfa3c399adc0690e64125cafb0357bae09e2.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12974/335d3ed3f6333d05c85dc267c930e3d0f6cb68b2.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12974/344cf536b7289dd3b3dbaaf03bcbc588cb70fb7b.png)