UVA10981 String Morphing

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=21&page=show_problem&problem=1922 [PDF](https://uva.onlinejudge.org/external/109/p10981.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10981/92e35023a4bdfa5e922646eacd17f02f24fb6861.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10981/641c2d51f4d92546bbc3a99099f5a53f0891ff30.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10981/ea07c7911ae53afaac608f03db65cc5f3c757c9b.png)