UVA12747 Back to Edit Distance

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=823&page=show_problem&problem=4600 [PDF](https://uva.onlinejudge.org/external/127/p12747.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12747/19d9439796429a7c59e196155dbbc9f0862794f9.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12747/05d5d98b3ceaf16b7772c1ac06f817d03a71622d.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12747/05be521b27d525a60abf6df38b3e106dfe1a308a.png)