UVA541 Error Correction

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=7&page=show_problem&problem=482 [PDF](https://uva.onlinejudge.org/external/5/p541.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA541/931d80e7fc7b66083c0e50927f314feff1496c0b.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA541/01b28cf6f69a68a98a680b0b5944be58e13100f1.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA541/e78234f6abdc08d3fb7db85a62d2d6ee0793f557.png)