UVA400 Unix ls命令 Unix ls

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=6&page=show_problem&problem=341 [PDF](https://uva.onlinejudge.org/external/4/p400.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA400/680cbafc296b2548dafcf7654cd4f9b2a8b61149.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA400/ca88eabc5a31ae17e3a421ed1148c554f807ccd2.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA400/1cf57bfedfe6e58a12f00c8b4d25eb0c73cd19b0.png)