UVA502 DEL command

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=7&page=show_problem&problem=443 [PDF](https://uva.onlinejudge.org/external/5/p502.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA502/e72a3300de1a6adb25fd63f200c28851069a85b3.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA502/929257c0bb75e47db8bdecd5bc79d7fc3d4ccdc8.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA502/dce7746e17c668fd6e22e401905639c76f80df99.png)