UVA778 Recording a tape

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=9&page=show_problem&problem=719 [PDF](https://uva.onlinejudge.org/external/7/p778.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA778/38090efeb775b1fb9d99af83c2bcfdfd4c1e6b8c.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA778/4377fabfdfebeba0a810cbace8c660331fd8f000.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA778/1a073c0948a7de72512dccdde01d512c8b9116a2.png)