UVA11913 Tape Recording

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=229&page=show_problem&problem=3064 [PDF](https://uva.onlinejudge.org/external/119/p11913.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11913/da10575dde8802e0448ad90f7ca309f0117be3d8.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11913/bd91c9a6d64f3a3c1b802eb6b5d0a8512281d178.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11913/4b11cdcc63d807ead9452ba540823d71b8bdf0d5.png)