UVA13080 Piano keyboard

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=866&page=show_problem&problem=4978 [PDF](https://uva.onlinejudge.org/external/130/p13080.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13080/8121c11cffa5e3761aafc995b4fb834f603076b9.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13080/9ca676aa95bc9aff6d8545416d35ebaee452a887.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA13080/6604d47d25c029ba6ea9745e75cc8bf9a8d12010.png)