UVA999 Book signatures

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=11&page=show_problem&problem=940 [PDF](https://uva.onlinejudge.org/external/9/p999.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA999/48b150a823489fe67ffd335e8b88dc3b52e4fa03.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA999/42278a312097e1a3ae5458f2525c7fa2de9a51d9.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA999/99168c978dec7a2db9e86deecf42b1927334d91f.png)