UVA12485 Perfect Choir

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=279&page=show_problem&problem=3929 [PDF](https://uva.onlinejudge.org/external/124/p12485.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12485/6dd7ffac309103d307b63558c06e477e2234133b.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12485/34258f4deefd3b8de3c31614f18baea7de769e33.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12485/bb68dffbcc5c5294cf4d5ecf6e3e3caab3a54555.png)