UVA12662 Good Teacher

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=602&page=show_problem&problem=4400 [PDF](https://uva.onlinejudge.org/external/126/p12662.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12662/dfb971f2238ac7fd941a1856f759ce269c2f61d6.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12662/ab371d3fa5803b57cbcfdec98dfd42373277991c.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12662/f5233aa42046a43220c88c20229694608c90ac08.png)