UVA11867 Politeness

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=226&page=show_problem&problem=2967 [PDF](https://uva.onlinejudge.org/external/118/p11867.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11867/4d0b14f2086c3b324cc3a23b15261ac2b85b8002.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11867/abc6c6b9316d9c08974af5c29794386c23bd5f3c.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11867/67e44071dc256558ced375827b1cd649895dd3f8.png)