UVA12956 Curious Guardians

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=862&page=show_problem&problem=4835 [PDF](https://uva.onlinejudge.org/external/129/p12956.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12956/814517c70003bb9c86e125d564b731bbd575a94f.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12956/8a1c1bbbac9e8cecff9995de30c845edee3a9eba.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12956/0f6c607302f419d1fc52a2a189a70c1555ae1d5a.png)