UVA11131 Close Relatives

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=23&page=show_problem&problem=2072 [PDF](https://uva.onlinejudge.org/external/111/p11131.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11131/8650640534fd12ff154f31ce84182ecb9da6e04f.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11131/135976e3e3cd31be2509292e910f5fc1e85895c1.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11131/eeb906707c4cffc54b5411d35333fe753495e2f3.png)