UVA12466 Ancestors

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=279&page=show_problem&problem=3910 [PDF](https://uva.onlinejudge.org/external/124/p12466.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12466/49c92a8904fbf833da07e2fa7c6b2a917dfd8e13.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12466/f66129646288f622286e8d81e03773ea3d50aff9.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12466/2ccb2ecb0969d21b79aa13ee3a4e0deb425bb940.png)