UVA11688 Rotate to root

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=78&page=show_problem&problem=2735 [PDF](https://uva.onlinejudge.org/external/116/p11688.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11688/67340c8b25906751181c2356c9f5361e1226444d.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11688/aa8cee1ff32aae521aa1c62fb152fa7a6df42572.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA11688/19b5611e75c761a78eeba9ea5cb6136300377a28.png)