UVA10672 Marbles on a tree

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=18&page=show_problem&problem=1613 [PDF](https://uva.onlinejudge.org/external/106/p10672.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10672/6f913f90e777c2d37fb02967c120294ca85f28c3.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10672/63f746d7ed750cef254af2ef90bd415e438ad8d1.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10672/4560384a8bbf785323bb38661eda664f7291a60a.png)