UVA115 Climbing Trees

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=3&page=show_problem&problem=51 [PDF](https://uva.onlinejudge.org/external/1/p115.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA115/aa729e18889636396a1bdb484ea6b1364f0459b5.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA115/c972d9fbbfd162927ac54908d1160e32a33903a9.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA115/16a3ee706a4be080866bb34e945ba23615913f3c.png)