UVA12071 Understanding Recursion

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=242&page=show_problem&problem=3223 [PDF](https://uva.onlinejudge.org/external/120/p12071.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12071/b53a8bab51b9cca83ff8532d6b83fd5faf4658eb.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12071/3aa35f1ae460702916287daa8d3123a5aef64aeb.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA12071/c666ccb154ab7d9b290ca1d53534a403cf631293.png)