UVA10223 How many nodes ?

Description

[problemUrl]: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=14&page=show_problem&problem=1164 [PDF](https://uva.onlinejudge.org/external/102/p10223.pdf) ![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10223/506acdb7737715e25f06d09055957db1ef01a584.png)

Input Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10223/e774829d746619b48d8ca41ad44dcce004ccd85e.png)

Output Format

![](https://cdn.luogu.com.cn/upload/vjudge_pic/UVA10223/5916c35592438be300d3039af1d73c14634f184a.png)