Problem B: 二叉树1-叶结点数量2

Problem B: 二叉树1-叶结点数量2

Time Limit: 1 Sec  Memory Limit: 128 MB
Submit: 262  Solved: 223
[Status] [Submit] [Creator:]

Description

已知一棵完全二叉树的节点个数为n，求该完全二叉树度的叶结点数 
(2<=n<=1000000000) 

Sample Input Copy 

5

Sample Output Copy 

3

HINT

输入样例2
100
输出样例2
50
[Submit][Status]