代码如下：

import java.util.Scanner;public class Main {    public static void main(String[] args) {        // TODO Auto-generated method stub        Scanner input = new Scanner(System.in);        int n = input.nextInt();        int count = 0;        while(n!=1){            count++;            if(n%2==0){                n=n>>1;            }else{                n=(3*n+1)>>1;            }        }        System.out.println(count);    }}