HDU 3782 -Dragon Ball

 1 #include<stdio.h>

 2 #include<stdlib.h>

 3 int main()

 4 {

 5     int n,count;

 6     while(scanf("%d",&n)&&n!=0)

 7     {

 8        count=0;

 9        while(n>1)

10        {

11          if(n&1)  n=(n*3+1)>>1;

12          else n>>=1;

13          count++;

14        }

15        printf("%d\n",count);

16     }

17     system("pause");

18     return 0;

19 }