#include<stdio.h>
int main()
{
	   int n;
	   while(scanf("%d",&n)!=EOF)
	    {;
		int count=0;
		while(1)
		{
		if(n%2!=0)
		{
		n=3*n+1;
		count++; 
		}
		if(n%2==0)
		{
		n=n/2;
		count++;
		}
		if(n==1)
		{
			printf("%d\n",count%3);
			break;
		}
		}
      
		}
	
	}