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