#include <stdio.h>
#include
#include
#include
#include
#include
using namespace std;
int n;
int main()
{
cin>>n;
int res=0;
while(n!=1)
{
if(n%2==0)
n=n/2;
else
n=(3*n+1)/2;
res++;
}
cout<<res;
return 0;
}
#include <stdio.h>
#include
#include
#include
#include
#include
using namespace std;
int n;
int main()
{
cin>>n;
int res=0;
while(n!=1)
{
if(n%2==0)
n=n/2;
else
n=(3*n+1)/2;
res++;
}
cout<<res;
return 0;
}