#include <iostream>
using namespace std;
int main()
{ static int n;
int s=0;
cin>>n;
while(n!=1){
if(n%2==0){
n=n/2;
s++;
}else{
n=(3*n+1)/2;
s++;
}
}
cout << s<< endl;
return 0;
}
using namespace std;
int main()
{ static int n;
int s=0;
cin>>n;
while(n!=1){
if(n%2==0){
n=n/2;
s++;
}else{
n=(3*n+1)/2;
s++;
}
}
cout << s<< endl;
return 0;
}