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

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