#include <cstdio>
int main(){
    int x;
    scanf("%d",&x);
    int res=0;
    while (x!=1){
        if (x&1) x=(3*x+1)>>1,res+=2;
        else x>>=1,++res;
    }
    printf("%d\n",res);
}

#include<iostream>
using namespace std;

int GetDepth(int x)
{

int Depth=0;
while(x!=1)
{
if(x%2==0)
x=x/2;
else
x=x*3+1;
Depth++;

}
return Depth;
}

int main()
{
int x; cin>>x;
int depth=GetDepth(x);
cout<<depth<<endl;
return 0;
}

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

}

#include <iostream>

using namespace std;
int main()
{
int a,b=0;
cin>>a;
while(a!=1)
{
if(a%2==0)
a=a/2;
else
a=a*3+1;
b++;
}

cout<<b;

return 0;
}