#include <iostream>

using namespace std;

int a = 0;
int check(int n){
    while(1){
        if(n%2 == 0){
            n = n/2;
            a++;
        }
        else break;
    }
    if(n == 1)return a;
    a++;
    check(n+1);
}

int main()
{
    int N;
   cin >> N;
   cout << check(N) <<endl;
   return 0;
}