#include<iostream>
#include<vector>
#include<bitset>
#include<algorithm>
#include<cmath>
#include<string>
using namespace std;
int main(){ 
    long long N;
    int ans;
    cin >> N;
    for(ans=0;N!=1;ans++){
        if(N%2==0)  N/=2;
        else    N++;
    }
    cout << ans << endl;
    return 0;
}