#include<bits/stdc++.h>
using namespace std;
typedef pair<int, int> pii;


int n;
int f(int k) {
    if (k == 1)
        return 0;
    
    if (k%2 == 1)
        return f(k+1) + 1;
    else
        return  f(k/2) + 1;
    
    
}

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    /*
    int n, ans = 0;
    
    cin >> n;
    
    while (n > 1) {
        ans++;
        cout << n << endl;
        if (n % 2 == 1)
            n++;
        else
            n/=2;
        
    }
    cout << ans << endl;
     */
    cin >> n;
    cout << f(n);
}