#include <iostream>
#include <algorithm>
#include <string>
#include <vector>
#include <math.h>

using ll = long long;
using namespace std;

const int MOD = 1e9+7;

int main() {
    int n, cnt = 0;
    cin >> n;
    while(n != 1) {
        if (n % 2 == 0) {
            n /= 2;
        }
        else {
            n++;
        }
        cnt++;
    }
    cout << cnt << endl;
    return 0;
}