#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cstdio>
#include <cstring>
#include <cmath>
using namespace std;

int main() {
    int n;
    cin >> n;

    int k = 0;
    while (n != 1) {
        if (n & 1) {
            n++;
        } else {
            n /= 2;
        }
        k++;
    }

    cout << k << endl;

    return 0;
}