#include <iostream>

using namespace std;

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

	int ans = 0;

	while (n != 1) {
		if (n % 2 == 1) {
			n++;
		} else {
			n /= 2;
		}
		ans++;
	}

	cout << ans << endl;
	return 0;
}