#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
int calc(int x) {
	if (x == 1) {
		return 0;
	} 
	if (x & 1) {
		return calc(x + 1) + 1;
	} else {
		return calc(x / 2) + 1;
	}
}
signed main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	int n;
	cin >> n;
	cout << calc(n) << endl;
	return 0;
}