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

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

int main()
{
	int N; cin >> N;
	cout << solve(N) << endl;
    return 0;
}