#include <iostream>
#define two(x) x + x
using namespace std;

int main() {
	int num,i;
	int count = 0;
	int sum = 1;
	cin >> num;

	while (sum != num) {
		for (i = 0; i <= sum;i++) {
			if(two(sum - i) + i <= num){
				count++;
				sum = two(sum - i) + i;
				break;
			}
		}
	}

	cout << count << endl;
	return 0;
}