/*
 * main.cpp
 *
 *  Created on: 2017/10/06
 *      Author: sep
 */

#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <string>
#include <cmath>
#include <cstring>
#include <vector>
#include <algorithm>
#include <map>

using namespace std;

inline int main003();
inline int main2();
inline int main3();
inline int main4();

int main() {

	main003();

	return 0;
}

inline unsigned char get_bit(unsigned int x) {

	unsigned int i;
	unsigned char c = 0;

	for (i = 1; i < (1 << 16); i <<= 1)
		if ((x & i) == i)
			c++;

	return c;
}

inline int main003() {

	unsigned int num, route;
	int c;
	map<int, int> r;
	cin >> num;
	map<int, int>::iterator itr;

	route = 1, c = 1;

	r[route] = 1;

	while (route != num) {

		c++;

		if (route + get_bit(route) <= num) {
			route += get_bit(route);
			r[route] = 1;
		} else {

			route -= get_bit(route);

			if ((route > num) || ((itr = r.find(route)) != r.end())) {
				c = -1;
				break;
			}
			r[route] = 1;

		}

	}

	cout << c;

}