/*
 * 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>
#include <queue>

using namespace std;

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

int main() {

		main003();

	return 0;
}

inline int get_bit(int x) {

	int c = 0;

	while (x) {
		if (x & 1)
			c++;
		x >>= 1;
	}
	return c;
}

inline int main003() {

	int num;
	int route, v1, v2, bit_count;
	int result = 0;
	map<int, int> v;
	queue<int> q;

	cin >> num;

	q.push(1);

	v[1] = 1;

	while (!q.empty()) {

		route = q.front();
		q.pop();

		bit_count = get_bit(route);

		v1 = route + bit_count;
		v2 = route - bit_count;

		if (v1 == num) {
			result = v[route] + 1;
			break;
		}

		if ((v1 < num) && (v[v1] == 0 || v[route] + 1 < v[v1])) {
			v[v1] = v[route] + 1;
			q.push(v1);
		}

		if ((0 < v2) && (v[v2] == 0 || v[route] + 1 < v[v2])) {
			v[v2] = v[route] + 1;
			q.push(v2);
		}

	}

	if (result == 0) {
		cout << -1;
	} else {
		cout << result;
	}

	return 0;

}