import java.util.Scanner;
public class Main {
	
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        
        int N = sc.nextInt();
        int[] map = new int[N+1];
        for (int i = 1; i <= N; i++) {
        	map[i] = Integer.bitCount(i);
        }
        
        int ans = 1;
        int p = 1;
        while(p != N) {
        	if (p+map[p] == N) {
        		ans++;
        		break;
        	} else if (p+map[p] < N) {
        		p += map[p];
        		ans++;
        	} else if (p+map[p] > N && p-map[p] > 0) {
        		p -= map[p];
        		ans++;
        	} else {
        		ans = -1;
        		break;
        	}
        	
        	if (ans > 1000_000_000) {
        		ans = -1;
        		break;
        	}
        }
        System.out.println(ans);
    }
}