import java.util.*;

public class No3 {
    public static void main (String[] args) {
        Scanner scan = new Scanner(System.in);
        int N = scan.nextInt();
        int tmp = 1;
        int ans = 1;
        int mov;
        int loc = 1;

        while (true) {
            if (loc == N) break;
            mov = 0;
            while (tmp != 0) {
                mov += tmp & 1;
                tmp = tmp >> 1;
            }
            //System.out.println(ans);
            if (ans > N) {
                ans = -1;
                break;
            } else if (loc + mov < N + 1) loc += mov;
            else if (loc - mov > 0) loc -= mov;
            tmp = loc;
            ans ++;
        }
        System.out.print(ans);
    }
}