import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int goal = sc.nextInt();
        sc.close();
        int moveCount = 1;
        int currentPos = 1;

        List<Integer> moveHistory = new ArrayList<Integer>();

        while (true) {
            if (goal == currentPos) {
                break;
            }
            if (moveHistory.contains(currentPos)) {
                moveCount = -1;
                break;
            }
            moveHistory.add(currentPos);

            // dice!
            int dice = int2bit1count(currentPos);
            if (goal > currentPos + dice) {
                currentPos += dice;
            } else {
                currentPos -= dice;
            }
            moveCount++;
        }

        System.out.println(moveCount);
    }

    public static int int2bit1count(Integer num) {
        String bitStr = Integer.toBinaryString(num);
        return bitStr.replace("0", "").length();
    }
}