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

public class Exercises16{
  public static void main (String[] args){

    Scanner sc = new Scanner(System.in);

    int goal = sc.nextInt();

    int carol = 1;

    int bitCount = 0;

    int count = 1;

    ArrayList<Integer> blocks = new ArrayList<Integer>();

    blocks.add(carol);

    while (carol != goal){
      bitCount = 0;
      int carolPresent = carol;

      while (carolPresent != 0){
        if (carolPresent % 2 == 1){
          bitCount++;
        }

        carolPresent /= 2;
      }

      if (carol + bitCount > goal){
        carol -= bitCount;
      }else{
        carol += bitCount;
      }

      if (blocks.indexOf(carol) != -1){
        System.out.println(-1);
        return;
      }else{
        blocks.add(carol);
      }

      count += 1;
    }

    System.out.println(count);
  }
}