import java.util.*;

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

    Scanner sc = new Scanner(System.in);

    int goal = sc.nextInt();

    LinkedList<Block> queue = new LinkedList<Block>();

    ArrayList<Integer> beforeQueue = new ArrayList<Integer>();
    ArrayList<Integer> closed = new ArrayList<Integer>();

    boolean flag = false;

    closed.add(0);
    queue.offer(new Block(1, 1));

    while(queue.size() > 0){
      Block currentBlock;

      currentBlock = queue.poll();
      if (currentBlock.value == goal){
        System.out.println(currentBlock.count);
        flag = true;
        break;
      }

      Block forward = currentBlock.getForwardNum();
      Block back = currentBlock.getBackNum();
      if (beforeQueue.indexOf(forward.value) == -1 && forward.value <= goal){
        queue.offer(forward);
        beforeQueue.add(forward.value);
      }
      if (closed.indexOf(back.value) == -1){
        queue.offer(back);
        closed.add(back.value);
      }
    }
    if (queue.size() == 0 && flag == false){
      System.out.println(-1);
    }
  }
}

class Block {
  public int value;
  private int num;
  public int count;
  private int bitcount;

  Block (int newValue, int currentCount){
    value = newValue;
    num = newValue;
    count = currentCount;
    bitcount = 0;
  }

  public Block getForwardNum(){
    while (num != 0){
      if (num % 2 == 1){
        bitcount += 1;
      }
      num /= 2;
    }

    return new Block (value + bitcount, count + 1);
  }

  public Block getBackNum(){
    while (num != 0){
      if (num % 2 == 1){
        bitcount += 1;
      }
      num /= 2;
    }

    return new Block (value - bitcount, count + 1);
  }
}