using System;
using System.Collections.Generic;
using System.Linq;

public class Amatsuki
{
    public static void Main()
    {
        var target = int.Parse(Console.ReadLine());

        var pass = new int[0];
        var result = new List<int>();

        check(1, target, pass, ref result);

        if (result.Any())
        {
            Console.WriteLine(result.Count);
        }
        else
        {
            Console.WriteLine(-1);
        }
    }

    public static void check(int now, int target, int[] pass, ref List<int> result)
    {
        var passList = pass.ToList();
        if (passList.Contains(now)) { return; }

        passList.Add(now);

        if (now == target)
        {
            if(passList.Count < result.Count || result.Count == 0)
            {
                result = passList;
            }
        }

        var bit = bitCount(now);

        if (now + bit <= target)
        {
            check(now + bit, target, passList.ToArray(), ref result);
        }

        if (now - bit > 1)
        {
            check(now - bit, target, passList.ToArray(), ref result);
        }
    }

    public static int bitCount(int dec)
    {
        var result = 0;
        while (dec > 0)
        {
            if (dec % 2 == 1)
            {
                result++;
            }
            dec /= 2;
        }
        return result;
    }
}