using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace foryuki
{
    class Program
    {
        static void Main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());
            int[] m = new int[N + 1];
            m[1] = 1;
            for (int i = 2; i < N + 1; i++)
            {
                m[i] = int.MaxValue;
            }
            var li = new List<int>();
            li.Add(1);

            while (li.Count() != 0)
            {
                int bit = Convert.ToString(li[0], 2).Where(x => x == '1').Count();

                if (li[0] - bit >= 1)
                {
                    if (m[li[0] - bit] > m[li[0]] + 1)
                    {
                        li.Add(li[0] - bit);
                        m[li[0] - bit] = m[li[0]] + 1;
                    }
                }

                if (li[0] + bit <= N)
                {
                    if (m[li[0] + bit] > m[li[0]] + 1)
                    {
                        li.Add(li[0] + bit);
                        m[li[0] + bit] = m[li[0]] + 1;
                    }
                }

                li.RemoveAt(0);
            }

            if (m[N] == int.MaxValue)
            {
                Console.WriteLine(-1);
            }
            else
            {
                Console.WriteLine(m[N]);
            }

        }

        //-------------------------------------------------------------

        static int[] ConvertStringArrayToIntArray(string[] array)
        {
            return Array.ConvertAll(array, str => int.Parse(str));
        }

        static List<int> ConvertStringArrayToIntList(string[] str)
        {
            var list = new List<int>();
            foreach (var c in str) list.Add(int.Parse(c));
            return list;
        }
    }
}