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];
            for (int i = 1; i < N + 1; i++)
            {
                m[i] = -1;
            }

            int k = 1;
            int cnt = 1;
            int bit;
            while (true)
            {
                if (k == N)
                {
                    Console.WriteLine(cnt);
                    return;
                }
                m[k] = cnt;
                bit = Convert.ToString(k, 2).Where(x => x == '1').Count();

                if (k + bit < N + 1 && m[k + bit] == -1)
                {

                    k = k + bit;
                }
                else
                {
                    k = k - bit;
                    if (k < 1)
                    {
                        Console.WriteLine(-1);
                        return;
                    }
                    if (m[k] !=-1)
                    {
                        cnt = m[k];
                    }
                }
                cnt++;
            }
        }



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

        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;
        }
    }
}