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

namespace YukiCoder_Cs
{
    class Program
    {
        public static void Main()
        {
            int N = int.Parse(Console.ReadLine());

            int move = 0;
            int cnt = 1;
            int i = 1;
            List<int> usedN = new List<int>();

            while (i < N)
            {
                move = Convert.ToString(i, 2).ToCharArray().Where(c => c == '1').Count();
                
                if (usedN.Contains(i))
                {
                    cnt = -1;
                    break;
                }
                usedN.Add(i);

                if (i + move > N)
                {
                    i -= move;
                }
                else
                {
                    i += move;
                }
                ++cnt;
            }

            Console.WriteLine($"{cnt}");
        }
    }
}