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

namespace yukicoder
{
    class yc
    {
        static void Main()
        {
            //8192
            int N = int.Parse(Console.ReadLine());
            int cout = 1;
            int place = 1;
            int move = 0;
            int before = 0;
            bool end = false;

            while (!end)
            {
                for (int i = 8192; 0 < i; i /= 2)
                {
                    if ((place & i) != 0)
                    {
                        move++;
                    }
                }
                if (place == N)
                {
                    Console.WriteLine(cout);
                    break;
                }

                if (place + move > N)
                {
                    before = place;
                    place -= move;
                    cout++;
                }

                if (place + move <= N)
                {
                    place += move;
                    cout++;
                    if (place == before)
                    {
                        Console.WriteLine(-1);
                        break;
                    }
                    else
                    {
                        before = 0;
                    }
                }
                move = 0;
            }
        }
    }
}