using System;

namespace No3
{
    class Program
    {
        private static int N;
        private static bool[] map;

        static void Main(string[] args)
        {
            N = int.Parse(Console.ReadLine());
            map = new bool[N];

            var result = Rec(0);
            Console.Write(result);
        }

        static int Rec(int index)
        {
            if (index == N - 1) return 1;
            if (index < 0) return -1;
            if (index >= N) return -1;
            if (map[index]) return -1;

            map[index] = true;

            var count = 0;
            for (var i = 0; i < 32; i++)
            {
                var tmp = 1 << i;
                if ((index + 1 & tmp) != 0) count++;
            }

            var front = Rec(index + count);
            var back = Rec(index - count);

            if (front == -1)
            {
                return back == -1 ? -1 : back + 1;
            }
            else
            {
                return back == -1 ? front + 1 : Math.Min(front, back) + 1;
            }
        }
    }
}