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

namespace No003_ビットすごろく
{
    class Program
    {
        static private int N;
        static private int M;
        static private int[] Bit;
        static private List<int> Count = new List<int>();

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

            BitCheck();

            bool[] CheckerF = Enumerable.Repeat<bool>(false, M).ToArray();
            bool[] CheckerB = Enumerable.Repeat<bool>(false, M).ToArray();

            Recursive(1, 1, CheckerF, CheckerB);

            if (Count.Count == 0)
                Console.WriteLine(-1);
            else
                Console.WriteLine(Count.Min());
        }

        static void BitCheck()
        {
            M = (int)Math.Pow(2.0, Math.Log((double)N, 2.0) + 1.0);
            int[] log2 = new int[M];
            int temp, count;

            Bit = new int[M];

            log2[0] = 1;
            log2[1] = 1;

            Bit[0] = 0;
            Bit[1] = 1;

            temp = 1;
            count = 0;

            for (int i = 2; i <= N; i++)
            {
                log2[i] = (int)Math.Log((double)i, 2.0) + 1;
                if (log2[i] != temp)
                {
                    temp = log2[i];
                    count = 0;
                }
                Bit[i] = Bit[count] + 1;
                count++;
            }
        }

        static void Recursive(int level, int count, bool[] CheckerF, bool[] CheckerB)
        {

            if (level > M || level < 1)
                return;
            else if (level == N)
            {
                Count.Add(count);
                return;
            }

            if (!CheckerF[level])
            {
                CheckerF[level] = true;
                Recursive(level + Bit[level], count + 1, CheckerF, CheckerB);
            }

            if (!CheckerB[level])
            {
                CheckerB[level] = true;
                Recursive(level - Bit[level], count + 1, CheckerF, CheckerB);
            }

            return;
        }
    }
}