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

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());
            int[] map = new int[N + 1];
            map[1] = 1;
            Queue<int> q = new Queue<int>();
            q.Enqueue(1);
            while (q.Count > 0)
            {
                int count = 0;
                int search = q.Dequeue();
                int step = map[search];
                string strR = Convert.ToString(search, 2);
                char[] cR = new char[strR.Length];
                for (int i = 0; i < strR.Length; i++)
                {
                    cR[i] = strR[i];
                }

                for (int i = 0; i < cR.Length; i++)
                {
                    if (cR[i].ToString() == "1")
                    {
                        count++;
                    }
                }
                int[] node = new int[2];
                node[0] = search - count;
                node[1] = search + count;

                foreach (int next in node)
                {
                    if (1 >= next || next > N)
                    {
                        continue;
                    }
                    if (map[next] == 0 || map[next] > step + 1)
                    {
                        map[next] = step + 1;
                        q.Enqueue(next);
                    }
                }
            }
            if (map[N] == 0)
            {
                Console.WriteLine(-1);
            }
            else
            {
                Console.WriteLine(map[N]);
            }
        }
    }
}