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

class P
{
    static int Search(int goal)
    {
        int x = path.Last();
        int step = Convert.ToString(x, 2).Replace("0", "").Length;
        int post = x + step;
        int pre = x - step;
        int count = 0;
        path.Add(post);

        if (x == goal)
        {
            return 1;
        }

        while (path.Count != 0 && count != path.Count)
        {
            if (x == goal)
            {
                return path.Count + 1;
            }
            else
            {
                x = path.Last();
                step = Convert.ToString(x, 2).Replace("0", "").Length;
                post = x + step;
                pre = x - step;

                if (!path.Contains(post) && 1 <= post && post <= goal)
                {
                    path.Add(post);
                }
                else if (!path.Contains(pre) && 1 <= pre && pre <= goal)
                {
                    path.Add(pre);
                }
                else
                {
                    count = path.Count;
                    path.Remove(x);
                }
            }
        }
        return -1;
    }

    static List<int> path = new List<int>() { 1 };

    static void Main()
    {
        Console.WriteLine(Search(int.Parse(Console.ReadLine())));
    }
}