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

class Program
{
    static int CountBit(int n)
    {
        var cnt = 0;

        for (var i = 0; n > 0; i++)
        {
            if (n % 2 == 1) cnt++;
            n /= 2;
        }

        return cnt;
    }

    static void Main()
    {
        const int inf = 1145141919;

        var n = int.Parse(Console.ReadLine());

        var d = new int[n + 1].Select(x => inf).ToArray();
        var que = new Queue<int>();
        que.Enqueue(1);
        d[1] = 1;

        while (que.Count > 0)
        {
            var p = que.Dequeue();
            if (p == n) break;

            for (var i = 0; i < 2; i++)
            {
                var np = i == 0 ? p + CountBit(p) : p - CountBit(p);

                if (1 <= np && np <= n && d[np] == inf)
                {
                    que.Enqueue(np);
                    d[np] = d[p] + 1;
                }
            }
        }

        Console.WriteLine(d[n] == inf ? -1 : d[n]);
        return;
    }
}