using System;
using System.Collections;

class Program
{
    static int N;
    static int[] Map = new int[10001];
    static void Main(string[] args)
    {
        N = int.Parse(Console.ReadLine());

        Map[1] = 1;
        Move();
        Console.WriteLine(Map[N] != 0 ? Map[N] : -1);
    }

    static void Move()
    {
        Queue q = new Queue();
        q.Enqueue(1);
        while(q.Count != 0)
        {
            int n = (int)q.Dequeue();
            int bit = BitCount(n);

            if (n + bit <= N && Map[n + bit] == 0)
            {
                Map[n + bit] = Map[n] + 1;
                q.Enqueue(n + bit);
            }

            if (0 < n - bit && Map[n - bit] == 0)
            {
                Map[n - bit] = Map[n] + 1;
                q.Enqueue(n - bit);
            }
        }
        
    }

    static int BitCount(int i)
    {
        i = i - ((i >> 1) & 0x55555555);
        i = (i & 0x33333333) + ((i >> 2) & 0x33333333);
        i = (i + (i >> 4)) & 0x0f0f0f0f;
        i = i + (i >> 8);
        i = i + (i >> 16);
        return i & 0x3f;
    }
}