class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            int count = 1;
            int i = 1;
            while(i != n && i <= 10000)
            {
                count++;
                int move = BitCount(Convert.ToString(i, 2));
                if(i < n)
                {
                    i += move;
                }
                else
                {
                    i -= move;
                }
                
            }
            if (i == n)
            {
                Console.WriteLine(count);
            }
            else
            {
                Console.WriteLine(-1);
            }
        }

        private static int BitCount(string v)
        {
            int count = 0;
            for (int i = 0; i < v.Length; i++)
            {
                if (v[i] == '1')
                {
                    count++;
                }
            }
            return count;
        }
    }