using System;

​

public class Program

{

    public static void Main()

    {

        //var t = Console.ReadLine().Split();

        int a = 10;

        int b = 1000;

        Console.WriteLine(solve(a, b));

    }

​

    public static long solve(int a, int b)

    {

        long[] vals = new long[b + 1];

        for (int i = b; i >= a; i--)

        {

            if (i == b)

            {

                vals[i] = 1;

            }

            else if (i * 2 <= b)

            {

                vals[i] = vals[i * 2] + vals[i + 1];

            }

            else

            {

                vals[i] = vals[i + 1];

            }

        }

​

        return vals[a];

    }

}