using System.Numerics;
using System;

public class Hello
{
    static void Main()
    {
        var n = long.Parse(Console.ReadLine().Trim());
        var m = int.Parse(Console.ReadLine().Trim());
        var t = (n / m / 1000) * 1000;
        var a = (n - t * m) / 1000;
        getAns(m, a);
    }
    static void getAns (int m, long a)
    {
        BigInteger x = 1;
        BigInteger x2 = 1;
        var y2 = a;
        for (int i = 0; i < a; i++)
        {
            x *= m--;
            x2 *= y2--;
        }
        var ans = (x / x2) % 1000000000;
        Console.WriteLine(ans) ;
    }
}