import java.util.Scanner;

public class Main {
    static long MOD = 1000000000;

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        
        long N = sc.nextLong();
        int M = sc.nextInt();

        long val = (N - N%1000)/1000;
        val %= M;

        if (val > M/2) {
            val = M - val;
        }


        long ans = 1;
        for (int i=0; i<val; i++) {
            ans *= (M-i);
            ans %= MOD;
        }

        for (int i=1; i<=val; i++) {
            ans /= i;
        }

        System.out.println(ans);
    }
}