import java.util.*;

public class Main {
    static final int MOD = 1000000000;
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        long n = sc.nextLong() / 1000;
        int m = sc.nextInt();
        int[][] comb = new int[m + 1][m + 1];
        for (int i = 0; i <= m; i++) {
            for (int j = 0; j <= i; j++) {
                if (j == 0 || j == i) {
                    comb[i][j] = 1;
                } else {
                    comb[i][j] = (comb[i - 1][j - 1] + comb[i - 1][j]) % MOD;
                }
            }
        }
        System.out.println(comb[m][(int)(n % m)]);
    }
}