import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    long MOD = (long)Math.pow(10, 9);
    long[][] dp = new long[10001][10001];
    dp[0][0] = 1;
    for(int i = 1; i < 10001; i++) {
      dp[i][0] = 1;
      for(int j = 1; j <= i; j++) {
        dp[i][j] = (dp[i - 1][j] + dp[i - 1][j - 1]) % MOD; 
      }
    }
    long N = sc.nextLong();
    long M = sc.nextLong();
    N /= 1000;
    long r = N % M;
    System.out.println(dp[(int)M][(int)r]);
  }
}