import java.math.*;
import java.util.*;

class Main {
	public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        long n = sc.nextLong();
        int m = sc.nextInt();
        long nokori = n/1000*1000-n/1000/m*1000*m;
        nokori/=1000;
        long ans = 1;
        BigInteger bigInteger = new BigInteger("1");
        for(int i=0;i<(int)nokori;i++){
        	bigInteger=bigInteger.multiply(new BigInteger(""+m).subtract(new BigInteger(""+i)));
        	bigInteger=bigInteger.divide(new BigInteger(""+(i+1)));
        }
        System.out.println(bigInteger.mod(new BigInteger("1000000000")));       
	}
}