#include <iostream>
#include <cstdio>
#include <algorithm>
#include <vector>
#include <map>

using namespace std;

const int mod = 1000000000;

int main() {
	long long n;
	int m;

	cin >> n >> m;

	n /= 1000;
	int atari = n - (n / m) * m;

	vector<int> pascal(m + 1, 0);
	pascal[0] = pascal[1] = 1;

	for (int i = 2; i <= m; i++) {
		for (int j = 1; j <= i; j++) {
			pascal[j] = (pascal[j - 1] + pascal[j]) % mod;
		}
	}

	cout << pascal[atari] << endl;
	return 0;
}