#include <iostream>
using namespace std;

const long long kMod = 1000000000;

long long CalcCombination(int n, int r) {
	int** dp = new int*[n + 1];
	for (int i = 0; i < n + 1; i++) {
		dp[i] = new int[i + 1];
		for (int j = 0; j < i + 1; j++) {
			if (j == 0 || j == i) {
				dp[i][j] = 1;
			}
			else {
				dp[i][j] = (dp[i - 1][j - 1] + dp[i - 1][j]) % kMod;
			}
		}
	}

	return dp[n][r];
}

int main() {
	int n, m;
	cin >> n >> m;

	int r = (n / 1000) % m;
	cout << CalcCombination(m, r) << endl;

	return 0;
}