#include <iostream>
#include <algorithm>
#include <sstream>
#include <cstdio>

using namespace std;

#define COMBSZ 10001
#define MOD 1000000000LL
typedef long long LL;

int main(int argc, char *argv[])
{
	static LL C[COMBSZ][COMBSZ] = { 1 };

	string s;
	getline(cin, s);
	LL N, M;
	stringstream ss(s);
	ss >> N;
	getline(cin, s);
	M = atoi(s.c_str());
	N /= 1000;
	N %= M;

	for (LL i = 1; i <= M; ++i) {
		C[i][0] = 1;
		for (LL j = 1; j <= i; ++j) {
			C[i][j] = (C[i - 1][j - 1] + C[i - 1][j]) % MOD;
		}
	}

	LL ans = C[M][M-N];
	cout << ans << endl;
	return 0;
}