#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
typedef long long ll;
const int mod = 1e9;
int main(){
	ll N, K;
	cin >> N >> K;

	N %= K * 1000;
	N /= 1000;

	ll dp[2][10001] = { { 0 } };

	for (int i = 1; i <= K; i++){
		dp[i & 1][0] = dp[i & 1][i] = 1;
		for (int j = 1; j < i; j++){
			dp[i & 1][j] = (dp[(i + 1) & 1][j - 1] + dp[(i + 1) & 1][j])%mod;
		}
	}

	cout << dp[K & 1][N] << endl;
	return 0;
}