#include <bits/stdc++.h>
#define rep(i,n) for(int i=(0);i<(n);i++)

using namespace std;

typedef long long ll;
typedef unsigned long long ull;

template<class T> bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T> bool chmin(T &a, const T &b) { if (a>b) { a=b; return 1; } return 0; }

int main(){
	cin.tie(0);
	ios::sync_with_stdio(false);

	ll n, m;
	cin >> n >> m;

	n /= 1000;
	n %= m;

	ll MOD =  1e9;
	
	int max_m = 10101;
	ll c[2][max_m];
	rep(i, 2) rep(j, max_m) c[i][j] = 0;

	c[1][0] = c[1][1] = 1;
	for(int i = 2; i <= m; i++){
		rep(j, max_m) c[i%2][j] = 0;
		c[i%2][0] = c[i%2][i] = 1;
		for(int j = 1; j <= i - 1; j++){
			c[i%2][j] = c[(i-1)%2][j-1] + c[(i-1)%2][j];
			c[i%2][j] %= MOD;
		}
	}

	cout << c[m%2][n] << endl;
}