#define _CRT_SECURE_NO_WARNINGS
#include <cstdio>
#include <cstring>
#include <cmath>
#include <vector>
#include <list>
#include <string>
#include <set>
#include <map>
#include <queue>
#include <stack>
#include <algorithm>
#include <iostream>
#include <sstream>
using namespace std;
typedef pair<int, int> P;
typedef long long int llint;
const int INF = 10000000;
const llint LINF = 10000000000;
const llint MOD = 1000000000;

int main(){
	llint money,n;
	llint karia,karib;
	llint ans[100000];
	
	cin >> money;
	cin >> n;
	money = money - money % 1000;
	karia = 1000 * n;
	karib = money / karia;
	money = (money-karib*karia)/1000;
	ans[0] = 1;
	
	/*if (money == 1){
		ans[n] = n;
	}*/
	for (int i = 0; i < money; i++){
		ans[i + 1] = ans[i] * (n- i) / (i + 1);
	}
	ans[money] = ans[money] % MOD;

	 cout << ans[money];
	// cin >> n;

	 return 0;

}