#include<iostream>
#include<algorithm>
using namespace std;

int mod = 1e9;
int m;
int dp[10010][10010];

void PascalsTriangle() 
{
	dp[1][1] = 1;

	for (int i = 2; i <= m + 1; i++) 
	{
		for (int j = 1; j <= i; j++) 
		{
			if (j > 1)
			{
				dp[i][j] = (dp[i - 1][j - 1] + dp[i - 1][j]) % mod;
			}
			else 
			{
				dp[i][j] = dp[i - 1][j] % mod;
			}
		}
	}
}

int main()
{
	long long n;

	cin >> n >> m;

	n = (n % (m * 1000)) / 1000;

	if (n == 0)
	{
		cout << 1 << endl;
		return 0;
	}

	PascalsTriangle();

	cout << dp[m + 1][min(n, m - n) + 1] << endl;
}