#include <bits/stdc++.h>

using namespace std;

#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()

template<typename A, typename B> inline bool chmax(A &a, B b) { if (a<b) { a=b; return 1; } return 0; }
template<typename A, typename B> inline bool chmin(A &a, B b) { if (a>b) { a=b; return 1; } return 0; }

typedef unsigned long long ull;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const ll INF = 1ll<<29;
const ll MOD = 1000000007;
const double EPS  = 1e-10;

int ncr[10001][10001];

void nCr(ll n, ll r, ll mod) {
	REP(i, n + 1) {
		REP(j, i + 1) {
			if (j == 0 || j == i) ncr[i][j] = 1;
			else ncr[i][j] = (ncr[i - 1][j - 1] + ncr[i - 1][j]) % mod;
		}
	}
}

int main() {
	ll mod = 1000000000;
	ll n, m;
	cin >> n >> m;
	
	nCr(m, m, mod);
	
	n /= 1000;
	n %= m;
	
	cout << ncr[m][n] << endl;
	
	return 0;
}