#include <iostream>
#include <cstdio>
#include <string>
#include <algorithm>
#include <utility>
#include <cmath>
#include <vector>
#include <stack>
#include <queue>
#include <deque>
#include <set>
#include <map>
#include <tuple>
#include <numeric>
#include <functional>
using namespace std;
typedef long long ll;
typedef vector<ll> vl;
typedef vector<vector<ll>> vvl;
typedef pair<ll, ll> P;
#define rep(i, n) for(ll i = 0; i < n; i++)
#define exrep(i, a, b) for(ll i = a; i <= b; i++)
#define out(x) cout << x << endl
#define exout(x) printf("%.10f\n", x)
#define chmax(x, y) x = max(x, y)
#define chmin(x, y) x = min(x, y)
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define pb push_back
#define re0 return 0
const int mod = 1000000000;
const ll INF = 1e16;

const int MAX_N = 10010;

int C[MAX_N][MAX_N];

void PascalTriangle() {
    rep(i, MAX_N) {
        C[i][0] = C[i][i] = 1;
    }
    exrep(i, 2, MAX_N-1) {
        exrep(j, 1, i-1) {
            C[i][j] = C[i-1][j] + C[i-1][j-1];
            C[i][j] %= mod;
        }
    }
}

int main() {
    ll n;
    int m;
    cin >> n >> m;

    PascalTriangle();

    ll x = (n - n / (1000*m) * (1000*m)) / 1000;

    out(C[m][x]);
    re0;
}