#include <iostream>

#define FORR(i,b,e) for(int i=(b);i<(int)(e);++i)
#define FOR(i,e) FORR(i,0,e)
#define dump(var) cerr << #var ": " << var << "\n"
#define dumpc(con) for(auto& e: con) cerr << e << " "; cerr<<"\n"

typedef long long ll;
typedef unsigned long long ull;

const ull MODD = 1e9;

using namespace std;

ull gcd(ull x, ull y) {
    while (y != 0) {
        ull t = x % y;
        x = y;
        y = t;
    }
    return x;
}

ull count_combinations(ull n, ull k) {
    ull r = 1;
    for(ull d = 1; d <= k; ++d, --n) {
        ull g = gcd(r, d);
        r /= g;
        ull t = n / (d / g);
        r = (r * t) % MODD;
    }
    return r;
}


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

    ll N;
    int M;
    cin >> N >> M;
    N /= 1000;
    N %= M;
    cout << count_combinations(M, N%M) << endl;

    return 0;
}