#include <bits/stdc++.h>
#include <atcoder/all>


using namespace std;
using namespace atcoder;
#define rep(i,m,n,k) for (int i = (int)(m); i < (int)(n); i += (int)(k))
#define rrep(i,m,n,k) for (int i = (int)(m); i > (int)(n); i += (int)(k))
#define ll long long
#define list(T,A,N) vector<T> A(N);for(int i=0;i<(int)(N);i++){cin >> A[i];}

const ll mod = 1000000000;
using mint = static_modint<1000000000>;




int main(){
    
    ll N,M;
    cin >> N >> M;
    N /= 1000;
    N %= M;
    vector<vector<mint>> C(M+1,vector<mint>(M+1,mint(0)));
    rep(i,0,M+1,1){
        C[i][0] = mint(1);
    }
    rep(i,1,M+1,1){
        rep(j,1,i+1,1){
            C[i][j] = C[i-1][j-1] + C[i-1][j];
        }
    }
    cout << C[M][N].val() << endl;
    return 0;


}