#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
#define REP(i, n) for (int i = 0; i < (n); ++i)
#define REPR(i, n) for (int i = n - 1; i >= 0; --i)
#define FOR(i, m, n) for (int i = m; i < n; ++i)
#define FORR(i, m, n) for (int i = m; i >= n; --i)
#define ALL(v) (v).begin(),(v).end()
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }
const ll INF=1LL<<60;
const int inf=(1<<30)-1;
const int mod=1e9;
int dx[8]={1,0,-1,0,-1,-1,1,1};
int dy[8]={0,1,0,-1,-1,1,-1,1};
const int nmax=10001;
vector<vector<int>> c(nmax,vector<int>(nmax,-1));
int com(int a,int b){
  if(c[a][b]>=0){
    return c[a][b];
  }
  if(a==b||b==0){
    return 1;
  }
  if(a<b||a<0){
    return 0;
  }
  return c[a][b]=(com(a-1,b-1)+com(a-1,b))%mod;
}
int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    ll n,m;cin >> n >> m;
    n/=1000;
    ll d=n%m;
    cout << com(m,d) << endl;
}