#include<bits/stdc++.h>
using namespace std;

typedef long long int ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<pair<int, int> > vii;
#define rrep(i, m, n) for(int (i)=(m); (i)<(n);  (i)++)
#define erep(i, m, n) for(int (i)=(m); (i)<=(n); (i)++)
#define  rep(i, n)    for(int (i)=0; (i)<(n);  (i)++)
#define  rev(i, n)    for(int (i)=(n)-1; (i)>=0; (i)--)
#define erev(i, m, n) for(int (i)=(n); (i)>=m; (i)--)
#define vrep(i, c)    for(__typeof((c).begin())i=(c).begin(); i!=(c).end(); i++)
#define  ALL(v)       (v).begin(), (v).end()
#define mp            make_pair
#define pb            push_back
template<class T1, class T2> inline void minup(T1& m, T2 x){ if(m>x) m=static_cast<T2>(x); }
template<class T1, class T2> inline void maxup(T1& m, T2 x){ if(m<x) m=static_cast<T2>(x); }

#define INF 1000000000
#define MOD 1000000000
#define EPS 1E-12

const int MAX_M = 10000;
ll n, m;
ll dp[MAX_M+1][MAX_M+1];

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

  n =  (n - n / 1000LL / m * 1000 * m) / 1000;

  dp[0][0] = 1LL;
  erep(i, 0, m) erep(j, 0, i) dp[i+1][j+1] = (dp[i][j] + dp[i][j+1]) % MOD;

  cout << dp[(int)m+1][(int)n+1] << endl;

  return 0;
}