#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); i++)
using namespace std;
typedef long long ll;

ll C[10001][10001];

int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);
    
    ll N,M; cin >> N >> M;
    N = N / 1000;
    N %= M;
    ll MOD = 1e9;
    for(int i = 0; i <= M; i++) C[i][0] = C[i][i] = 1;
    for(int i = 1; i <= M; i++) {
        for(int k = 1; k < i; k++) {
            C[i][k] = (C[i - 1][k - 1] + C[i - 1][k]) % MOD;
        }
    }
    cout << C[M][N] << endl;
}