typedef long long ll;
typedef long double ld;

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

#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
template<typename T>
using ordered_set = tree<T, null_type, std::less<T>, rb_tree_tag, tree_order_statistics_node_update>;
// std::cout << *s.find_by_order(1) << std::endl; // 2


const ll MOD = 1000000000;
signed main(){
    // これがないと落ちることがある
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    ll n;
    cin >> n;
    ll m;
    cin >> m;
    n-=n%1000;
    n/=1000;

    vector<vector<int>> dp(m+1, vector<int>(m+1));
    dp[0][0]++;
    for (ll i = 0; i < m; i++){
        for (ll j = 0; j <= m; j++){
            dp[i+1][j] += dp[i][j];
            if(j-1>=0)dp[i+1][j] += dp[i][j-1];
            dp[i+1][j] %= MOD;
        }
    }
    cout << dp[m][n%m] << endl;
}