#include <bits/stdc++.h>
#define MOD 1000000000
#define MAX 10000
typedef long long ll;
using namespace std;

ll N, M;

ll dp[MAX][MAX];
ll nCr(ll n, ll r)
{
       if(n==r) return dp[n][r] = 1;
       if(r==0) return dp[n][r] = 1;
       if(r==1) return dp[n][r] = n;
       if(dp[n][r]) return dp[n][r];
       return dp[n][r] = nCr(n-1,r) + nCr(n-1,r-1);
}

int main(void){
    
    cin >> N >> M;
    
    ll noguchi = N / 1000;
    
    ll ans = 0;
    if(noguchi %= M){
        ans = nCr(M, noguchi) % MOD;
    }
    else ans = 1;
    
    cout << ans << endl;
    
    return 0;
}