#include <bits/stdc++.h>
#define p(s) cout<<(s)<<endl
typedef long long ll;
using namespace std;
const ll mod=1e9;

ll comb[10010][5010];
void combinationDP(int n){
	for(int i=0; i < n + 1; i++){
		for(int j=0; j < i + 1; j++){
			if(j==0 || i==j) comb[i][j]=1;
			else comb[i][j]=comb[i-1][j-1]+comb[i-1][j];
			comb[i][j]%=mod;
		}
	}
}
int main(){
	ll n,m;
	cin>>n>>m;
	ll dist=n/1000/m;
	ll r=n-dist*1000*m;
	r/=1000;
	r=min(r,m-r);
	combinationDP(m);
	p(comb[m][r]);
	return 0;
}