#include <iostream>
using namespace std;

const int mod = 1e9;
int main(void){
    long long n,m;
    cin >> n >> m;
    long long k = (n/1000)%m;
    long long before[10003], after[10003];
    before[0] = 1;
    if(k != 0){
        for(int i=1; i<=m; i++){
            for(int j=1; j<=i; j++){
                after[j] = (before[j-1]+before[j])%mod;
            }
            before[0] = 1;
            for(int j=1; j<=i; j++){
                before[j] = after[j];
            }
        }
    }
    cout << (before[k]%mod) << endl;
    return 0;
}