#include <iostream>
#include <fstream>
#define MOD 2000003
using namespace std;
int n,k,p,c[5002][5002];

ifstream fin("sandokan.in");
ofstream fout("sandokan.out");

int main()
{
    fin >> n >> k;
    p = (n-1)%(k-1)+1;
    c[0][0] = 1;
    for(int i = 1; i <= n; i++){
        for(int j = 0; j <= i; j++){
            c[i][j] = (c[i-1][j]+c[i-1][j-1])%MOD;
        }
    }
    fout << c[n-1][p-1] << "\n";
    return 0;
}