#include <fstream>

using namespace std;

int fact[5001];

int r(int a, int b) {
    int x = 1;
    while(b > 0) {
        if(b % 2 == 1) {
            b--;
            x = (1LL * x * a) % 2000003;
        }
        else {
            b /= 2;
            a = (1LL * a * a) % 2000003;
        }
    }
    return x;
}

int main()
{
    ifstream cin ("sandokan.in");
    ofstream cout ("sandokan.out");
    int n, k, i;
    long long x;
    cin >> n >> k;
    for(i = 1; i <= n; i++) {
        cin >> x;
    }
    n--;
    k--;
    for(i = 1; i * k <= n; i++) {
    }
    i--;
    k *= i;
    fact[0] = 1;
    for(i = 1; i <= n; i++) {
        fact[i] = (1LL * fact[i - 1] * i) % 2000003;
    }
    cout << (1LL * fact[n] * r((fact[n - k] * fact[k]) % 2000003, 2000001)) % 2000003;
    return 0;
}