#include <iostream>

using namespace std;
typedef long long ll;

const ll MOD = 1000003;

ll calc_pow(ll x, ll pow) {
    if (pow == 0) return 1;
    ll a = calc_pow(x, pow / 2);
    a = a * a % MOD;
    if (pow % 2 == 1) a *= x;
    return a % MOD;
}

int main() {
    int x, n;
    cin >> x >> n;

    ll ret = 0;
    for (int i = 0; i < n; i++) {
        int a;
        cin >> a;
        ret += calc_pow(x, a), ret %= MOD;
    }

    cout << ret << endl;
    return 0;
}