#include <iostream>

using namespace std;
using LL = long long;

constexpr int MOD = 1'000'003;

LL pow(LL, LL, LL);

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

    LL ans = 0;
    int a;
    for (int i = 0; i < N; i++) {
        cin >> a;
        ans += pow(x, a, MOD);
        ans %= MOD;
    }

    cout << ans << endl;
}

LL pow(LL a, LL b, LL m) {
    if (b == 0) return 1 % m;
    if (b == 1) return a % m;
    LL ret = pow(a, b / 2, m);
    ret = (ret * ret) % m;
    if (b % 2 == 1) ret = (ret * a) % m;
    return ret;
}