#include <iostream>
#include <vector>
using namespace std;
typedef long long ll;
const ll MOD = 1000003;

int powermod(ll a, ll b, ll MOD) {
    ll res = 1;
    while (b) {
        if (b & 1) {
            res *= a;
            res %= MOD;
        }
        a *= a;
        a %= MOD;
        b = b >> 1;
    }
    return (int)res;
}

int main() {
    int x, N;
    cin >> x >> N;
    vector<ll> a(N);
    for (int i = 0; i < N; ++i) cin >> a[i];

    int res = 0;
    for (int i = 0; i < N; ++i) {
        res += powermod(x, a[i], MOD);
        res %= MOD;
    }
    cout << res << endl;
}