#include <bits/stdc++.h>
using namespace std;
using ll = long long;

const int MOD = 1000003;
int intpow(int a, int b) {
    int ans = 1;
    while (b) {
        if (b & 1)
            ans *= a;
        a *= a;
        b /= 2;
    }
    return ans;
}

int main() {
    int N;
    ll x;
    cin >> x >> N;
    ll ans = 0;
    for (int i = 0; i < N; i++) {
        int a;
        cin >> a;
        ll ret = 1;
        ll b = x;
        while (a) {
            if (a & 1)
                (ret *= b) %= MOD;
            (b *= b) %= MOD;
            a /= 2;
        }
        (ans += ret) %= MOD;
    }
    cout << ans << endl;
}