#include <bits/stdc++.h>

using namespace std;

#define MOD 1000003LL

typedef long long ll;

ll p(ll x, ll n)
{
    if (n == 0) return 1;
    ll res = p(x * x % MOD, n / 2) % MOD;
    if (n & 1) res *= x;
    return res % MOD;
}

int main()
{
    ll x, N; cin >> x >> N;
    ll sum = 0;

    for (ll i = 0; i < N; ++i) {
        ll n; cin >> n;
        sum += p(x, n);
        sum %= MOD;
    }

    cout << sum << endl;
}