#include <bits/stdc++.h>
#define rep(i, a) rep2 (i, 0, a)
#define rep2(i, a, b) for (int i = (a); i < (b); i++)
#define repr(i, a) repr2 (i, 0, a)
#define repr2(i, a, b) for (int i = (b) - 1; i >= (a); i--)
#define asn(a, b, c) fill_n(&(b), sizeof(a) / sizeof(b), c)
using namespace std;
typedef long long ll;
const ll inf = 1e9;
const ll mod = 1e9 + 7;

ll modpow(ll a, ll b, ll mod) {
	ll res = 1;
	while (b) {
		if (b & 1) (res *= a) %= mod;
		(a *= a) %= mod;
		b /= 2;
	}
	return res;
}

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

	ll ans = 0;
	ll mod = 1e6 + 3;
	rep (i, N) {
		ll a;
		cin >> a;
		ans += modpow(x, a, mod);
		ans %= mod;
	}	
	cout << ans << endl;

	return 0;
}