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

#define rep(i,n) for (int i=0;i<(n);i++)
#define rep2(i,a,b) for (int i=(a);i<(b);i++)
#define rrep(i,n) for (int i=(n)-1;i>=0;i--)
#define rrep2(i,a,b) for (int i=(b)-1;i>=(a);i--)
#define all(a) (a).begin(),(a).end()

typedef long long ll;
typedef pair<int, int> P;
typedef vector<int> vi;
typedef vector<P> vp;
typedef vector<ll> vll;

const ll mod = 1000003;

ll powmod (ll a, ll p) {
	ll ret = 1;
	ll mul = a;
	for (; p > 0; p >>= 1, mul = (mul * mul) % mod) {
		if ((p & 1) == 1) ret = (ret * mul) % mod;
	}
	return ret;
}

signed main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(0);

    ll x, N;
    cin >> x >> N;
    vll a(N);
    rep(i, N) cin >> a[i];

    ll ans = 0;
    rep(i, N) {
        ans += powmod(x, a[i]);
        ans %= mod;
    }

    cout << ans << endl;
}