#include <iostream>
#include <string>
#include <utility>
#include <algorithm>
#include <map>
#include <set>
#include <vector>
#include <cmath>
#include <cstdlib>
#include <queue>
#include <stack>
#include <iomanip>

using namespace std;

#define REP(i, n) for(ll i = 0;i < n;i++)
#define REPR(i, n) for(ll i = n;i >= 0;i--)
#define FOR(i, m, n) for(ll i = m;i < n;i++)
#define FORR(i, m, n) for(ll i = m;i >= n;i--)
#define REPO(i, n) for(ll i = 1;i <= n;i++)
#define ll long long
#define INF (ll)1 << 60
#define MINF (-1 * INF)
#define ALL(n) n.begin(),n.end()
#define MOD 1000000007
#define P pair<ll, ll>

ll mod = 1000003;
ll powmod(ll a, ll b) {
	a %= mod;
	ll res = 1;
	while (b > 0) {
		if (b % 2 == 1)res = res * a % mod;
		a = a * a % mod;
		b /= 2;
	}
	return res;
}

ll x, n, ans = 0;
int main() {
	cin >> x >> n;
	REP(i, n) {
		ll a;
		cin >> a;
		ans += powmod(x, a);
		ans %= mod;
	}
	cout << ans << endl;
}