#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <climits>
#include <cfloat>
#include <map>
#include <utility>
#include <set>
#include <iostream>
#include <memory>
#include <string>
#include <vector>
#include <algorithm>
#include <functional>
#include <sstream>
#include <complex>
#include <stack>
#include <queue>
#include <iomanip>
using namespace std;
#define INF 1e9
#define PI acos(-1)
typedef long long ll;

#define MOD 1000003

ll pow(ll a, ll x) {
	if (x == 0)return 1;
	if (x % 2 == 1) {
		return a * pow(a, x - 1)%MOD;
	}
	ll res = pow(a, x / 2);
	return res * res%MOD;
}

int main() {
	ll x, n;
	cin >> x >> n;
	ll ans = 0;
	vector<ll> a(n);
	for (int i = 0; i < n; i++)cin >> a[i];
	
	for (int i = 0; i < n; i++) {
		ans += pow(x, a[i]);
	}

	cout << ans % MOD << endl;

	return 0;
}