#include <bits/stdc++.h>
#define FOR(i,a,b) for(int i = (a); i < (b); ++i)
#define REP(i,n) FOR(i,0,n)
#define SZ(n) (int)(n).size()
#define ALL(n) (n).begin(), (n).end()
#define MOD 1000003
#define INF 100000000
using namespace std;
typedef long long LL;
typedef vector<int> VI;
typedef pair<int, int> PI;

LL modp(LL a, LL b) {
	if (b == 0) return 1;
	if (b == 1) return a;
	if (b % 2 == 1) return (a * modp(a, b - 1)) % MOD;
	return (modp(a, b / 2) * modp(a, b / 2)) % MOD;
}

int main() {
	int x, n;
	cin >> x >> n;
	LL ans = 0;
	REP(i, n) {
		int a;
		cin >> a;
		ans += modp(x, a);
	}
	cout << ans % MOD << endl;
	return 0;
}