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

int MOD = 1000003;

long long Calc(long long A, long long B) {
	if (B == 0) return 1;
	if (B % 2 == 0) {
		long long C = Calc(A, B / 2);
		return (C * C) % MOD;
	}
	return (A * Calc(A, B - 1)) % MOD;
}

int main() {
	int X, N, ANS = 0;
	cin >> X >> N;
	for (int i = 0; i < N; i++) {
		int A;
		cin >> A;
		ANS += Calc(X, A);
		ANS %= MOD;
	}
	cout << ANS << endl;
}