#include<stdio.h>
#include <vector>
#include <list>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <algorithm>
#include <sstream>
#include <iostream>
#include <string>
#include <stdio.h>

using namespace std;

int main() {

	long long MOD = 1000003, x, N, a[105], ans = 0;
	cin >> x >> N;
	for (int i = 0; i < N; i++) {
		cin >> a[i];
	}

	for (int i = 0; i < N; i++) {
		long long cnt = 1;
		for (long long j = 0; j < a[i]; j++) {
			cnt = cnt * x % MOD;
		}
		//cout << "cnr: " << cnt << endl;
		ans = (ans + cnt) % MOD;
	}

	cout << ans << endl;

	return 0;
}