#include <algorithm>
#include <cmath>
#include <complex>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <map>
#include <queue>
#include <set>
#include <string>
#include <vector>
using namespace std;
typedef long long int ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
#define rep(i,x) for(int i=0;i<(int)(x);++i)

int main(){
	int x, n, ret = 0;
	cin >> x >> n;
	ll a, tmp;
	rep(i,n) {
		cin >> a;
		if (!a) ++ret;
		else {
			tmp = 1;
			for (ll j=0; j<a; ++j) tmp = (tmp*x)%1000003;
			ret += tmp;
		}
		ret %= 1000003;
	}
	cout << ret << endl;
	return 0;
}