#include <iostream>
#include <sstream>
#include <math.h>
#include <stack>
#include <set>
#include <algorithm>
#include <string>
#include <queue>
#include <stack>
#include <map>
#include <cstdio>
#include <vector>
using namespace std;

#define INF (1 << 30)
#define INFLL (1LL << 60)

long long rui(int a,int n){
	if(n == 0) return 1;
	return rui(a,n-1) * a % 1000003;
}

int main() {
	long long x,n,a,ans = 0;
	cin >> x >> n;
	for(int i = 0;i < n;i++){
		cin >> a;
		long long num = x;
		if(a == 0) num = 1;
		for(int j = 0;j < a-1;j++){
			num = num * x % 1000003;
		}
		ans += num;
	}
	cout << ans % 1000003 << endl;
	return 0;
}