#include <iostream>
#include <algorithm>
#include <functional>
#include <string>
#include <limits.h>
#include <vector>
#include <numeric>
using namespace std;

int main(){
	long x;
	int n;
	long sisuu[100];
	long ans = 0;
	long cnt = 0;
	long now = 1;
	
	cin >> x >> n;
	for(int i=0; i<n; i++){
		cin >> sisuu[i];
	}
	
	sort(sisuu, sisuu + n);
	
	for(int i=0; i<n; i++){
		while(sisuu[i] != cnt){
			cnt ++;
			now = (now * x) % 1000003;
		}
		
		ans = (ans + now) % 1000003;
	}
	
	cout << ans << endl;
	
	return 0;
}