#include <iostream>
#include <string>
#include <vector>
#include <map>

using namespace std;

#define INF 		2000000007
#define MOD			1000003

#define MAX 		105

#define REP(i,n)	for(int i=0;i<(n);++i)
#define REPS(i,s,t)	for(int i=(s);i<(t);++i)

typedef unsigned int 			uint;
typedef unsigned long long int	ull;

long pow(long x, int n) { //x^n 計算量O(logn)
	long ans = 1;
	while (n > 0) {
		if ((n & 1) == 1) {
			ans = (ans * x)%MOD;
		}
		x = (x * x)%MOD; //一周する度にx, x^2, x^4, x^8となる
		n >>= 1; //桁をずらす n = n >> 1
	}
	return ans;
}

int main(){
	int x,N;
	scanf("%d %d",&x,&N);

	vector<int> a(N);
	REP(i,N) cin >> a[i];

	uint ans = 0;

	for(int t : a){
		ans = (ans + pow(x,t))%MOD;
	}
	cout << ans << endl;

	return 0;
}