#include <cstdio>
using namespace std;

#define MOD 1000003
#define N_MAX 100
int x, N;
int a[N_MAX];

int main() {
	scanf("%d%d", &x, &N);
	for (int i = 0; i < N; i++) scanf("%d", a + i);
	
	long long res = 0;
	for (int i = 0; i < N; i++) {
		long long yy = 1;
		while (2 < a[i]) {
			long long y, z;
			y = a[i] ? x : 1;
			z = 1;
			while (z * 2 < a[i]) {
				y *= y;
				y %= MOD;
				z *= 2;
			}
			a[i] -= z;
			yy *= y;
			yy %= MOD;
		}
		while (a[i]) {
			yy *= x;
			yy %= MOD;
			a[i]--;
		}
		res += yy;
		res %= MOD;
	}
	
	printf("%lld\n", res);
	
	return 0;
}