#include <stdio.h>

int main(void) {
	long long int x, n;
	long long int a[101];
	long long int i, j;
	long long int total = 0;
	long long int subtotal;
	
	scanf("%lld%lld", &x, &n);
	for(i = 1;i <= n;i++){
		scanf("%lld", &a[i]);
	}
	for(i = 1;i <= n;i++){
		subtotal= 1;
		for(j = 0;j < a[i];j++){
			subtotal = ((subtotal % 1000003) * (x % 10000003)) % 1000003;
		}
		//printf("subtotal = %lld\n", subtotal);
		total = (total + subtotal) % 1000003;
	}
	//printf("total = %lld\n", total % 1000003);
	printf("%lld\n", total);
	
	return 0;
}