import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int x = scan.nextInt();
		int N = scan.nextInt();
		long []a = new long[N];
		for(int i = 0; i < N; i++) {
			a[i] = scan.nextInt();
		}
		scan.close();
		int k = 1000003;
		long ans = 0;
		for(int i = 0; i < N; i++) {
			long t = x % k;
			if(a[i] == 0) {
				ans ++;
				ans = ans % k;
			}else if(a[i] == 1) {
				ans += x % k;
			}else {
				for(int j = 2; j <= a[i]; j++) {
					t = (t * x) % k;
				}
				ans = ans + t % k;
				ans = ans % k;
			}

		}
		System.out.println(ans);
	}
}