import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		final int m = 1000003;
		int x = scanner.nextInt();
		int N = scanner.nextInt();

		int[] a = new int[N];
		for (int i = 0; i < N; i++) {
			a[i] = scanner.nextInt();
		}

		int sum = 0;
		for (int i = 0; i < N; i++) {
			int xa = 1;
			for (int j = 0; j < a[i]; j++) {
				xa *= x;
				while (xa > m) {
					xa -= m;
				}
			}
			sum += xa;
		}
		System.out.println(sum % m);
	}

}