import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		long sum = 0;		
		int x = scan.nextInt();
		int N = scan.nextInt();
		int m = 1000003;
		
		for(int i=0; i<N; i++) {
			int a = scan.nextInt();
			sum += pow(x,a,m);
		}
		scan.close();
		
		System.out.println(sum % m);
	}
	
	static long pow(int x, int a, int m) {
		if(a==0) return 1;
		long ret = 1L;
		
		long v = x % m;
		String b = Integer.toBinaryString(a);
		if(b.charAt(b.length()-1) == '1') ret = v;
		
		for(int i=b.length()-2; i>=0; i--) {
			v = (v * v) % m;
			if(b.charAt(i) == '1') {
				ret = (ret * v) % m;
			}
		}
		return ret;
	}
}