import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int x = sc.nextInt();
        int N = sc.nextInt();
        int m = 1000003;
        int sum=0;
        for(int i=0; i<N; i++){
            int t=1;
            int a = sc.nextInt();
            while(a!=0){
                t=t*x%m;
                a--;
            }
            sum=sum+t;
        }
        System.out.println(sum);
    }
}