import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        long x = sc.nextLong();
        int N = sc.nextInt();
        long mod = 1000003;
        long sum=0;
        for(int i=0; i<N; i++){
            long a = sc.nextInt();
            sum+=pow(x,a,mod);
        }
        System.out.println(sum);
    }
    static long pow(long x, long n, long m){
        if(n==0){
            return 1;
        }else if(n%2==1){
            long r = x*pow(x*x,n/2,m)%m;
            return r;
        }else{
            long r = pow(x*x,n/2,m)%m;
            return r;
        }
    }
}