import java.util.*;
import java.io.*;

public class Main {
    
    static int mod=1000003;
    
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(br.readLine());
        int x=Integer.parseInt(st.nextToken());
        int n=Integer.parseInt(st.nextToken());
        int[] a=new int[n];
        st=new StringTokenizer(br.readLine());
        for(int i=0;i<n;i++){ a[i]=Integer.parseInt(st.nextToken()); }
        long sum=0;
        for(int i=0;i<n;i++){
            //System.out.println(x+"^"+a[i]+"="+pow(x,a[i]));
            sum=(sum+pow(x,a[i]))%mod;
            //System.out.println(sum);
        }System.out.println(sum%mod);
    }
    
    static long pow(long x,int n){
        //System.out.println(x+" "+n);
        x%=mod;
        if(n==1){ return x; }
        if(n==0){ return 1; }
        if(n%2==0){
            return pow(x*x,n/2)%mod;
        }else{
            return (pow(x,n-1)*x)%mod;
        }
    }

}