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

class Main{

static final PrintWriter out=new PrintWriter(System.out);
static final int mod=1000003;

public static void main(String[] args) throws IOException{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
String line="";
while((line=br.readLine())!=null&&!line.isEmpty()){
StringTokenizer st1=new StringTokenizer(line);
int n=Integer.parseInt(st1.nextToken());
int m=Integer.parseInt(st1.nextToken());
int[] a=new int[m];
line=br.readLine();
StringTokenizer st2=new StringTokenizer(line);
for(int i=0;i<m;i++) a[i]=Integer.parseInt(st2.nextToken());
long ans=0;
for(int i=0;i<m;i++){
ans+=pow_mod_1000003(n,a[i]);
}
out.println(ans%mod);
out.flush();
}
}
private static long pow_mod_1000003(int n,int a){
if(a==0) return 1;
long sum=1;
char[] bit=Integer.toBinaryString(a).toCharArray();
for(int i=0;i<bit.length;i++){
sum=sum*sum%mod;
if(bit[i]=='1') sum=sum*n%mod;
}
return sum;
}
}