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[] r = new int[1000002];
    r[0] = 1;
    for(int i = 1; i < 1000002; i++) {
      r[i] = (r[i - 1] * x) % 1000003;
    }
    int ans = 0;
    for(int i = 0; i < n; i++) {
      int a = sc.nextInt();
      a = a % 1000002;
      ans = (ans + a) % 1000003;
    }
    System.out.println(ans);
  }
}