using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Text;
using System.Text.RegularExpressions;
using System.Linq;

class Magatro
{
    const int MOD = 1000003;
    static void Main()
    {
        int x, N;
        string[] s = Console.ReadLine().Split(' ');
        x = int.Parse(s[0]);
        N = int.Parse(s[1]);
        int[] a = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
        long cnt = 0;
        for(int i = 0; i < N; i++)
        {
            cnt = (cnt + MyPow(x, a[i])) % MOD;
        }
        Console.WriteLine(cnt);

    }
static long MyPow(long a,long b)
    {
        long res = 1;
        while (b > 0)
        {
            if (b % 2 == 0)
            {
                a = (a * a) % MOD;
                b /= 2;
            }
            else
            {
                res = (res * a) % MOD;
                b--;
            }
        }
        return res;
    }
}