using System.Linq;
using System;

public class Hello
{
    public const int MOD = 1000003;
    public static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var x = int.Parse(line[0]);
        var n = int.Parse(line[1]);
         line = Console.ReadLine().Trim().Split(' ');
        var a = Array.ConvertAll(line, int.Parse);
        var amax = a.Max();
        var k = (int)(Math.Log10(amax) / Math.Log10(2)) + 1;
        var p = new long[k];
        p[0] = x;
        for (int i = 1; i < k; i++)
            p[i] = (p[i - 1] * p[i - 1]) % MOD;
        var ans = 0L;
        for (int i = 0; i < n; i++)
        {
            ans += getPower(x, a[i], p, k);
            ans %= MOD;
        }
        Console.WriteLine(ans);
    }
    public static long getPower(int a, int b , long[] p  , int k)
    {
        if (b == 0) return 1L;
        if (b == 1) return a % MOD;
        var ret = 1L;
        for (int i = 0; i < k; i++)
            if (((b >> i) & 1) == 1)
            {
                ret *= p[i];
                ret %= MOD;
            }
        return ret;
    }
}