using System;
using System.Collections.Generic;
using System.Linq;

namespace yukicoder
{
    public class Program
    {
        public static void Main()
        {
            var line = Console.ReadLine().Split(' ');
            var x = long.Parse(line[0]);
            var n = int.Parse(line[1]);
            line = Console.ReadLine().Split(' ');
            var a = new long[n];
            long sum = 0;
            for(var i= 0; i < n; i++)
            {
                a[i] = int.Parse(line[i]);
            }
            var q = 1000003;
            var k = new List<long> { 1, x };
            while (k[1] % q > 1)
            {
                k[1] *= x;
                k[1] %= q;
                k[0]++;
            }
            for (var i = 0; i < n; i++)
            {
                a[i] %= k[0];
                long m = 1;
                for(var j = 0; j < a[i]; j++)
                {
                    m *= x;
                    m %= q;
                }
                sum += m;
                sum %= q;
            }
            Console.WriteLine(sum);
        }
    }
}