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 int[n];
            long sum = 0;
            for(var i= 0; i < n; i++)
            {
                a[i] = int.Parse(line[i]);
            }
            for(var i = 0; i < n; i++)
            {
                long k = 1;
                for(var j = 0; j < a[i]; j++)
                {
                    k *= x;
                    k %= 1000003;
                }
                sum += k;
            }
            Console.WriteLine(sum);
        }
    }
}