STAP細胞を探すC#コード

stap.cs

using System;
using System.Linq;

namespace STAP
{
    class Program
    {
        static void Main(string[] args)
        {
            var rnd = new Random();
            string alpha = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
            bool[] history = new bool[(int)Math.Pow(26, 4)];
            int cnt = 0;

            while (true)
            {
                System.Threading.Thread.Sleep(50);
                cnt++;
                int[] num = new int[4];
                string cell = "";
                for (int i = 0; i < 4; i++)
                {
                    num[i] = rnd.Next(26);
                    cell += alpha[num[i]];
                }
                int hash = getHash(num);
                if (history[hash] == true) continue;

                history[hash] = true;
                Console.WriteLine("{0} : {1:000000}", cell + "細胞", cnt);
                if (cell == "STAP") break;
            }

            Console.WriteLine("陽性確認！よかった");
            Console.ReadKey();
        }

        static int getHash(int[] table)
        {
            int hash = 0;
            var factor = Enumerable.Range(0, table.Length).Reverse().Select(p => (int)Math.Pow(26, p)).ToArray();
            for (int i = 0; i < table.Length; i++)
                hash += table[i] * factor[i];
            return hash;
        }

    }
}