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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Random r = new Random(Guid.NewGuid().GetHashCode());
            var result = Enumerable.Range(0, 2500000).Select(x => r.Next()).Distinct().Take(2000000).ToArray();
            Console.WriteLine("结果的前1000个:");
            for (int i = 0; i < 200; i++)
            {
                Console.WriteLine(string.Join("\t", result.Skip(i * 5).Take(5).Select(x => x.ToString().PadLeft(10, ' '))));
            }
        }
    }
}