class Program
    {
        static DateTime start = DateTime.Now;       
        static string ss = "192.168.";
        static void Main(string[] args)
        {    
       
            Console.Write("Enter number:");
            string num = Console.ReadLine();
            ss = ss + num + ".";
            Console.WriteLine(start);

            Pinger(new int[40], 0);
            Pinger(new int[80], 40);
            Pinger(new int[120], 80);
            Pinger(new int[160], 120);
            Pinger(new int[200], 160);
            Pinger(new int[240], 200);
            Pinger(new int[253], 240);

            Thread th = new Thread(Time);
            th.Start();
          
            Console.ReadLine();
        
        } 
        public static void Time()
        {        
            
            Thread.Sleep(20000);
            DateTime end = DateTime.Now;
            Console.Write(end - start);            
            
        }
 
        static async void Pinger(int[] Arr , int i)
        {
            using (Ping p = new Ping())
            {
               
                for (; i < Arr.Length; i++)
                {
                    PingReply pr = await p.SendPingAsync(ss + i, 100);
                    List<string> s1 = new List<string>();
                    s1.Add(ss + i);
                    
                    var sort = from u in s1 orderby i where pr.Status == IPStatus.Success select u ;
                    foreach(string u in sort)
                    Console.WriteLine(u);               
                        
                    
           
                }
            
            }

        }     
   
    }