static void Main(string[] args)
 {
     int n;
     int amount = 0;
     Console.Write("Enter an integer number: ");
     n = int.Parse(Console.ReadLine());
     UniqueNumbers cdn = new UniqueNumbers();
     amount = cdn.FindUniqueNumbers(n);
     Console.WriteLine("Amount of different numbers is " +  amount);
     Console.ReadKey();
 }