private static void Main(string[] args)
{
Console.WriteLine("Enter a collection of numbers in the range [0,100], seprated by spaces: ");
var userInput = Console.ReadLine();
var tempArray = userInput.Split(' ');
string[] inputArray = new HashSet <string>(tempArray).ToArray(); // removing duplicates
BST firstTree = new BST();
for (int i = 0; i < inputArray.Length; i++)
{
firstTree.Insert(int.Parse(inputArray[i]));
}
firstTree.TreeStatistcis();
}