public static BinarySearchTree <T> GetBstFromSortedList(SinglyLinkedList <T> sortedList)
{
int n = sortedList.GetCount();
SllNode <T> head = sortedList.Head;
BinaryTreeNode <T> root = BinarySearchTree <T> .GetBstFromSortedListInternalUtil(ref head, n);
return(new BinarySearchTree <T>(root));
}