InterviewBit Problems   BST Iterator : Unsolved

About the BST Iterator : Unsolved category (1)
Very easy few lines of C++ code (1)
500 points for a question which wasn't worth even 5 minutes (1)
What is wrong in pushing pointers (2)
Can someone tell whether this is the correct way to solve this problem or not (space and time complexity wise)? (2)
Problem statement wrong (1)
Not able to understand why my code is showing TLE (4)
Fail test although my function return the correct answer (5)
USE queue and in order traversal (1)
Wrong TEST CASES for input! (1)
TLE sucks for this (1)
I did it in O(1) space no extra DS used (7)
NOT A BST How can code fail for this when this is a wrong input! (3)
O(h) space solutions not accepted (2)
What is the definition of class BSTIterator (1)
How can i define private data members for the class. Is there any way. Or do we h (2)
The thing about O(h) space, is it just a suggestion or is it a strict requirement (2)
Getting compilation error in header file solution.h ("solution.h:33:11: error: un (1)