InterviewBit Problems   BST Iterator : Solved

About the BST Iterator : Solved category (2)
Simple C++ Soln (Very easy) (1)
Lame Python solution using heap (1)
Pythonic solution using a recursive generator (1)
Easy Cpp solution(MUST READ) (1)
I solved using heap. Is it a correct way? (2)
Simple C++ code Rosh (2)
Solution only using vectors (1)
C++: That was easy (1)
Very very simple c++ solution (1)
Simple c++ using set and inorder (1)
O(1) hasNext() but not O(1) next() (1)
C++ Neat solution with comments, Iterative Inorder using stack, Suggestions Welcome :) (1)
Simple and Efiicient C++ Solution (1)
C++ simple solution using stack (1)
Intuitive Solution python 3 (using inorder traversal) (1)
C++ solution using vector (3)
Java sol for bst ite (1)
Simplest & shortest sol. space o(h) (1)
Simple solution using Inorder traversal O(1) time and O(n) space complexity (1)
Simple but not optimized solution (2)
Simple solution, using a stack (2)
Not printing upon returning using hash map (1)
Simple C++ Solution using Queue (1)
Simple Solution With Optimized Space (1)
Neat python code (2)
Simple solution using hashmap (1)
Beautiful python solution with an inorder iterator (1)
What's the problem in this? I have converted BST to doubly linked list (1)
Issue with Fastest Solution C++ (1)