InterviewBit Problems   Kth Smallest Element In Tree : Unsolved

About the Kth Smallest Element In Tree : Unsolved category (1)
What is -1 in the example set? (2)
Heap based approach (3)
Inorder traversal of BST will give us a sorted array (1)
297/300 but no superman (10)
Help: Same solution accepted in leetcode for same problem (3)
We can solve this problem using heap (1)
Given solution is not working (2)
Solution using vector (not recommended) (1)
Solution Using Pbds (1)
Mera beta neche comment karega! (2)
Iterative inorder to get Kth smallest element (1)
Easy C++ soln (working) (1)
Inordering the tree (2)
Easiest solution using heap (4)
Python- Solution Tab not working (1)
Giving right output as custom but incorrect when submitting (6)
Whats the bug in this Java solution (4)
Different answers on custom input and submit, even after not using a global variable (2)
Is ONLY COMPLETE binary trees allowed? (1)
Same input gives different result from custom input and test option (2)
Duplicates in BST! (3)
Can anyone explain how the input has to be interpreted (4)
Can anybody tell me why its giving RUNTIME ERROR (1)
Not understanding the problem (2)
Do not use count as variable name in your program (2)
Problem in logic (1)
Problem with test case correction (1)
Time Complexity Too Much (1)
Test case problem (2)