InterviewBit Problems   Kth Smallest Element In Tree : Unsolved

About the Kth Smallest Element In Tree : Unsolved category (1)
Easiest solution using heap (4)
297/300 but no superman (2)
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)
Inordering the tree (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)
Wrong Checker Program? (4)