InterviewBit Problems   Vertical Order traversal of Binary Tree : Unsolved

About the Vertical Order traversal of Binary Tree : Unsolved category (1)
Please point out the mistake in this approach (1)
Solution to wrong answer and failing for larger test cases (2)
Read out for Clarification, what should happen if two nodes are at same vertical level (1)
Wrong expected output in submission (3)
vertical[index].push_back(A->val); This line is giving RTE (1)
Expected output seems wrong (1)
Got Partially correct because null condition wasn't checked! (1)
Can someone please help me, where is the error in my code? (3)
I m not getting any output (1)
LEet code soln not working! lt worked for 30 cases there (1)
Please help! Don't know what's the problem here (2)
Can anyone find the bug... code failing while submitting (2)
Simple BFS and done! (2)
What is the error in the code? i m not getting any output (1)
The question applies Level Order Traversal instead of Pre-order Traversal (1)
Interesting yet simple question (1)
Please change description as we have to do level order traversal not preorder traversal (7)
For People wondering why DFS/recursive soln. is not working (1)
Test Case is not valid (1)
What is bug in my code its giving wrong answer (1)
Ordering at some levels are reported incorrect, please help (1)
What is the problem with the following code? (1)
Not preorder traversal on nodes in same vertical column (1)
Ill-defined waste of time and server storage (4)
Getting ArrayIndexOutOfBoundsException (2)
No test case available with wrong answer output (2)
NullPointerException on line 309 (1)
Memory limit exceede (2)
Wrong expected output for case 1 2 3 -1 -1 4 -1 -1 5 -1 -1 (4)