InterviewBit Problems   Least Common Ancestor : Unsolved

About the Least Common Ancestor : Unsolved category (1)
Refer to this video. Nice Explanation (1)
Error in evaluating Efficiency (6)
My code is working fine while running this test case as custom input how ever it is failing for this test case while submitting (3)
Please check this (1)
Least Common Ancestor of a Tree (7)
Problem in Test (3)
Awarded 0 even when my submission was exactly correct! (2)
One of the test case is failing (6)
Runtime Error Problem (1)
Issue with the returned value (1)
LOL! They awarded me 875/450 points on this question XD (1)
LCA of binay tree (3)
AVOID using GLOBAL VARAIBLES even if you are CLEARING them up (2)
Why is this not working? (1)
Why is it giving lca not defined (1)
Memory Limit Exceed Problem (4)
Getting wrong answer on finding path to both the nodes (2)
Can you explain the expected output for the following input (2)
Problem with the test cases (2)
May be a wrong output? (1)
Different answer when I run Test Case as custom input and on submission (2)
Wrong expected answer for this input (3)
Trees given are not binary tree (3)
Hi, The problem mentions that "No guarantee that val1 and val2 exist in the tree (11)
Please clarify that the there can be not more than one of each val1 and val2 (1)
Bug in least common ancestor code (1)
Do not use Binary Lifting solution (1)
Integer == Integer is not the same as int == int (2)
How to modify node struct? (2)