InterviewBit Problems   Diffk II : Unsolved

About the Diffk II : Unsolved category (1)
Three line easy cpp code (1)
Very very easy solution 4 line O(n); (1)
Cheat the compiler (3)
Test case error? (1)
A small hint for c++ users (7)
Title of your comment Simple but different from given solution (1)
Easiest and Shortest C++ Soln (1)
Non-Linear solution getting accepted (3)
Unordered_map VS orederd (2)
Getting runtime error (2)
Non-Linear getting accepted (1)
Wrong input shown (1)
Getting wrong answer for one input (2)
Efficiency Issue with problem (1)
O(n^2) solution is also getting accepted.It should be only O(n) (1)
Is O(N) space complexity & O(N) time complexity acceptable? (N = A.size()) (3)
Doubt in Test Case (2)
Not able to solve test cases (2)
Error in test for Swift (1)
Memory not taken care of (1)
I think the expected time comlexity and space complexity should me mentioned in t (2)