InterviewBit Problems   ZigZag Level Order Traversal BT : Unsolved

About the ZigZag Level Order Traversal BT : Unsolved category (1)
Simple understable java level order solution (1)
Runtime Error (on Submission) using c++ deque (1)
Use of global variables (1)
Simple unordered_map Solution (2)
Hint for solution using Deque (1)
Java Solution Without using queue (1)
Using Level Order (1)
Help me ! I'm getting Wrong Answer on test 2 (1)
Lies about memory exceeded error (10)
Can anybody help me why my code is not woking (1)
Can't call queue.front() on a delimiter NULL node (2)
Trying to solve using 2 stacks (2)
Output handling not correct (2)
Issue with my code? Giving memory exception (1)
JavaScript times out using best algorithm (2)
Input and Output is not clear for this problem (2)
Solution return type and Question return type are diff (1)
Output handling is not correct in Java (1)
Output displayed in limited space(for TEST WITH CUSTOM INPUT) (1)
Issue during compilation (1)
The Java is very inelegent. You could work with a far more elegant solution using (2)
Hello, I am coding in C and am getting a problem that I need to fill up len2 for (2)