InterviewBit Problems   Add Two Numbers as Lists : Unsolved

About the Add Two Numbers as Lists : Unsolved category (1)
O(n) time and O(1) space complexity easy solution (1)
! Why (carry and head2 loop) is not working? (1)
Wrong answer for large inputs helpp (1)
Why is this not working...............................k (1)
Everything is fine in this code (1)
Memory limit Exceed..I know it's not a good approach.please help me to modify it (2)
Readable & Concise Code (2)
Runtime Error. java.lang.OutOfMemoryError: Java heap space (1)
Wrong Explanation for Trailing Zeros (2)
Additional Difficulty: What if the number representation is NOT in the REVERSE sorted order. Then how to solve it? (2)
Can't find the reason for runtime error (2)
Why no output everything seems right (1)
Return value of the function (1)
Title of your comment my code give wrong ans for large inputs and cant find mistake in my code (1)
Need Explanation regarding "ListNode(int x) : val(x), next(NULL) {}" provided in struct (3)
Compiler giving wrong output other compilers are giving correct result (1)
Help me to find my mistake (1)
Terminated after throwing an instance of std:out of range what():stoi Aborted HELP (1)
My approach on paper (picture) for solving it in JavaScript (1)
Wrong answer please check the code (1)
Expected output is incorrect for the test case 002 + 0003 (4)
Strange behavior on runtime (3)
New operator is not working,showing error (3)
New operator not working (1)
Getting error for large int values despite of using "long int" (2)
New operator is not working (2)
"Time Limit Exceeded." for some test case. PLZZ HELP! (1)
Expected time complexity? (6)
Memory corruption in Swift testcases (2)