Platform hackerrank. The worst experience I ever had.
3 Questions (Easy, Easy, Hard). Was forced to Use C language for one of the question.

1. Given a linkedlist, check if it is Palindrome or Not. (Forced to write in C language)
2. Minimum moves requried to Sort array. All evens on one side and All odds on one side.
3. (Hard) Subtract two numbers represented as Linked lists. ex: (1->0->0->0) - (1->0->0) = 9->0->0. Some of the test cases had very large numbers for example (4->435->54->4->6). the question description was not clear how to represent the final output.