There are 3 rounds of interviews:

• 1 phone interview
• 2 onsite interviews

Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists.

Assume we are dealing with an environment that can only store integers within the 32-bit signed integer range: [−2^31, 2^31 − 1]. For the purpose of this problem, assume that your function returns 0 when the reversed integer overflows.