Merge two sorted linked lists

Q: Merge two sorted linked lists

This is a Coding & Algorithms interview question from HubSpot for Software Engineer roles. View the full question and solution on PracHub.

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Question

Given the heads of two singly linked lists sorted in non-decreasing order, merge them into a single sorted singly linked list and return its head. Implement both iterative and recursive solutions, analyze time and space complexity, and handle edge cases such as empty lists and duplicate values.

Merge two sorted linked lists

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