Clone linked list with random pointers

Q: Clone linked list with random pointers

This question evaluates a candidate's ability to implement a deep copy of a pointer-based linked structure with next and random pointers, testing skills in pointer manipulation, memory management, and maintaining relational invariants.

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Question

Clone a linked structure where each node has next and random pointers. Return the head of a deep copy that preserves both next and random relationships. Provide an O(n) time solution and explain two approaches: using a hash map and using O(

extra space by interleaving nodes. Analyze edge cases such as cycles and null random pointers.

Clone linked list with random pointers

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