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Grokking the Coding Interview Patterns in C++

Solution: Merge K Sorted Lists

Explore the divide and conquer approach to merge k sorted singly linked lists into one sorted linked list. Understand how pairing lists and merging stepwise reduces complexity and enables efficient sorting. This lesson guides you through the algorithm implementation, complexity analysis, and key techniques like using dummy nodes and pointers to manage merges effectively.

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Statement

You are given an array, lists, containing k singly linked lists. Each of these linked lists is individually sorted in ascending order.

Your task is to merge all k linked lists into a single sorted linked list in ascending order and return the merged list.

Constraints:

  • k ==== lists.length

  • ...