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Solution: Merge K Sorted Lists

Explore how to merge k sorted linked lists into a single sorted list by using a divide-and-conquer method that pairs and merges lists efficiently. Understand the use of two pointers and a dummy node to streamline merging, and analyze the O(n log k) time complexity. This lesson equips you with a practical approach to solve the k-way merge problem effectively.

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

  • ...