Linked List Merge (K-Way)

The Linked List Merge (K-Way) technique is applied when tackling problems characterized by specific invariants in the problem state or constraints:

• Core Strategy: Merge two or more already-sorted linked lists into one sorted list by repeatedly picking the smallest head.
• When to use: Look for opportunities where repeated re-computation can be replaced by maintaining monotonic properties, state windows, or relational pointers.
• Interview Signal: Demonstrating this pattern shows mastery of Linked List foundations, reducing worst-case algorithmic complexity.