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Grokking the Coding Interview Patterns

Solution: Delete N Nodes After M Nodes of a Linked List

Understand how to traverse and modify a linked list by retaining M nodes and deleting the next N nodes repeatedly until the end. Learn the algorithm to efficiently reconnect nodes while achieving O(n) time and O(1) space complexity.

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Statement

Given the head of a linked list and two integers, m and n, remove some specific nodes from the list and return the head of the modified, linked list. The list should be traversed, and nodes removed as follows:

  1. Start with the head node and set it as the current node.

  2. Traverse the next m nodes from the current node without deleting them.

  3. Traverse the next ...