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Grokking the Coding Interview Patterns in C#

Reverse Nodes in Even Length Groups

Understand how to manipulate linked lists by reversing nodes in groups that have an even number of nodes. Explore efficient in-place techniques to restructure linked lists while maintaining O(n) time and O(1) space. This lesson guides you in implementing group-wise reversals based on sequential natural number groupings.

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Statement

Given the head of a linked list, the nodes in it are assigned to each group in a sequential manner. The length of these groups follows the sequence of natural numbers. Natural numbers are positive whole numbers denoted by (1,2,3,4...)(1,2,3,4...).

In other words:

  • The 1st1^{st} ...