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Grokking the Coding Interview Patterns in Python

Solution: Reverse Nodes in Even Length Groups

Explore how to efficiently reverse nodes in even-length groups of a linked list in-place, without extra storage. Learn to manipulate pointers to achieve memory-optimized linked list transformations using a linear time approach.

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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...).

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