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Solution: Reorder List

Understand how to reorder a singly linked list in-place by identifying the middle node using two pointers, reversing the second half of the list, and merging the halves by alternating nodes. This lesson guides you through an efficient algorithm with linear time complexity and constant space usage to manipulate linked list nodes without modifying their values.

Statement

Given the head of a singly linked list, reorder the list as if it were folded on itself. For example, if the list is represented as follows:

L0L_{0} ...