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Grokking the Coding Interview Patterns in JavaScript

Solution: Maximum Twin Sum of a Linked List

Explore how to find the maximum twin sum in a linked list by first locating the middle node using fast and slow pointers, then reversing the second half of the list. Understand how to calculate twin sums by pairing nodes from both halves, and learn an O(n) time and O(1) space complexity solution for this problem.

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Statement

In a linked list with an even number of nodes (nn), each node at position ii (using 00−-based indexing) is paired with the node at position (n−1−in - 1 - i). These pairs are called twins for all 0≤i<n/ ...