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Grokking the Coding Interview Patterns in C++

Solution: Maximum Twin Sum of a Linked List

Explore how to find the maximum twin sum in a linked list with an even number of nodes by using fast and slow pointers to locate the middle node, reversing the second half of the list, and comparing paired nodes. This lesson helps you implement and understand an O(n) time and O(1) space 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/ ...