# Maximum Twin Sum of a Linked List

Category

Linked List

Checkbox

Checkbox

Difficulty

Medium

Index

32

Key Ideas

The key idea to solve this problem is to use a two-pointer approach to find the maximum sum of twin pairs in a linked list.

Problem Number

2130

Problem Summary

The problem "Maximum Twin Sum of a Linked List" (Problem Number: 2130) is a medium difficulty problem in the Linked List category. The goal is to find the maximum sum of two non-overlapping sublists in a given linked list. Key pitfalls to watch out for include properly handling empty lists, considering edge cases with only one or two nodes, and efficiently finding the maximum sum by keeping track of cumulative sums.

Solution Summary

The best solution for the Maximum Twin Sum of a Linked List problem involves using two pointers. We start with two pointers, one at the beginning and the other at the end of the linked list. We compare the values at these pointers and calculate their sum. If the sum is greater than the maximum twin sum encountered so far, we update the maximum twin sum. Then, we move the pointers towards the center of the linked list by one step and repeat the process. By iterating through the linked list in this manner, we can find the maximum twin sum efficiently. The time complexity of this solution is O(n), where n is the number of nodes in the linked list.

Tags

Linked List

Two Pointers

Stack