Palindrome Linked List
Explore how to identify whether a linked list is a palindrome while preserving its original structure. This lesson teaches the use of fast and slow pointers to solve the problem efficiently, reinforcing your skills in linked list manipulation and algorithm design.
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Statement
Given the head of a linked list, your task is to check whether the linked list is a palindrome or not. Return TRUE if the linked list is a palindrome; otherwise, return FALSE.
Note: The original structure of the linked list must remain unchanged before and after the checking process.
Constraints:
Let n be the number of nodes in a linked list.
-
n -
Node.value.
Examples
Understand the problem
Let’s take a moment to make sure you’ve correctly understood the problem. The quiz below helps you check if you’re solving the correct problem:
Palindrome Linked List
What is the output if the following linked list is provided as input?
7 → 3 → 3 → 3 → 7
TRUE
FALSE
Figure it out!
We have a game for you to play. Rearrange the logical building blocks to develop a clearer understanding of how to solve this problem.
Try it yourself
Implement your solution in the following coding playground. We have also provided a useful code template that you may build on to solve this problem.
// Definition for a Linked List node// class ListNode {// public:// int val;// ListNode* next;// // Constructor// ListNode(int val = 0, ListNode* next = nullptr);// };#include "LinkedListReverse.cpp"bool Palindrome(ListNode* head){// Replace this placeholder return statement with your codereturn false;}