Palindrome Linked List
Understand how to verify if a linked list is a palindrome by applying the fast and slow pointer technique. This lesson guides you through preserving the original list while efficiently checking its palindrome property using algorithmic logic and coding practice.
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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;}