Linked List pattern

Palindrome Linked List

Given the head of a singly linked list, return whether the sequence of node values reads the same forward and backward. Watch it run step by step, then write your own pseudocode and get it checked by AI.

  • LeetCode 234
  • Easy
  • 2 approaches
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Linked ListLeetCode 234

Easy

From the first idea to the best one

  1. 01 Brute force · copy to array O(n)O(n) space
  2. 02 Optimized · reverse the back half O(n)O(1) space
Each approach plays step by step, with its time and space.

What you will learn

  • How to read Palindrome Linked List and spot the linked list pattern in it
  • Brute force · copy to array: O(n) time, O(n) space
  • Optimized · reverse the back half: O(n) time, O(1) space
  • The pseudocode for each approach, its line lit as the animation runs
  • Practice: write your own pseudocode and get it checked

More Linked List

See Palindrome Linked List run, step by step

Sign in and this page opens on the animation, with all 9 Linked List problems beside it.

Sign in to open itSee plans

DSA comes with the all labs plan and every ChaiCode batch.