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Palindrome Linked List

Easy

Topics
Linked ListTwo PointersStack

Given the head of a singly linked list, return true if the sequence of values reads the same forwards and backwards. (The judge passes a plain acyclic list; pos is always -1.)

Example 1

Input:  head = [1,2,2,1]
Output: true

Example 2

Input:  head = [1,2]
Output: false

Constraints

  • 0 <= number of nodes <= 100
  • 0 <= Node.val <= 9
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