234. Palindrome Linked List
Given the head of a singly linked list, return true if it is a palindrome or false otherwise.
Example 1:
Input: head = [1,2,2,1] Output: true
Example 2:
Input: head = [1,2] Output: false
Constraints:
- The number of nodes in the list is in the range
[1, 105]. 0 <= Node.val <= 9
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1# Definition for singly-linked list.
2# class ListNode:
3# def __init__(self, val=0, next=None):
4# self.val = val
5# self.next = next
6class Solution:
7 def isPalindrome(self, head: Optional[ListNode]) -> bool:
8
Starter codePython 3Spaces: 4
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1# Definition for singly-linked list.
2# class ListNode:
3# def __init__(self, val=0, next=None):
4# self.val = val
5# self.next = next
6class Solution:
7 def isPalindrome(self, head: Optional[ListNode]) -> bool:
8
Starter codePython 3Spaces: 4
Examples
Input
[1,2,2,1]
Input
[1,2]
Your code is saved on this device.Solution