标签：none 回文 image nod color div com src bsp
题目描述;
方法一：O(N) O(1)
# Definition for singly-linked list. # class ListNode: # def __init__(self, x): # self.val = x # self.next = None class Solution: def isPalindrome(self, head: ListNode) -> bool: if not head or not head.next:return True slow = head fast = head while fast and fast.next: fast = fast.next.next slow = slow.next if fast: slow = slow.next prew = None cur = slow while cur: tmp = cur.next cur.next = prew prew = cur cur = tmp p1 = head p2 = prew while p1 and p2: if p1.val!=p2.val:return False p1 = p1.next p2 = p2.next return True
标签：none 回文 image nod color div com src bsp
原文地址：https://www.cnblogs.com/oldby/p/11625440.html
