Palindrome Linked List
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题目描述:
Given a singly linked list, determine if it is a palindrome.
Follow up:
Could you do it in O(n) time and O(1) space?
这个题要求空间复杂度为O(1),不能一开始就逆序,然后逐个比较,这样不符合要求。
链表无非就是逆序,插入,这个题和Reorder list差不多。
代码如下:
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