LeetCode 234 Palindrome Linked List(回文链表)(*)(?)
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翻译
给定一个单链表,确定它是否是回文的。跟进:你可以在O(n)时间和O(1)空间下完成它吗?
原文
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?
进阶
bool judge(ListNode *head, ListNode* &cur) { if (!head) return true; if (!judge(head->next, cur)) return false; if (cur->val != head->val) return false; else { cur = cur->next; return true; }}bool isPalindrome(ListNode* head) { ListNode *cur = head; return judge(head, cur);}
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