01 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第58题(顺位题号是234)。给出一个单链表,确定它是否是回文。例如: 输入:1-> 2 输出:false 输入:1-> 2-> 2-> 1 输出:true 本次解题使用的开发工具是eclipse,jdk使用的版本是1.8,环境是win7 64位系统,使用Java语言编写和测试。 02 第一种解法 ...
https://leetcode.com/problems/palindrome-linked-list/ 思路1:遍历一次链表,用一个数组存储链表节点值,然后用双指针法判断数组是否是回文的。需要额外O(n)的空间。 C++ classSolution{public:boolisPalindrome(ListNode* head){if(!head || !head->next)returntrue; vector<int> vec;while(head) { vec.push...
然后我们从慢指针的下一个开始,把后面的链表都反转(Reverse Linked List),然后我们再从头和从尾同时向中间前进,就可以判断该链表是不是回文了。 代码 public class Solution { public boolean isPalindrome(ListNode head) { if(head == null || head.next == null) return true; ListNode fast = head; List...
Can you solve this real interview question? Palindrome Linked List - Given the head of a singly linked list, return true if it is a palindrome or false otherwise. Example 1: [https://assets.leetcode.com/uploads/2021/03/03/pal1linked-list.jpg] Inpu
Leetcode 234 Palindrome Linked List 复杂度为时间O(n) 和空间(1)解法,1.问题描写叙述给定一个单链表,推断其内容是不是回文类型。比如1–>2–>3–>2–>1。时间和空间复杂都尽量低。2.方法与思路1)比較朴素的算法。因为给定的数据结构是单链表,要訪问链表的尾部元素,
LeetCode: 234. Palindrome Linked List 题目描述 Given a singly linked list, determine if it is a palindrome. Example 1: Input: 1->2 Output: false 1. 2. Example 2: Input: 1->2->2->1 Output: true 1. 2. Follow up: Could you do it in O(n) time and ...
Can you solve this real interview question? Palindrome Linked List - Given the head of a singly linked list, return true if it is a palindrome or false otherwise. Example 1: [https://assets.leetcode.com/uploads/2021/03/03/pal1linked-list.jpg] Inpu
来源:力扣(LeetCode)链接:https://leetcode-cn.com/problems/palindrome-linked-list著作权归领扣网络所有。商业转载请联系官方授权,非商业转载请注明出处。 三、My answer # Definition for singly-linked list.# class ListNode:# def __init__(self, x):# self.val = x# self.next = Noneclass Solution...
Leetcode-Easy 234. Palindrome Linked List 描述: 判断一个单链表是否左右对称 代码语言: 代码运行次数: # Definitionforsingly-linked list.#classListNode:# def__init__(self,x):# self.val=x # self.next=NoneclassSolution(object):defisPalindrome(self,head):""":type head:ListNode:rtype:bool"""...
leetcode: Valid Palindrome | LeetCode OJ lintcode: (415) Valid Palindrome Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. Example "A man, a plan, a canal: Panama" is a palindrome. "race a car" is not...