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_back(head->val); head = head->next; }for(inti ...
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? 思路: 一开始我想到的方法伪码如下: while head不空: {做如下的事情: 保存表头,然后找到list中的最后一个元素,如果他们不等,那么输出False。如果他们相等,head前进一步,倒数第...
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
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 O(1) space? 解题思路 —— 递归求...
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-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"""...
My code: importjava.util.Stack;/** * Definition for singly-linked list. * public class ListNode { * int val; * ListNode next; * ListNode(int x) { val = x; } * } */publicclassSolution{publicbooleanisPalindrome(ListNode head){if(head==null||head.next==null)returntrue;ListNode slow=...
234. Palindrome Linked List 原题链接:https://leetcode.com/problems/palindrome-linked-list/ 我自己的想法是把这个链表复制一份然后倒过来,对比一下两个链表是否一样。想法简单但是操作起来非常复杂···链表的复制和比较都用自定义func来实现的。 顺便总结一下copy.copy和copy.deepcopy的区别...
LeetCode problem solving notes. Determine whether a linked list is a palindrome linked list. First convert the linked list into an array, and then judge whether the array is a palindrome array.
[Leetcode] Palindrome Linked List 回文链表 Palindrome Linked List 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? 反转链表 复杂度 时间O(N) 空间 O(1) 思路