linked-list | two-pointers Companies amazon | facebook Given the head of a singly linked list, return true if it is a palindrome or false otherwise. 给你一个单链表的头节点head,请你判断该链表是否为回文链表。如果是,返回true;否则,返回fals
Leetcode之Palindrome Linked List 问题 问题描述: 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? 示例: 1->2->9->4->9->2->1 return true; 1->2-&... ...
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? 解题报告: 1. 找到LinkedList 的中点 2. 翻转链表(从中点的下一个节点到链表终点)得到另一个链表 3. 依次比较两个节点的值是否相等。 1/**2* Defi...
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1:创建一个ArrayList用于保存每个节点的value,遍历LinkedList将每个节点的value依次add到ArrayList中。 利用双指针,一个在ArrayList的首部,一个在ArrayList的尾部,相向遍历看其valu...
Palindrome Linked List Implement a function to check if a linked list is a palindrome. Example Given1->2->1, return true. 分析: 比较容易的方法是把所有的数存在ArrayList里,然后查看是否是palindrome,但是空间复杂度为O(n)。 还有就是先找到list的中点,然后把后半段reverse,然后再进行比较。但是这种...
原题链接: https://leetcode.com/problems/palindrome-linked-list/ 1. 题目介绍 Given a singly linked list, determine if it is a palindrome. 判断一个链表是不是回文串。 Example 1: Example 2: Follow up: Could you do it in O(n) ...[...
2264 Largest 3-Same-Digit Number in String Python 292nd Weekly Contest 56 Merge Intervals Interval Python 內含:python sorted key 搭配 lambda 的用法範例 57 Insert Interval Interval Python 61 Rotate List Linked List Python 2259 Remove Digit From Number to Maximize Result Python 291st Weekly Conte...
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? 思路: 把链表一分为二。把右边的一半翻转,再逐个比对左右的链表就可以。 /** * Definition for singly-linked list....
LeetCode - 234 - 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? 判断一个链表是不是回文,我的方法是把前一半链表翻转,然后再同时扫描,判断值是否相等。时间复杂度O(n),至于空间复杂度,我觉得...
234. Palindrome Linked List(Linked List-Easy) 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? 判断一个单链表是否是回文链表。 如:[ 1, 2, 3, 2, 1] 就是一个回文链表,正着依次看链表中元素和反着依次看链表中...