由于需要返回两个值,在 Java 中需要使用自定义类进行封装,C/C++ 中则可以使用指针改变在递归调用后进行比较时节点的值。 Java /*** Definition for singly-linked list. * public class ListNode { * int val; * ListNode next; * ListNode(int x) { val = x; } * }*/cl
publicbooleanisPalindrome(ListNode head){if(head ==null|| head.next ==null) {returntrue; }ListNoderesult=reverseList(head);while(head !=null&& result !=null) {if(head.val != result.val) {returnfalse; } head = head.next; result = result.next; }returntrue; }publicListNodereverseList(Li...
```java private ListNode reverseList(ListNode head) { if (head == null) { return null; } ListNode tail = null; while (head != null) { ListNode temp = head.next; head.next = tail; tail = head; head = temp; } return tail; } ``` 然后整体的代码就出来了。 public boolean isPali...
} if(end!=null)//in case of odd list mid=mid.next; mid=reverseList(mid); while(mid!=null){ if(mid.val!=head.val) returnfalse; mid=mid.next; head=head.next; } returntrue; } publicListNodereverseList(ListNodehead){ ListNodepre=null,next=null; while(head!=null){ next=head.next; ...
Palindrome Linked List 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) ......
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? 给定一个单链表,判断是否是回文链表 算法分析 首先产生该链表的逆序链表,然后比较两个链表的前半部分即可。 Java代码 参考 LeetCode os...
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? /** * Definition for singly-linked list. * public class ListNode { * int val;...
Java Linked List Interview Programs: Algorithm: Java Program: In this post, we will see how to check if linked list is palindrome or not. Java Linked List Interview Programs: How to reverse a linked list in java How to reverse a linked list in pairs in java How to find middle element ...
LeetCode 234:回文链表 Palindrome Linked List 请判断一个链表是否为回文链表。 Given a singly linked list, determine if it is a palindrome. 示例1: 代码语言: 运行次数:0 输入:1-false 代码语言:javascript 代码运行次数:0 运行 AI代码解释 输入:1->2->2->1输出:true...
Hide Tags Linked List Two Pointers 【解题思路】 1、遍历链表,快慢指针,找到链表后半部分。 2、反转链表,能够參考Reverse Linked List 3、然后比較前半部分和后半部分的val值。 Java AC /** * Definition for singly-linked list. * public class ListNode{* int val; ...