Reverse a singly linked list. Example: Input:1->2->3->4->5->NULL Output:5->4->3->2->1->NULL Follow up: A linked list can be reversed either iteratively or recursively. Could you implement both? 问题 力扣 反转一个单链表。 示例: 输入:1->2->3->4->5->NULL 输出:5->4->3-...
A linked list can be reversed either iteratively or recursively. Could you implement both? 反向链表,分别用递归和迭代方式实现。 递归Iteration: 新建一个node(value=任意值, next = None), 用一个变量 next 记录head.next,head.next指向新node.next,新 node.next 指向head,next 进入下一个循环,重复操作,...
第一种方法:迭代 代码语言:javascript 代码运行次数:0 classListNode(object):def__init__(self,x):self.val=x self.next=NoneclassSolution(object):defreverseList(self,head):""":type head:ListNode:rtype:ListNode""" pre=cur=Noneifhead:pre=head cur=head.next pre.next=Noneelse:returnNonewhilecur:...
题目: Reverse a singly linked list. Hint: A linked list can be reversed either iteratively or recursively. Could you implement both? 思路: 头插法建立链表 算法: 1. public ListNode reverseList(ListNode head) { 2. ListNode p = head, q, t; 3. if (p == null) 4. return head; 5. q ...
Python """ Definition of ListNode class ListNode(object): def __init__(self, val, next=None): self.val = val self.next = next """classSolution:""" @param head: The first node of the linked list. @return: You should return the head of the reversed linked list. ...
文章作者:Tyan 博客:noahsnail.com | CSDN | 简书 1. Description 2. Solution Iteratively Recursively Reference https://leetcode.com/problems/reverse-linked-list/description/... LeetCode-206-Reverse Linked List 题目Reverse a singly linked list. Example: Input: 1->2->3->4->5->NULL Output: 5...
Reverse a singly linked list. click to show more hints. Hint: A linked list can be reversed either iteratively or recursively. Could you implement both? 递归法 复杂度 时间O(N) 空间 O(N) 递归栈空间 思路 基本递归 代码 public class Solution { ...
2018-09-11 22:58:29 一、Reverse Linked List 问题描述: 问题求解: 解法一:Iteratively,不断执行插入操作。 解法二:Recursively,不断向newHead前面加入新的节点 二、Reverse Linked List II 问题描述: 问题求解 i++ 问题求解 迭代 反转链表 原理 转载 mob604756f6df2a 2018-09-11 23:03:00 117阅读 2...
LeetCode 0206. Reverse Linked List反转链表【Easy】【Python】【链表】 Problem LeetCode Reverse a singly linked list. Example: Input:1->2->3->4->5->NULL Output:5->4->3->2->1->NULL Follow up: A linked list can be reversed either iteratively or recursively. Could you implement both?
A linked list can be reversed either iteratively or recursively. Could you implement both? 题目大意 翻转单链表。 解题方法 迭代 迭代解法,每次找出老链表的下一个结点,插入到新链表的头结点,这样就是一个倒着的链。 举例说明: old->3->4->5->NULL ...