[LeetCode]

题目地址:https://leetcode.com/problems/delete-node-in-a-linked-list/

Total Accepted: 78258 Total Submissions: 179086 Difficulty: Easy

题目描述

Write a function to delete a node (except the tail) in a singly linked list, given only access to that node.

Given linked list – head = [4,5,1,9], which looks like following:

4 -> 5 -> 1 -> 9

Example 1:

Input: head = [4,5,1,9], node = 5
Output: [4,1,9]
Explanation: You are given the second node with value 5, the linked list
should become 4 -> 1 -> 9 after calling your function.

Example 2:

Input: head = [4,5,1,9], node = 1
Output: [4,5,9]
Explanation: You are given the third node with value 1, the linked list
should become 4 -> 5 -> 9 after calling your function.

Note:

  1. The linked list will have at least two elements.
  2. All of the nodes’ values will be unique.
  3. The given node will not be the tail and it will always be a valid node of the linked list.
  4. Do not return anything from your function.

题目大意

给出了一个节点,这个节点是在一个单链表中的,并且这个节点不是最后一个节点。现在要我们删除这个节点。

解题方法

设置当前节点的值为下一个

拿到这个题时以为要从头找到这个节点前一个节点,然后删除当前节点。这个应该是正常思路。

但是,题目只给出了删除的这个节点,没有给出根节点。所以可以通过这个将当前的节点的数值改成下面的节点的值,然后删除下一个节点的方式。

链表基本操作,记待删除节点为node:

令node.val = node.next.val,node.next = node.next.next即可

Java代码如下:

	/**
* Definition for singly-linked list.
* public class ListNode {
* int val;
* ListNode next;
* ListNode(int x) { val = x; }
* }
*/
public class Solution {
public void deleteNode(ListNode node) {
node.val=node.next.val;
node.next=node.next.next;
}
}

python代码如下:

# Definition for singly-linked list.
# class ListNode(object):
# def __init__(self, x):
# self.val = x
# self.next = None class Solution(object):
def deleteNode(self, node):
"""
:type node: ListNode
:rtype: void Do not return anything, modify node in-place instead.
"""
node.val = node.next.val
node.next = node.next.next

C++代码如下:

/**
* Definition for singly-linked list.
* struct ListNode {
* int val;
* ListNode *next;
* ListNode(int x) : val(x), next(NULL) {}
* };
*/
class Solution {
public:
void deleteNode(ListNode* node) {
node->val = node->next->val;
node->next = node->next->next;
}
};

日期

2016/4/30 0:39:40
2018 年 11 月 11 日 —— 剁手节快乐
2019 年 9 月 27 日 —— 昨天面快手,竟然是纯刷题

【LeetCode】237. Delete Node in a Linked List 解题报告 (Java&Python&C++)的更多相关文章

  1. LeetCode 237 Delete Node in a Linked List 解题报告

    题目要求 Write a function to delete a node (except the tail) in a singly linked list, given only access ...

  2. [LeetCode] 237. Delete Node in a Linked List 解题思路

    Write a function to delete a node (except the tail) in a singly linked list, given only access to th ...

  3. LeetCode 237. Delete Node in a Linked List (在链表中删除一个点)

    Write a function to delete a node (except the tail) in a singly linked list, given only access to th ...

  4. [LeetCode] 237. Delete Node in a Linked List 删除链表的节点

    Write a function to delete a node (except the tail) in a singly linked list, given only access to th ...

  5. (easy)LeetCode 237.Delete Node in a Linked List

    Write a function to delete a node (except the tail) in a singly linked list, given only access to th ...

  6. leetcode 237 Delete Node in a Linked List python

    题目: Write a function to delete a node (except the tail) in a singly linked list, given only access t ...

  7. 17.leetcode 237. Delete Node in a Linked List

    Write a function to delete a node (except the tail) in a singly linked list, given only access to th ...

  8. [Leetcode]237. Delete Node in a Linked List -David_Lin

    Write a function to delete a node (except the tail) in a singly linked list, given only access to th ...

  9. LeetCode 237. Delete Node in a Linked List 删除链表结点(只给定要删除的结点) C++/Java

    Write a function to delete a node (except the tail) in a singly linked list, given only access to th ...

随机推荐

  1. 除了GO基因本体论,还有PO、TO、CO等各种Ontology?

    目录 PO/TO CO 后记 我们最常用最熟悉的功能数据库之一:GO(gene onotology),基因本体论.其实是一套标准词汇术语,目的是从不同角度来描述某个基因的特点和功能,三大本体如生物学进 ...

  2. Linux 软件安装位置选择指南

    Linux 软件安装   Linux 下安装软件不像 Windows 下安装这么简单,Windows 下会自动选择合适安装路径,而 Linux 下安装路径大部分完全由自己决定,我可以将软件安装到任意可 ...

  3. idea数据库报错java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

    通过idea操作数据库,进行数据的增加,运行时报错java.lang.ClassNotFoundException: com.mysql.jdbc.Driver 原因:没有导入mysql-connec ...

  4. 如何使用 Kind 快速创建 K8s 集群?

    作者|段超 来源|尔达 Erda 公众号 ​ 导读:Erda 作为一站式云原生 PaaS 平台,现已面向广大开发者完成 70w+ 核心代码全部开源!在 Erda 开源的同时,我们计划编写<基于 ...

  5. adverb

    An adverb is a word or an expression that modifies a verb, adjective, another adverb, determiner [限定 ...

  6. k8s使用ceph的rbd作后端存储

    k8s使用rbd作后端存储 k8s里的存储方式主要有三种.分别是volume.persistent volumes和dynamic volume provisioning. volume: 就是直接挂 ...

  7. nodejs-Child Process模块

    JavaScript 标准参考教程(alpha) 草稿二:Node.js Child Process模块 GitHub TOP Child Process模块 来自<JavaScript 标准参 ...

  8. Vue 之keep-alive的使用,实现页面缓存

    什么是keep-alive 有时候我们不希望组件被重新渲染影响使用体验: 或者处于性能考虑,避免多次重复渲染降低性能.而是希望组件可以缓存下来,维持当前的状态.这时候就需要用到keep-alive组件 ...

  9. 【Linux】【Service】【OpenSSL】原理及实现

    1. 概念 1.1. SSL(Secure Sockets Layer安全层套接字)/TLS(Transport Layer Security传输层套接字). 最常见的应用是在网站安全方面,用于htt ...

  10. 第7章 使用性能利器——Redis

    在现今互联网应用中,NoSQL已经广为应用,在互联网中起到加速系统的作用.有两种NoSQL使用最为广泛,那就是Redis和MongoDB.本章将介绍Redis和Spring Boot的结合.Redis ...