LeetCode & linked list
数据结构 & 算法
链表
单链表
双链表
"use strict";
/**
*
* @author xgqfrms
* @license MIT
* @copyright xgqfrms
* @created 2020-11-17
* @modified
*
* @description 链表
* @difficulty Easy Medium Hard
* @complexity O(n)
* @augments
* @example
* @link
* @solutions
*
* @best_solutions
*
*/
const log = console.log;
// 节点
function ListNode(val, next) {
this.val = 0 || val;
this.next = null || next;
}
// 链表
function LinkedList(value) {
const node = new ListNode(value, ``);
if(!head) {
head = node;
} else {
let current = head;
while(current.next) {
current = current.next;
}
current.next = node;
}
};
// 链表
function ListNode(val, next) {
this.val = (val===undefined ? 0 : val)
this.next = (next===undefined ? null : next)
}
const singlyLinkedList = [...new Uint8Array(5)].map((item, i) => new ListNode(i + 1, i < 4 ? i + 2 : null));
reverse-linked-list
链表反转
https://leetcode.com/problems/reverse-linked-list/
"use strict";
/**
*
* @author xgqfrms
* @license MIT
* @copyright xgqfrms
* @created 2020-08-017
* @modified
*
* @description 206 reverse-linked-list
* @description 206 反转链表
* @difficulty Easy
* @complexity O(n)
* @augments
* @example
* @link
* @solutions
*
*/
const log = console.log;
/**
* Definition for singly-linked list.
* function ListNode(val, next) {
* this.val = (val===undefined ? 0 : val)
* this.next = (next===undefined ? null : next)
* }
*/
/**
* @param {ListNode} head
* @return {ListNode}
*/
var reverseList = function(head) {
let prev = null;
while (head) {
// swap
let temp = head.next;
head.next = prev;
prev = head;
head = temp;
}
return prev;
};
/*
[1,2,3,4,5]
执行步骤
p = null
h = 1
t = 2(h.n)
h.n = null(p)
// 1.n => null
p = 1(h)
h = 2t)
h = 2
t = 3(h.n)
h.n = 1(p)
// 2.n => 1
p = 2(h)
h = 3(t)
*/
/*
var reverseList = function(head) {
let prev = null;
let curr = head;
while (curr) {
let temp = curr.next;
curr.next = prev;
prev = curr;
curr = temp;
}
return prev;
};
*/
refs
https://leetcode.com/tag/linked-list/
https://leetcode.com/problemset/all/?topicSlugs=linked-list
https://leetcode.com/problemset/top-100-liked-questions/
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