序列leetcode 1143
时间序列分析中ARMA模型
原文：https://zhuanlan.zhihu.com/p/352053880?utm_id=0 ARMA模型的全称是自回归移动平均（auto regression moving average）模型，它是目前最常用的拟合平稳序列的模型。 它又可以细分为AR模型（auto regression ......
Codility / LeetCode的重要性与注意事项
Codility / Leetcode 不只会针对回答内容给出最终分数，也会一并记录解题的过程供面试官参考; 相较于现场考试，Codility / Leetcode可以省下更多时间，也能让求职者在最熟悉的环境发挥实力。 进行测验前 先查看Codility / Leetcode FAQ，并完成demo ......
[LeetCode] 2268. Minimum Number of Keypresses
You have a keypad with 9 buttons, numbered from 1 to 9, each mapped to lowercase English letters. You can choose which characters each button is match ......
[LeetCode] 2323. Find Minimum Time to Finish All Jobs II
You are given two 0-indexed integer arrays jobs and workers of equal length, where jobs[i] is the amount of time needed to complete the ith job, and w ......
[LeetCode] 2330. Valid Palindrome IV
You are given a 0-indexed string s consisting of only lowercase English letters. In one operation, you can change any character of s to any other char ......
[LeetCode] 2340. Minimum Adjacent Swaps to Make a Valid Array
You are given a 0-indexed integer array nums. Swaps of adjacent elements are able to be performed on nums. A valid array meets the following condition ......
[LeetCode] 2422. Merge Operations to Turn Array Into a Palindrome
You are given an array nums consisting of positive integers. You can perform the following operation on the array any number of times: Choose any two ......
[LeetCode] 1676. Lowest Common Ancestor of a Binary Tree IV
Given the root of a binary tree and an array of TreeNode objects nodes, return the lowest common ancestor (LCA) of all the nodes in nodes. All the nod ......
LeetCode之0661, 二维向量初始化
img[i][j]周围的单元格，img[i+i1][j+j1], i1=-1,0,1, j1=-1,0,1, 每个都判断一次。O(9*m*n) class Solution { public: std::vector<std::vector<int>> imageSmoother( std::vec ......
Leetcode之0709, 修改字符串
1 class Solution { 2 public: 3 string toLowerCase(string s) { 4 for(char &ch: s){ 5 if(ch>='A' && ch<='Z'){ 6 ch=tolower(ch); 7 } 8 } 9 return s; 10 } ......
[LeetCode] 2486. Append Characters to String to Make Subsequence
You are given two strings s and t consisting of only lowercase English letters. Return the minimum number of characters that need to be appended to th ......
mq json转换器 JSON泛型反序列化, 多层嵌套，使用 TypeReference
需求 解析JSON, 并将其转换为对应的数据结构。例如：转换为 Map<String, Object> ......
[刷题记录Day4]Leetcode链表专题
# No.1 ## 题目 [两两交换链表中的节点](https://leetcode.cn/problems/swap-nodes-in-pairs/) ## 思路 - 模拟类型题目 - 两个节点前后交换，同时记住原来的下一个节点 - 虚拟头节点 ## 代码 ```Java public ListN ......
LeetCode 1201. Ugly Number III 数学+二分答案
An ugly number is a positive integer that is divisible by $a$, $b$, or $c$. Given four integers $n$, $a$, $b$, and $c$, return the $n$th ugly number. ......
128. 最长连续序列
给定一个未排序的整数数组 nums ，找出数字连续的最长序列（不要求序列元素在原数组中连续）的长度。 请你设计并实现时间复杂度为 O(n) 的算法解决此问题。 ``` 示例 1： 输入：nums = [100,4,200,1,3,2] 输出：4 解释：最长数字连续序列是 [1, 2, 3, 4]。它 ......
LeetCode 875. Koko Eating Bananas 二分答案
Koko loves to eat bananas. There are $n$ piles of bananas, the $i$th pile has $piles[i]$ bananas. The guards have gone and will come back in `h` hours ......
LeetCode 1011. Capacity To Ship Packages Within D Days 二分答案
A conveyor belt has packages that must be shipped from one port to another within `days` days. The ith package on the conveyor belt has a weight of $w ......
C# 对象序列化和反序列化复制
/// <summary> /// 对象深度Copy /// </summary> /// <typeparam name="T"></typeparam> /// <param name="obj"></param> /// <returns></returns> public static T ......
黑群晖DSM7.2安装虚拟机生成序列号
开启主板虚拟化！！！！ 存储空间系统格式btrfs 启用网卡Open VSwitch设置 安装套件Virtual Machine Manager 创建虚拟机 下一步直到完成，开启虚拟机 剩下就是链接助手链接虚拟机，配置一下就可以了 全部完成后进入系统，打开控制面板——信息中心 保存SN码和Mac地址 ......
python序列
* 鉴于序列协议的重要性，如果没有 __iter__ 和 __contains__ 方法，Python 会调用 __getitem__ 方法，设法让迭代和 in 运算符可 用。 # 猴子补丁 当一个类中缺少某个内置方法导致出现不可迭代或者是不可变对象的时候，可以在类的外面定义一个函数，用这个函数给类 ......
leetcode练习
## 分类 题单：[code](#code) 难度：[简单](#Simple) [中等](#middle) [困难](#hard) 类型：[数组](#数组) [链表](#链表) [字符串](#字符串) [二叉树](#二叉树) [排序](#排序) 解法：[递归和迭代](#递归和迭代) [滑动窗口 ]( ......
leetcode 546. 移除盒子
1. 题目 读题 链接：https://www.nowcoder.com/questionTerminal/a5390d76441647fbb182f34bee6a1ca7来源：牛客网一维消消乐 小v在vivo手机的应用商店中下载了一款名为“一维消消乐”的游戏，介绍如下： 1、给出一些不同颜色的豆子 ......
[LeetCode] 2461. Maximum Sum of Distinct Subarrays With Length K
You are given an integer array nums and an integer k. Find the maximum subarray sum of all the subarrays of nums that meet the following conditions: T ......
[LeetCode] 2222. Number of Ways to Select Buildings
You are given a 0-indexed binary string s which represents the types of buildings along a street where: s[i] = '0' denotes that the ith building is an ......
题解 序列合并
[题目链接](https://www.luogu.com.cn/problem/P1631) 首先不难想到，最小数的一定是 $a_1+b_1$，次小的数是 $a_1+b_2$ 和 $a_2+b_1$ 中小的。 得出结论，若 $a_i+b_j$ 是第 $k$ 小，那么 $a_{i+1}+b_j$ 和 ......
Leetcode日记
| 日期 | 题号 | 题目 | 解法 | 难度 | | | | | | | | 2023-07-11 | 2741 | [给定一个互不相同的正整数数组，找出**特别排列**（相邻元素互模任一为0）的总数目。取余](https://leetcode.cn/problems/special-permu ......
.net 序列化 反序列化
//反序列化：JsonConvert.DeserializeObject<T>(string json) //序列化：JsonConvert.SerializeObject(object obj) string jsonStr = "{\"name\":\"张三\",\"age\":\"10\"," ......
[LeetCode] 874. Walking Robot Simulation
A robot on an infinite XY-plane starts at point (0, 0) facing north. The robot can receive a sequence of these three possible types of commands: -2: T ......
[LeetCode] 2597. The Number of Beautiful Subsets
You are given an array nums of positive integers and a positive integer k. A subset of nums is beautiful if it does not contain two integers with an a ......