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  • [Google] LeetCode 1610 Maximum Number of Visible Points 极角排序2022-08-23 03:00:24

    You are given an array points, an integer angle, and your location, where location = [posx, posy] and points[i] = [xi, yi] both denote integral coordinates on the X-Y plane. Initially, you are facing directly east from your position. You cannot move from

  • PAT Advanced 1024 Palindromic Number(25)2022-08-22 22:05:12

    题目描述: A number that will be the same when it is written forwards or backwards is known as a Palindromic Number. For example, 1234321 is a palindromic number. All single digit numbers are palindromic numbers. Non-palindromic numbers can be paired with pali

  • type 和 interface的区别2022-08-22 17:31:01

    type 和 interface的区别 一咻 世界都变了   3 人赞同了该文章   相同点 1、都可以描述一个对象或者函数 【interface】 interface User { name: string, age: number } interface SetUser { (name: string, age: number) : void } 【type

  • PowerShell教程 - 数值管理(Working With Number)2022-08-22 08:33:38

    更新记录 转载请注明出处。 2022年8月22日 发布。 2022年8月18日 从笔记迁移到博客。 数值管理(Working With Number) 生成随机数 Get-Random 实例: 限制范围: 注意:包括最小数,但不包括最大数 Get-Random -Minimum 0 -Maximum 2 限制个数: Get-Random -Count 2

  • [Google] LeetCode 1937 Maximum Number of Points with Cost2022-08-22 05:30:08

    You are given an m x n integer matrix points (0-indexed). Starting with 0 points, you want to maximize the number of points you can get from the matrix. To gain points, you must pick one cell in each row. Picking the cell at coordinates (r, c) will add po

  • 1010 Radix(25分)2022-08-22 01:02:30

    Given a pair of positive integers, for example, 6 and 110, can this equation 6 = 110 be true? The answer is yes, if 6 is a decimal number and 110 is a binary number. Now for any pair of positive integers N1​ and N2​, your task is to find the radix of on

  • 2022.8.21 JUC2022-08-21 21:31:15

    1、什么是JUC 1、什么是juc(学习方法:官方文档+源码)      JUC —— (java.util.concurrent)是一个包名的缩写,java工具类下的一个并发功能的包。 该包下存放的均为多线程相关类, Runnable 没有返回值、效率相比入 Callable相对较低,但callable可以返回结果,也可以抛出异常,两者都属于j

  • "蔚来杯"2022牛客暑期多校训练营3 C-Concatenation2022-08-20 18:31:27

    问题描述 NIO was the king of the OIN Kingdom. He had NNN children and wanted to teach them how to count. In the OIN Kingdom, pental is used in counting, so his children can only use 0, 1, 2, 3, and 4 to represent a number. One day, NIO asked his children to w

  • 871. Minimum Number of Refueling Stops2022-08-20 13:33:25

    A car travels from a starting position to a destination which is target miles east of the starting position. There are gas stations along the way. The gas stations are represented as an array stations where stations[i] = [positioni, fueli] indicates tha

  • c语言中使用冒泡排序法对数组进行排序2022-08-19 00:04:43

      001、 #include <stdio.h> #define NUMBER 5 void psort(int x[], int n) { int i, j; for(i = 0; i < n - 1; i++) //冒泡排序法, 外层循环每循环一次,将最大值,移动至最左端 { for(j = n - 1; j > i; j

  • [Typescript] Pick partially object type with indexed access types2022-08-18 19:32:44

    type PartOfWindow = { [Key in | "document" | "navigator" | "setTimeout"]: Window[Key] } /* type PartOfWindow = { document: Document; navigator: Navigator; setTimeout: (handler: TimerHandler,

  • 将一个list均分成n个list2022-08-18 11:33:49

    package org.apache.test; import java.util.ArrayList; import java.util.List; public class JavaDemo { /** * 将一个list均分成n个list * * @param source * @return */ public static <T> List<List<T>> averageAssign(List&l

  • 青蛙跳台阶2022-08-16 16:36:15

    1. 普通跳台阶 题目地址(70. 爬楼梯) https://leetcode.cn/problems/climbing-stairs/ 题目描述 假设你正在爬楼梯。需要 n 阶你才能到达楼顶。 每次你可以爬 1 或 2 个台阶。你有多少种不同的方法可以爬到楼顶呢? 示例 1: 输入:n = 2 输出:2 解释:有两种方法可以爬到楼顶。 1. 1

  • JSTL概述和JSTL常用标签if2022-08-16 10:31:26

    JSTL概述   1.概念:JavaServlet Pages Tag Library(JSP标准标签库)       是由Apache组织提供的开源的免费的jsp标签  <标签>   2.作用:用于简化和替换jsp页面上的java代码   3.使用步骤:     1.导入jstl相关jar包     2.引入标签库:taglib指令:<%@ taglib%>

  • [Typescript] Extract & Exclude2022-08-15 19:01:55

    Extract is useful for obtaining some sub-part of a type that is assignable to some other type. type FavoriteColors = | "dark sienna" | "van dyke brown" | "yellow ochre" | "sap green" | "titanium white

  • Java中Get和Post的使用2022-08-14 21:30:08

    原文链接 1 Get请求数据 项目地址:https://github.com/Snowstorm0/learn-get-post 1.1 Controller 文件名MyController,内容为: @RestController @RequestMapping("/homepage") public class MyController { @Autowired MyService myService; @GetMapping("/learnGe

  • Codeforces 121 E2022-08-14 00:31:18

    感觉我数据结构有些弱,最近开始练习难道为2300~2700的数据结构题。 首先我们发现,lucky number不会太多,最多就是\((2^1+2^2+2^3+2^4+1)=31\)个(最后加\(1\)是对于所有\(x>7777\)的数,最近的lucky number应该是\(44444\)) 这里我们维护的东西有些奇特——我们维护\(val_{i}=L-a_{i}\)的

  • 表结构设计-冗余字段2022-08-13 11:30:41

    正文: 但是范式设计同样也有缺点: 表范式标准化,等级越高,表数量就越多。比如 2NF 比 1NF 可能要多几张表,3NF 比 2NF 可能又要多几张表等等。 表数量越多,查询时可能需要关联的表就越多。我们知道,检索多表关联的开销比检索单表的开销要大的多。 综上,我们需要结合范式设计的优点,并且

  • LeetCode 673 Number of Longest Increasing Subsequence2022-08-13 02:01:10

    Given an integer array nums, return the number of longest increasing subsequences. Notice that the sequence has to be strictly increasing. Solution 我们需要求出最长长度序列的个数。不妨用两个数组 \(dp1, dp2\). 其中 \(dp1[i]\) 表示以 \(i\) 结尾的最长递增序列的

  • c 语言中实现数组元素的逆向排列2022-08-13 01:02:27

      001、 #include <stdio.h> #define NUMBER 7 int main(void) { int i, temp; int array[NUMBER]; puts("please input the arrays."); for(i = 0; i < NUMBER; i++) { printf("NO.%d: ", i + 1); scanf(&q

  • c语言中的对象式宏2022-08-13 01:01:08

      001、 #include <stdio.h> #define NUMBER 5 // 此处为对象式宏, 运行程序时, main函数体内的NUMBER将被替换为5 int main(void) { int i; int tensu[NUMBER]; int sum = 0; printf("please input %d scores.\n", NUMBER);

  • 为啥fellow是尊称2022-08-12 13:00:30

    英国皇家学会(The Royal Society),全称"伦敦皇家自然知识促进学会",成立于1660年。学会的院士名字后缀会加上FRS勋衔(Fellow Royal Society)。 当初Fellow可能就是”同仁“的意思。语法?Touching for ‘the King’s evil’: a short history The Association for Computing Machine

  • 自己这个整理的sql相关2022-08-12 10:34:26

    创建用户: SQL> create user Oracle identified by qjx 2 default tablespace users 3 temporary tablespace temp; 用户已创建。 SQL> connect system/qjx138 已连接。 SQL> grant connect, resource to Oracle; 授权成功。 SQL> spool off; 创建表代码: SQL> create

  • ECMAScript中基本的要素2022-08-12 10:04:06

    1.基本数据类型:Undefined、Null、Boolean、Number和String 2.与其他语言不同,JS没有为整数和浮点数值分别定义不同的数据类型,Number类型可用于表示所有数值 3.Object类型是JS中所有对象的基础类型 4.严格模式为JS中容易出错的地方施加了限制 5.JS提供了算术操作符、布尔操作符、关

  • LeetCode 1710. Maximum Units on a Truck2022-08-12 08:30:08

    原题链接在这里:https://leetcode.com/problems/maximum-units-on-a-truck/ 题目: You are assigned to put some amount of boxes onto one truck. You are given a 2D array boxTypes, where boxTypes[i] = [numberOfBoxesi, numberOfUnitsPerBoxi]: numberOfBoxesi is the n

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