重力solution set
JAVA Set集合的深拷贝
之前在做统计的时候，用到Set集合，存储到Map中，但是因为是浅拷贝，导致数据错误问题。这里记录下如何深度拷贝Set 关于浅拷贝和深拷贝的的问题，请参考另一篇文章《JAVA 的深拷贝和浅拷贝》 简而言之：深拷贝是完全创建一个新的对象，是一个全新的对象。而浅拷贝仅仅复制所考虑的对象，而不复制它所引用的 ......
husky——The '.husky/pre-commit' hook was ignored because it's not set as executable
前言 系统：mac hint: The '.husky/pre-commit' hook was ignored because it's not set as executable. hint: You can disable this warning with `git config advic ......
Convex Sets
1. Affine and convex sets 1.1 Affine sets A set \(C\in\R^n\) is affine if the line through any two distinct points in \(C\) lies in \(C\), which mea ......
solution-CF1615F
LEGOndary Grandmaster https://www.luogu.com.cn/problem/CF1615F 神题！看到题解一眼就知道自己大概率想不出来了。 主要还是积累两个套路： Trick 1 考虑将原序列的奇数位位置上的数取反，惊讶地发现操作简化为了每次交换相邻两个数。显然地， ......
[Luogu NOIP 2023 模拟] Solution
这篇 blog 在我的博客后台躺了好几天了，只不过今天才记起来发。 种树 (plant) 首先看到因数个数，想到在质因数分解后的序列上考虑问题。进一步观察，每个不同质因子的贡献是独立的。 也就是说，我们单独考虑某一个质因子对答案的贡献，是这样的问题： 给长度为 \(n\) 的序列 \(a\) 和一个 ......
Solutions of Soil Salinization
Soil salinization prevention bases on avoiding excessive salt penetration. Even though plants require a certain amount of salts to develop, their need ......
JavaSE day05【泛型，数据结构，List接口，Set接口】测评题
选择题 题目1(单选): 查看下列代码,选出正确的传参( ) public class Test2 { public static void main(String[] args) { ArrayList<Integer> list1 = new ArrayList<Integer>(); Arra ......
JavaSEday05 泛型,数据结构,List,Set集合
javSE day05 泛型,数据结构,List,Set 今日目标 泛型使用 数据结构 List Set 1 泛型 1.1 泛型的介绍 泛型是一种类型参数，专门用来保存类型用的 最早接触泛型是在ArrayList，这个E就是所谓的泛型了。使用ArrayList时，只要给E指定某一个类型，里面所有用到 ......
The solution of soil erosion
Solution of soil erosion (1) Engineering measures: building terraces, damming and silting land, using earthwork and concrete works, fish scale pits, e ......
solutions to soil salinisation
1. Test soil for electrical conductance (EC).Salt raises the EC. 2. Make a site-specific management plan.Test for EC in zones radiating out from the b ......
A solution to land sailnization
Biologically improved saline-alkali land is barren and soil fertility is poor. Therefore, in the process of transformation, it is an important measure ......
Precise Temperature Control Solutions
Multi-span Temperature Controllers Provide high-performance multi-span temperature controllers to control temperatures across multiple zones or setpoi ......
Solutions to desertification
As global temperatures rise and the human population expands, more of the planet is vulnerable to desertification, the permanent degradation of land t ......
A solution to desertification
What is desertification? Desertification, the process by which natural or human causes reduce the biological productivity of drylands (arid and semiar ......
A solution to soil erosion
A specific measure to cope with soil erosion is to increase vegetation cover in China. How it works and its impact : Firstly, vegetation is the first ......
Set&List&Map
Map 概述 An object that maps keys to values. A map cannot contain duplicate keys; each key can map to at most one value. Map将key映射到value； Map的key不能重复，每个 ......
A solution to soil erosion
A special measure to cope with soil erosion is to increase vegetation cover in China. Vegetation is the first barrier to protect land from outside. Ta ......
Bioremediation Technology—— A Solution to Soil Pollution
Bioremediation Technology for Soil Polution 1. What is bioremediation technology? Bioremediation is a natural process based remediation technology for ......
Set---HashSet-LinkedHashSet
概述 Hash table and linked list implementation of the <tt>Set</tt> interface, with predictable iteration order. This implementation differs from <tt>Has ......
set/map作业解析
目录P761 【入门】明明的随机数P760 [NOIP2007 提高组] 统计数字P2814 数对P495 【入门】宇宙总统1P496 【入门】宇宙总统2P2843 宇宙总统3P2810 相邻字符对 P761 【入门】明明的随机数 对于一组数据完成完成"去重"与"排序"的工作。 分析 方法1：可以直 ......
some solutions for deforestation
Deforestation is a serious problem facing our planet,and it is critical that we find ways to solve it.Forests play a vital role in our ecosystem,provi ......
Set---SortedSet-NavigableSet-TreeSet
SortedSet 概述 A {@link Set} that further provides a <i>total ordering</i> on its elements.The elements are ordered using their {@linkplain Comparable n ......
The solution of P5339
problem 容斥好题，结果题解里面一堆 \(\text{NTT}\)。 如果我们去掉有多少个人喜欢什么东西的条件，那么这个题就直接枚举有 \(i\) 组同学会一起讨论蔡徐坤。这一个问题十分容易。 使用容斥原理来做，然后容斥的系数是 \((-1)^i\) 想必这个东西对于大家来说是十分简单的。 如 ......
The Solutions of Ocean Trash
10 Things You Can Do to Save the Ocean 1. Mind Your Carbon Footprint and Reduce Energy Consumption Reduce the effects of climate change on the ocean b ......
The Solutions of Ocean Trash
Everyone can do something to help solve the plastic pollution problem, and millions of people worldwide are already taking action to reduce their plas ......
qt 配置文件 settings
Qt如何读取和写入配置文件的数据呢？_qt配置文件读写-CSDN博客 这篇写的很好，照着做成功了，能读写配置文件 配置文件的路径在构造函数中设置。 Qt使用QSetting对ini配置文件进行读取和写入_.ini 文件读写 qsetting-CSDN博客 ......
并查集（Union Find Set）
1 基本介绍 并查集是一种用来判断两个元素之间是否有关系的集合。 它的基本思想为：对于两个元素，如果他们之间有关系，则将其连接，以此形成一颗树。 对于任意两个节点，如果它们有相同的根节点，则它们之间有关系。 2. 建立步骤 给定n个点，以及m个关系。 1. 初始状态 将每个节点的根节点都指向自己 f ......
CF390B Inna, Dima and Song Solution
转裁自我的洛谷博客 ：https://www.luogu.com.cn/blog/653832/solution-cf390b 题目传送门 思路： 如果 $b_i \le 1$ 则无解。 如果 ceil((double)b[i]/2)>a[i]，即最好情况下，两个人的音量平均，但是较大的音量还是大于 ......
Viper —— configuration solution for Go
1. support several formats of configuration config.yaml name: 'bobby' port: 12334 main.go to quick start package main import ( "fmt" "github.com/spf13 ......