pollution land
Water Pollution
causes:1. Industrial pollution: industrial wastewater, which contains many pollutants and complex compositions, is not only not easy to purify in wate ......
3 ways light pollution harms the planet - and what we can do about it
Light pollution not only impacts the environment, but our health too. ·Global light pollution has increased by 49% over 25 years to 2017, new research ......
Air Pollution in China
Detail Air pollution Of the 522 cities monitored in 2005, 11% were considered heavily polluted and only 56% had air quality that met the State Environ ......
Water Pollution
What Is Water Pollution? Water pollution occurs when harmful substances—often chemicals or microorganisms—contaminate a stream, river, lake, ocean, aq ......
Water pollution
Water pollution refers to the reduction or loss of water use value caused by harmful chemicals, which pollutes the environment. ......
Water Pollution
Human activities will make a large number of industrial, agricultural and domestic waste into the water, so that the water is polluted. At present, mo ......
Air Pollution
What Is Air Pollution? Smoke from a factory. Image credit: Anastasiia Tymoshenko/Shutterstock Since toxins accumulate up the animal food chain, top pr ......
Light Pollution
Light pollution, unwanted or excessive artificial light. Like noise pollution, light pollution is a form of waste energy that can cause adverse effect ......
Indoor air pollution: What causes it and how to tackle it
Most people think of air pollution as something that comes from factories or motor vehicles. However, did you know that the air inside your home or pl ......
ERA5 Land中‘expver’变量的处理方法
近日在搞数据的时候发现ERA5 Land新更新的数据中有一个‘expver’的变量，导致数据并不连续。官方解释如下: ERA5 每小时和每月数据延迟 3 个月提供。这意味着一个月后，另一个月的 ERA5 数据将写入数据集。 ERA5T（近实时）初步数据用于填补ERA5数据结束与当前日期前5天之间的空 ......
[ARC072E] Alice in linear land 题解
[ARC072E] Alice in linear land 首先，一个 trivial 的想法是记 \(f_i\) 表示第 \(i\) 步前离终点的距离，于是 \(f_i=\min\Big(f_{j-1},|f_{j-1}-d_i|\Big)\)。 然后，我们设 \(f_i'\) 表示在修改第 \ ......
[QOJ4815] Flower's Land
简要题意：给出一个 \(n\) 个点的树，对某个点 \(i\) 求包含某一个点的大小为 \(k\) 的权值最大的连通块，一个连通块的权值是其所有点的权值之和。 \(n\le 40000,k\le \min(3000,n)\) 这个树上背包很难直接解决，考虑一种变体的树形背包：点分治。 点分治后，设分 ......
【题解】P2900 [USACO08MAR] Land Acquisition G
题目链接：[P2900 [USACO08MAR] Land Acquisition G](https://www.luogu.com.cn/problem/P2900) 我们通过题目可以得出一个较为清晰的结论： - 我们将所有的矩形排列起来，可以发现最后被完全包含在另一个矩形内的矩形是没有意义的。 ......
【Land of Lisp】一次练习：巫师文本冒险游戏
# 绪论 Common Lisp是一门多范式语言，支持多种编程模式，包括面向对象编程、函数式编程。但Common Lisp鼓励函数式编程，并且包含有许多函数式编程相关的功能。 《Land of Lisp》是一本寓教于乐的学习Lisp语法的书籍。这本书配以漫画插图来进行表达，并且将小游戏的制作作为演示 ......
JLR DOIP VCI SDD Pathfinder Interface: The Best Choice for Jaguar Land Rover Lovers
If you are a Jaguar Land Rover (JLR) enthusiast, you must be familiar with the importance of having the right diagnostic tool at hand. In this blog po ......
QOJ # 6504. Flower's Land 2
[题面传送门](https://qoj.ac/problem/6504) 感觉，非常高妙的随机化！ 考虑怎么判定一个序列合法，将每种颜色的奇数位置看成左括号，偶数位置看成右括号，则一个序列合法当且仅当其括号序列合法。 现在带修，我们维护的东西需要满足如下性质： - 可逆：将相邻奇数位的信息和偶数位的 ......
带你读论文丨S&P21 Survivalism: Living-Off-The-Land 经典离地攻击
这篇文章属于系统分析类的文章，通过详细的实验分析了离地攻击（Living-Off-The-Land）的威胁性和流行度，包括APT攻击中的利用及示例代码论证。 ......
QOJ 6504 Flower's Land
巧妙！ ## 简要题意 一个序列包含 $0, 1, 2$，有两种操作： 1. 给定区间 $[l, r]$，令其中所有 $a_i\gets (a_i + 1)\bmod 3$。 2. 给定区间 $[l, r]$，问如果每次删去该区间内的两个相邻相等元素，最终能不能将其删空。 $1 \le n,q \l ......
hackthebox pollution insane
start of namp it's bannber tells us it's apache also running debian and more importatntly we get a php session cookie id back so chances are this is g ......
P2900 [USACO08MAR] Land Acquisition G
# P2900 [USACO08MAR] Land Acquisition G ## 题意 Farmer John 准备扩大他的农场，眼前他正在考虑购买 $N$ 块长方形的土地。 如果 FJ 单买一块土地，价格就是土地的面积。但他可以选择并购一组土地，并购的价格为这些土地中最大的长乘以最大的宽。比如 ......
QOJ 6504. CCPC Final 2022 D Flower's Land 2题解
# QOJ 6504. CCPC Final 2022 D Flower's Land 2题解 ## 题意简述 给你一个只含 $0,1,2$ 的序列，相邻两个相同的数字可以直接消掉。 询问包含两种 - 区间所有数 $+1$ 并对 $3$ 取模。 - 求一段区间能否用上述消除方式消完。 ### 样例输 ......