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Kattis - A Complex Problem (The 2023 ICPC Rocky Mountain Regional Contest)
Intro This was one of the problems I didn't do during the regional contest. One of my teammates solved it. Observation There are few things to note. F ......
The governance measures of marine oil pollution
The governance measures (1). Preventive measures. Prevention is one of the most effective control methods, including the following aspects: a. Strengt ......
kubeadm部署的k8s证书过期问题 k8s问题排查：the existing bootstrap client certificate in /etc/kubernetes/kubelet.conf is expired
解决问题： 估计跟移动有关，下面那个没解决问题，是因为在原有文件的基础上修改的吧？而这里直接是移走，重新生成了新的。不太清楚是不是这个原因。 $ cd /etc/kubernetes/pki/ $ mv {apiserver.crt,apiserver-etcd-client.key,apiserv ......
The PRC's Policy of Tackling Water Pollution
THE POLICY CONTEXT The industrial water management system in the PRC is spread over two phases (see Figure 1). The first phase is "before-process", wh ......
the use of photovoltaic to prevent and control desertification
Land desertification is one of the main causes of sandstorm disaster. With the further intensification of global warming, desertification is becoming ......
Get environmentally friendly, biodegradable plastics into the market
Now digital techs empower plastic pollution combat in China, and our new material combined with non-enzymic hydrolysis, water dissolution and biodegra ......
The 10th Jimei University Programming Contest
外校打星队伍，排名22/450，还算凑合吧。 A. A+B问题 直接枚举进制 #include <bits/stdc++.h> using namespace std; using vi = vector<int>; void solve() { string str; vi a, b, s; ci ......
The methods for Global Warming
The methods for deal with Global Warming: China's emission reduction measures to address climate change: mainly through market means, supplemented by ......
How does China solve the water pollution?
How does China solve the water pollution? One River, One Plan and One Map With the continuous development of China's economy and society, sudden water ......
The use of green energy can effectively solve the problem of air pollution
The use of green energy can effectively solve the problem of air pollution 一、the operation of green energy Green energy refers to a way of producing a ......
EF报错：Unable to create an object of type 'XXXXXXX'. For the different patterns supported at design time, see https://go.microsoft.com/fwlink/?linkid=851728
这个是在EF迁移的时候报错： 解决方案：修改你的MyDbcontext： 代码如下： public class StoreDbContexttFactory : IDesignTimeDbContextFactory< ‘你的类名’> { public ‘你的类名’CreateDbContext(s ......
The Measures of Ocean Trash
Ocean Trash Solutions: 7 Things You Can Do Today Everyone can do something to help solve the plastic pollution problem, and millions of people worldwi ......
第一次用Java编写”Hello world!“
HelloWord 1.随便新建一个文件夹，存放一个代码 2.新建一个java文件 文件后缀名为java Hello.java 【注意点】系统可能没有显示文件后缀名，我们需要手动打开 3.编写代码 public class Hello{public static void main(String[] ......
HttpResponse，render，redirect
from django.shortcuts import render,HttpResponse,redirect HttpResponse 主要用于直接返回字符串类型的数据 def index(request): return HttpResponse('hello') # pass # 相当于r ......
Improving The Fetch XML Performance using Latematerialize -如何使用Latematerialize提高Fetch XML 查询性能
假设要从包含 100,000 条记录、100 多列的表中提取 500 个，根据过滤条件，需要几分钟才能获取记录。 原因是应用程序传统上 fetchxml 首先获取所有 100,000 条记录和数百列。然后它根据查询执行过滤器以获取记录。 为了克服这一挑战，如果我们一个查询，首先提取所需 500 条记 ......
Introducing the core concepts of Kafka
Introduction I have learnt the kafka since 5 years, I believe I learnd somthing, It is on time for improving english. So I decided to pick up my blogs ......
The 2021 ICPC Asia Macau Regional Contest
https://codeforces.com/gym/104373 A. So I’ll Max Out My Constructive Algorithm Skills 随便选一条路径，若不合法则 reverse 即可。 E. Pass the Ball! 大小相等的置换环显然可以合并，大小不同的 ......
The art of shellcode
目录1-如何编写shellcode1-1 纯手搓1-1-1 纯汇编1-1-2 内联汇编1-1-3 使用tiny_libc1-2 借助工具1-2-1 pwntools的shellcraft1-2-2 alpha31-2-3 AE641-2-4 shellcode encoder1-2-5 msf生成1 ......
Codeforces Round 428 (Div. 2) B. Game of the Rows
题目链接 题面翻译 现在有 \(K\) 个队，飞机有 \(N\) 排座位，每排能坐 \(8\) 个人，不同队伍的人不能坐相邻的位置。 相邻情况有 \(5\) 种 \((1, 2), (3, 4), (4, 5), (5, 6), (7, 8)\)。请问这 \(n\) 排座位是否够坐。 （\(K\) ......
CF1381D The Majestic Brown Tree Snake
原题链接 膜拜 APJ 大神。 某人说这个题让他联想到“詹天佑”了。 考虑将图画成——给定链在最上方，不在给出链上的点都相当于挂在这条链上某个点上的树。 有两种情况：一种情况是进入一颗树，在其中完成调头，然后原路返回；还有一种情况是进入一颗树，然后出去的时候走向进来的反方向，然后再倒着回去。 第一种 ......
The Prevention of Water Contamination
The prevention and control of water contamination should adhere to the principles of giving priority to prevention, protection, combination of prevent ......
How To Solve The Problem Of Air Pollution
How To Solve The Problem Of Air PollutionThe report "China's Carbon Neutrality and Clean Air Synergy Pathway (2023)" was published in Beijing on Novem ......
npm WARN exec The following package was not found and will be installed: create-remix@2.2.0
报错 执行 npx create-remix@latest --template ryanflorence/remix-tutorial-template 提示如下： npm WARN exec The following package was not found and will be inst ......
【Azure Durable Function】PowerShell Activity 函数遇见 Newtonsoft.Json.JsonReaderException: The reader's MaxDepth of 64 has been exceeded.
问题描述 创建PowerShell Azure Durable Function，执行大量的PowerShell脚本操作Azure Resource，遇见了一个非常非常奇怪的问题： Function 'Hello1 (Activity)' failed with an error. Reason: ......
The following perl modules required by RepeatModeler are missing from your system. Please install these first: JSON; JSON::PP; File::Which
001、问题 RepeatModeler 编译安装报错如下： 002、尝试逐个安装确实的perl模块； 也是各种问题； 最后不想折腾， 就大力出奇迹，全安装， 可一次解决所有报错； (base) [root@pc1 RepeatModeler-2.0.2a]# yum -y install perl ......
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 ......
[CF1588F] Jumping Through the Array
不妨认为 \(n,q\) 同阶。 考虑根号重构。如果没有第 3 种操作的话，我们每 \(\mathcal O(\sqrt n)\) 操作整体更新一次，每个询问只需要考虑块内的修改所在置换环上有多少 \([l,r]\) 内的数。这个是容易 \(\mathcal O(n\sqrt n)\) 做的。 然后 ......
“Job for network.service failed because the control process exite”问题
[root@node3 ~]# service network restart Restarting network (via systemctl): Job for network.service failed because the control process exited with err ......
[Javascript] Prevent JavaScript Object Tampering with the SES Library harden Function
https://www.npmjs.com/package/ses Lockdown The lockdown() function also tames some objects including regular expressions, locale methods, and errors. ......