dita directory the outside
How to Master the Popular DBSCAN Clustering Algorithm for Machine Learning
Overview DBSCAN clustering is an underrated yet super useful clustering algorithm for unsupervised learning problems Learn how DBSCAN clustering works ......
The 2022 ICPC Asia-East Continent Final Contest (EC-Final 2022)
比赛链接 没做完。 A. Coloring 有 \(n\) 个元素，第 \(i\) 个元素有价值 \(w_i\)，颜色 \(c_i\)。给定 \(s\)，初始时只有 \(c_s=1\)，其余 \(c_i\) 均为 \(0\)。 可以进行任意操作：选择一个 \(1 \le i \le n\)，花费 \ ......
SP2-0618: Cannot find the Session Identifier. Check PLUSTRACE role is enabled SP2-0611: Error enabling STATISTICS report
报错信息： SP2-0618: Cannot find the Session Identifier. Check PLUSTRACE role is enabledSP2-0611: Error enabling STATISTICS report 说明： Oracle下普通用户缺少set aut ......
win10安装git fatal: open /dev/null or dup failed: No such file or directory错误解决方法
https://files.cnblogs.com/files/netlock/null.zip?t=1703226893&download=true 文件地址 解决方法：1.C:\Windows\System32\drivers\null.sys 这个文件损坏，可以从网上下载win7、win10对 ......
How to permanently delete a file stored in GIT (both from the local and remote repositories)?
First run git filter-branch -f --index-filter "git rm -rf --cached --ignore-unmatch FOLDERNAME" -- --all Then shrink the .git folder rm -rf .git/refs/ ......
CF1178G The Awesomest Vertex
CF1178G The Awesomest Vertex 给定一棵根为 \(1\) 的有根树，每个节点有两个权值 \(a[i]\) 和 \(b[i]\) 。定义 \(R(v)\) 为 \(v\) 祖先的集合（包括自己），则一个节点 \(v\) 有多棒取决于其真棒程度，真棒程度是这样定义的： \[\l ......
The 1st Universal Cup. Stage 0: Nanjing (Trial Contest)
比赛链接 题面懒得写了。 A. Stop, Yesterday Please No More 袋鼠移动相当于边界和洞移动。通过模拟可以得出：不考虑洞，移动后剩余袋鼠的矩形。以及假设洞在原点，移动后形成的轨迹形状。 枚举洞在哪个位置，多干掉的袋鼠就是两个几何图形的交。由于洞的移动轨迹较复杂，我们考虑让 ......
Maven-Introduction to the Dependency Mechanism | Maven实战--- dependencies与dependencyManagement的区别
Maven – Introduction to the Dependency Mechanism https://maven.apache.org/guides/introduction/introduction-to-dependency-mechanism.html#:~:text=The de ......
vscode 错误 go: go.mod file not found in current directory or any parent directory; see 'go help modules'
前言 安装VSCODE 后，新建立的GO文件按F5出错。go: go.mod file not found in current directory or any parent directory; see 'go help modules' 处理步骤 开启go modules功能 命令行输入 go ......
The 2nd Universal Cup. Stage 3: Binjiang
比赛链接 没做完。 A. Almost Prefix Concatenation 给定字符串 \(S,T\)。称一个串是好的，当且仅当可以通过修改不超过一个字符使其成为 \(T\) 的前缀。 称一个把 \(S\) 划分成 \(n\) 个非空子串 \(S_1,S_2,\cdots,S_n\) 的方案是 ......
React项目中报错：Parsing error: The keyword 'import' is reservedeslint
记得更改完配置后，要重启编辑器（如：VSCode）!!! 记得更改完配置后，要重启编辑器（如：VSCode）!!! 记得更改完配置后，要重启编辑器（如：VSCode）!!! 这个错误通常发生在你尝试在一个不支持 ES6 模块语法的环境中使用 import 关键字。 ESLint 默认使用的是 ES5 ......
Nacos启动：[NACOS HTTP-POST] The maximum number of tolerable server reconnection errors has been reached
一、表象 二、分析 源码： public HttpRestResult<String> httpPost(String path, Map<String, String> headers, Map<String, String> paramValues, String encode, long re ......
Github Actions - Error: The connection to the server localhost:8080 was refused - did you specify the right host or port?
Run kubectl apply -f eks/aws-auth.yaml kubectl apply -f eks/aws-auth.yaml kubectl apply -f eks/deployment.yaml kubectl apply -f eks/service.yaml shell ......
The Missing Semester of Your CS Education----shell工具和脚本
一.shell脚本 1.$的关键字 $0 - 脚本名 $1 到 $9 - 脚本的参数。 $1 是第一个参数，依此类推。 $@ - 所有参数 $# - 参数个数 $? - 前一个命令的返回值 $$ - 当前脚本的进程识别码 !! - 完整的上一条命令，包括参数。常见应用：当你因为权限不足执行命令失败时 ......
How can I do to protect the Environmental
How can I do to protect the Environmental Protecting the environment is an important responsibility that we all share. Here are some simple steps you ......
Why caused the dead factory?
The death of a factory can be caused by various factors, which can be broadly categorized into economic, social, and environmental reasons. Some of th ......
Should be the workers need to dress uniform for work?
The need for workers to dress in uniforms for work depends on the specific industry, company, and job role. In some cases, uniforms may be required fo ......
Why the developed country choose the countries of southeast Asia to build processing factory used their labour force?
The developed countries choose countries in Southeast Asia to build processing factories and utilize their labor force for various reasons. Some of th ......
An Introduction to Bioinformatics Algorithms, Neil C. Jones and Pavel Pevzner, the MIT Press, 2004.
An Introduction to Bioinformatics Algorithms, Neil C. Jones and Pavel Pevzner, the MIT Press, 2004. This introductory text offers a clear exposition o ......
B. Preparing for the Contest
原题链接 快速读题 给出一个序列，使其满足\(a[i]>a[i-1],i>1\)成立的次数恰好为k 思路 只要满足条件的序列都算作成立，我们就可以特殊化 先做出一个单增序列，由于前半部分所有元素都满足条件，所以前半部分保留(k+1)个元素，翻转后（n-k-1）个元素 但是sort默认升序，所以我们倒 ......
error: Your local changes to the following files would be overwritten by merge 解决方案
团队其他成员修改了某文件并已提交入库，你在pull之前修改了本地该文件，等你修改完代码再pull时，这时会报错如下错误 根据是否要保存本地修改，有以下两种解决方案 2.1 保留修改执行以下三条命令 git stash #封存修改 git pull origin master git stash po ......
DBus.server服务启动报错->"/etc/selinux/*/contexts/dbus_contexts": No such file or directory
系统启动后很多使用dbus1的命令没法使用，查看日志发现dbus.service没有启动，并伴随下面报错： Failed to start message bus: Failed to open "/etc/selinux/targeted/contexts/dbus_contexts": No s ......
qtcreator 在线dbg嵌入式 异常 index cache: could not make cache directory: Permission denied
1. 主机系统 Linux jz 6.2.0-37-generic #38~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Thu Nov 2 18:01:13 UTC 2 x86_64 x86_64 x86_64 GNU/Linux 2. 嵌入式系统 Linux ls 4.1 ......
MySQL server is running with the --super-read-only option的解决办法
原因 数据库是只读模式 解决办法 修改为读写模式 mysql -uroot -p你的密码 进入mysql select @@read_only; set global read_only=0; # 顺便设置可远程连接（不需要可跳到flush privileges） use mysql; update ......
CentOS7 yum错误：One of the configured repositories failed (Unknown)
一、现象 二、原因 可能会有其他原因造成该问题（如，网络问题）。我这边的问题是红框中指定镜像重复，导致yum命令执行失败。 三、解决 cd /etc/yum.repos.d 排查重复的repo并将其删除。 ......
Nacos启动：[NACOS HTTP-POST] The maximum number of tolerable server reconnection errors has been reached
一、表象 二、分析 源码： public HttpRestResult<String> httpPost(String path, Map<String, String> headers, Map<String, String> paramValues, String encode, long re ......
WMTS . WMS focuses on flexibility in the client request enabling clients to obtain exactly the final image they want.
WMTS - Introduction — OGC e-Learning 2.0.0 documentation https://opengeospatial.github.io/e-learning/wmts/text/main.html WMTS - Introduction Introduct ......
CF1861C-Queries-for-the-Array-题解
title: CF1861C Queries for the Array 题解 date: 2023-09-06 07:53:53 categories: - 题解 因为插入和删除操作都在队尾，所以对序列前缀分析一下： 若一个序列的答案为 YES，那么它前缀的答案也为 YES。（对于没检查过的序列） ......
Nacos启动：[NACOS HTTP-POST] The maximum number of tolerable server reconnection errors has been reached
一、表象 二、分析 源码： public HttpRestResult<String> httpPost(String path, Map<String, String> headers, Map<String, String> paramValues, String encode, long re ......