connection the localhost refused

P2973 [USACO10HOL] Driving Out the Piggies G 臭气弹

[题目链接](https://www.luogu.com.cn/problem/P2973 "题目链接") 题目: 奶牛们建立了一个随机化的臭气炸弹来驱逐猪猡。猪猡的文明包含1到N (2 using namespace std; const int maxn=350; const int eps=1 ......
臭气 Driving Piggies P2973 USACO

cpp test write content speed to ssd and usual disk respectively 1M,10M,100M rows data,the fact has illustrated the write speed of ssd is 4-5 times faster than usual disk

#include <chrono> #include <ctime> #include <fstream> #include <iomanip> #include <iostream> #include <sstream> #include <thread> #include <uuid/uuid. ......
speed write usual disk respectively

git add 时报错 warning: in the working copy of 'package-lock.json', LF will...

来源:https://blog.csdn.net/qq_43842093/article/details/128471953 问题: 执行 git add . 时报错: 原因: 换行符的问题, Windows下换行符和Unix下的换行符不一样,git会自动转换。 解决办法: 执行如下命令: git ......
package-lock 时报 warning package working

Some details for the Shell which I think is important

拼接字符串, 在定义好变量之后, 输出时候的拼接, 注意无意输出一些空格 。 比如: #!/bin/bash a1="China" a2="${a1}, Japan and Korean are the three important countries in east asia. \n" a3=" ......
important details Shell which think

数据库管理工具远程连接MySQL实例服务失败Host ... is not allowed to connect to this MySQL server问题。

> MySQL社区版数据库8.0版本 [添加账号、分配权限、删除账号](https://dev.mysql.com/doc/refman/8.0/en/creating-accounts.html) [MySQL安全连接失败问题排查](https://dev.mysql.com/doc/refman ......
MySQL 管理工具 实例 allowed connect

Apr 2021-Lucid Dreaming for Experience Replay: Refreshing Past States with the Current Policy

本文提出了用于经验回放的清醒梦(LiDER),一个概念上的新框架,允许通过利用智能体的当前策略来刷新回放体验。 ......

[刷题笔记] ybt1250:The Castle

[Problem](http://ybt.ssoier.cn:8088/problem_show.php?pid=1250) ### Solution 显然bfs,只不过扩散的时候需要判断墙 那么如何判断墙呢?题目只给出了每个方块墙方向的和 原来的思路是可以暴力,很复杂但是可做,代码就不给了。 后来 ......
笔记 Castle 1250 ybt The

「解题报告」CF768G The Winds of Winter

真的不难,为啥是 3300\*。还是模拟赛 T3,很气啊,为什么不先看这个题。 首先贪心很容易发现一定是将当前子树大小最大的那棵树的某个子树移动到最小的那个树内。那么我们记移动的这个子树的大小为 $x$,所有树中最小的树大小为 $a$,最大的为 $c$,次大的为 $b$,那么我们就是在最小化 $\m ......
报告 Winter Winds 768G 768

2023-06-03 Couldn't find a tree builder with the features you requested: lxml. Do you need to install a parser library?

运行一个py文件,问题定位到: html=self.get_html(url) soup=BeautifulSoup(html,'lxml') 解决方案:打开cmd,运行下面代码: pip install lxml 等待安装成功,再次运行py文件就不会报这个错了。 ......
requested you features builder install

P1545 [USACO04DEC] Dividing the Path G 题解

丢一发好理解又好写的线段树优化dp。 [题目传送门](https://www.luogu.com.cn/problem/P1545 "题目传送门") ### 简要题意 给定一个长为 $l$ 的线段,求出尽量少的不相交区间覆盖整段线段,要求题目给的所有子区间只被 $1$ 个区间覆盖。 ### 分析 显 ......
题解 Dividing P1545 USACO 1545

首次进入Mysql修改密码报“The MySQL server is running with the --skip-grant-tables option so it cannot execute”--九五小庞

第一次安装完mysql,修改默认密码的时候,报“The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement”。 先刷新mysql然后再重新修改密码即可。 mys ......

[LeetCode] 2101. Detonate the Maximum Bombs

You are given a list of bombs. The range of a bomb is defined as the area where its effect can be felt. This area is in the shape of a circle with the ......
LeetCode Detonate Maximum Bombs 2101

How to fix the for...in loop errors in Python All In One

How to fix the for...in loop errors in Python All In One Python 3 TypeError: string indices must be integers ......
errors Python in loop How

1819B - The Butcher (思维)

大意:有一个大矩形,每次可以横着切或者竖着切,给你n个小矩形,问你原来的大矩形的宽高 思路:可以发现,最多有两种可能,找到所给矩形的宽和高的最大值,模拟check() 知识点:LL H=*max_element(a.begin(), a.end());数组最大值 ve.emplace_back(H, ......
思维 Butcher 1819B 1819 The

The 'Access-Control-Allow-Origin' header contains multiple values'*, *', but only one is allowed.

**报错内容** The 'Access-Control-Allow-Origin' header contains multiple values '*, http://192.168.237.131', but only one is allowed. Have the server send ......

Connection is not available 解决方案

在最近程序中 发现时不时”死机,无响应“的情况,经查看日志得知 用的是官方提供的 jdbcTemplete 工具 数据源连接池里面的资源全部不可用了, 是什么原因呢? 经查悉,原来是有人在写sql的时候,进行了全表查询并且数据较大,导致响应未果,多次请求以后就消耗掉了所有的连接池里面的资源 都在卡住 ......
Connection available 解决方案 方案 not

ubuntu报错:The following signatures couldn't be verified because the public key is not available 解决办法

当在ubuntu中加入了第三方源,没有设置公钥 更新索引的时候就会提示 ```bash The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 082AB56BA ......

w task 2 - the tasks

Understand the task Break the task into parts Methods, techniques lots of practices feedback Four scoring criteria task response coherence and cohesio ......
tasks task the

选修-2-Where does the error come from?

[CLICK](https://blog.csdn.net/qq_38689352/article/details/114776396) # 1. Error的来源 error实际来源于`bias`和`variance`. ![image](https://img2023.cnblogs.com/b ......
Where error does come from

LORD OF THE ROOT靶场渗透实战

### 知识点 **1. 端口碰撞** 端口碰撞(Port Knocking)是一种安全技术,用于隐藏和保护网络服务器。**该技术通过发送一系列特定的数据包,来触发服务器开放指定端口**。在没有收到这些特定数据包的情况下,服务器的端口会一直处于关闭状态,从而增强服务器的安全性。 通常,端口碰撞技术将 ......
靶场 实战 LORD ROOT THE

不要将localhost与127.0.0.1混用了。

在一般的认知中,localhost与127.0.0.1是相同的意思,因为在本地域名解析中,会把localhost直接转换为127.0.0.1 但在http请求中,千万不要混用这两个名称,今日入坑,掉了3个小时。 在请求的过程中, 请求头中会携带你请求的host,一些后端的接口,会对host进行认证 ......
localhost 127

HDU1028 Ignatius and the Princess III

## Description ![](https://s1.ax1x.com/2023/06/01/p9ztpdJ.png) 题意:给出 $n(1\le n\le 120)$,求出 $n$ 的整数划分方案数。 ## Solution 先考虑一个简单的问题:从 $1\sim n$ 的数字取出若干个数字 ......
Ignatius Princess 1028 HDU III

airflow standalone problem fix: The webserver is already running under PID 3244

## problems with airflow standalone to start server with error: `The webserver is already running under PID 3244`. Try to list full server listening i ......
standalone webserver airflow problem already

Resource [logback.xml] occurs multiple times on the classpath.

15:16:57,390 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback.groovy] 15:16:57,390 |-INFO in ch.qos.logback. ......
classpath Resource multiple logback occurs

MySQL 8错误日志出现"The table /home/work/mysql_3306/tmp/#sqla2b_298b06_4d is fu11!"

############## 了解MySQL 8.0.26的错误日志出现"The table /home/work/mysql_3306/tmp/#sqla2b_298b06_4d is fu11!"的bug,暂时通过修改临时表的存储引擎为内存引擎解决 MySQL8.0.13 开始引入新的临时内存表 ......
quot 错误 sqla2b MySQL mysql

echarts更新数据后报错 There is a chart instance already initialized on the dom

产生原因 使用Echarts插件的时候,多次加载会出现There is a chart instance already initialized on the dom.的警告,表示DOM上已经初始化了一个图表实例。 解决方案 定义一个全局变量,在初始化之前先判断该实例是否存在,若存在,先销毁。 va ......
initialized instance echarts already 数据

connect(descriptor:addr:size:): Operation not permitted (errno: 1)

macOS开发mysql client的时候,默认开启了沙箱机制。结果每次连接都给报这个错 如果没有捕获好的话,可能只会出现 connect(descriptor:addr:size:): 这个错误 找半天才在网上找到有这个说法的 另外一个是如果要通过调用 ssh启动通道来做跳板访问的话,或者需要访 ......
descriptor Operation permitted connect errno

D. The BOSS Can Count Pairs

D. The BOSS Can Count Pairs You are given two arrays $a$ and $b$, both of length $n$. Your task is to count the number of pairs of integers $(i,j)$ su ......
Count Pairs BOSS The Can

Can't operate. Failed to connect to bus: Host is down

» sudo systemctl daemon-reload System has not been booted with systemd as init system (PID 1). Can't operate. Failed to connect to bus: Host is down 尝 ......
operate connect Failed Host down

IDEA中slf4j和logback冲突,快速排除(LoggerFactory is not a Logback LoggerContext but Logback is on the classpath)

pom文件中右击 ctrl+f 输入点击定位 选中shift+delet,直接排除 或者手动输入排除 ......