majority 134c arc the
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. ......
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 ......
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=" ......
[ARC085F] NRE
# [[ARC085F] NRE](https://www.luogu.com.cn/problem/AT_arc085_d) 首先这道题要先将区间**按左端点排序**。我们先不考虑区间重叠的情况。 令 $f_i$ 表示前 $i$ 个区间已经决策好是否选择,而且**第 $i$ 个区间必选**的情况下 ......
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 ......
「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 ......
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。 ......
[ARC118E] Avoid Permutations
## 题意 给定一个长度为 $n$ 的排列 $p$,在一个 $(n + 2)\times(n + 2)$ 的网格上,禁止通过 $(i, p_i)$ 这些点,每次只能向上或右走一格,从 $(0, 0)$ 走到 $(n + 1, n + 1)$ 的方案数,定义为排列的权值。给定一个不完整的排列,对于所有 ......
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 ......
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 ......
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
......
[ARC161F] Everywhere is Sparser than Whole (Judge)
Problem StatementWe define the density of a non-empty simple undirected graph as $\displaystyle\frac{(\text{number of edges})}{(\text{number of vertic ......
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, ......
曲线艺术编程 coding curves 第三章 弧,圆,椭圆(ARCS, CIRCLES, ELLIPSES)
# 第三章 弧,圆,椭圆(TRIG CURVES) > 原作:Keith Peters https://www.bit-101.com/blog/2022/11/coding-curves/ > 译者:池中物王二狗(sheldon) > blog: http://cnblogs.com/willia ......
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 ......
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 ......
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 ......
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 ......
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 ......
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 ......
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. ......
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 ......
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 ......
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 ......
Arc get_mut
/// Returns a mutable reference into the given `Arc`, if there are /// no other `Arc` or [`Weak`] pointers to the same allocation. /// /// Returns [`N ......
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 ......
「解题报告」CF1152F2 Neko Rules the Catniverse (Large Version)
发现有互不相等的限制,那就考虑一下连续段 DP。每次从小到大考虑每个数是否填,填的话填到哪里即可。 容易发现题目中的限制相当于要求每一个连续段的右边填的数不能与它差出 $m$,且容易发现每个段的差的要求一定不相等,那么我们可以直接 $2^m$ 状压记录每个连续段的差值要求。然后再记录一下是否已经确定 ......