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CF1083F The Fair Nut and Amusing Xor
#### 简要题意： 给你两个序列 $a,b$，一次操作可以将 $a$ 的某一个长度为 $k$ 的子区间全部异或上任意值，$f(a,b)$ 为使得 $a$ 和 $b$ 相同的最少的操作数量。 支持单点修改 $a,b$，并在开头和每次修改后输出 $f(a,b)$ 的值。 $n,k,q\le 2\tim ......
CF1361E James and the Chase
#### Description 给定一个有 $n$ 个点 $m$ 条边的**有向强连通图**。称一个点是**好的**当且仅当它到其他点都有且只有一条**简单路径**。如果好的点至少有 $20\%$ 则输出所有好的点，否则输出 `-1`。 $\sum n\leq 10^5,\sum m\leq 2\ ......
CF1152F2 Neko Rules the Catniverse (Large Version) 题解
发现挨位考虑填哪个不太现实，考虑值域。 令 $dp_{i,j,st}$ 表示考虑到 $i$，此时序列长度为 $j$，$i-m$ 到 $i-1$ 填空状态为 $st$ 的方案数，考虑选/不选数即可： $dp_{i,j,st}\times (\text{popcount}(st)+1)\to dp_{i ......
arcgis注册postgresql失败。postgres be sure the databse client software is installed and configured correct
解决： 将PostgreSQL\9.1\bin目录下的Libpq.dll,Libeay32.dll, Libintl-8.dll, Ssleay32.dll复制一份放在ArcGIS Server安装目录的Server\bin***意：这里拷贝的文件需要都是64位的。 重启arcgis server服 ......
NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running.
###问题提示： ` NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and runn ......
【863】Calculate records based on the same value
Suppose we have a dataframe, it has a column of "country". It lists different names of country's names, and for one country maybe it has multiple reco ......
Linux系统Apache报错httpd: Could not reliably determine the server's fully qualified domain name, using localhost.localdomain. Set the 'ServerName' directive globally to suppress this message
解决办法： 在配置文件中加一句ServerName localhost:端口号 # echo "ServerName localhost:8068" >> /etc/httpd/conf/httpd.conf 重启Apache即可解决。 ......
HTTP/2 stream 1 was not closed cleanly before end of the underlying stream解决
通过git clone 文件时报错 HTTP/2 stream 1 was not closed cleanly before end of the underlying stream 解决： git config --global http.versioin HTTP/1.1 重新git clon ......
升级EF7连接SQL server出错SqlException: A connection was successfully established with the server, but then an error occurred during the login process. (provider: SSL Provider, error: 0 - 证书链是由不受信任的颁发机构颁发的。)
今天把项目里的Microsoft.EntityFrameworkCore.SqlServer和Microsoft.EntityFrameworkCore.Tools从6.0.6升级到了最新的7.0.9。一运行程序出错了。 ![img](https://img2023.cnblogs.com/blog ......
Linux系统Apache添加监听端口后无法启动服务并报错：Job for httpd.service failed because the control process exited with error code. See "systemctl status httpd.service" and "journalctl -xeu httpd.service" for details.
导言：这是SE Linux安全机制导致的。 解决方法： 1.查看当前httpd端口 # semanage port -l|grep http 2.将对应端口加入SE Linux，以8068为例 # semanage port -a -t http_port_t -p tcp 8068 3.再次查看 ......
[LeetCode] 2461. Maximum Sum of Distinct Subarrays With Length K
You are given an integer array nums and an integer k. Find the maximum subarray sum of all the subarrays of nums that meet the following conditions: T ......
LOADING Redis is loading the dataset in memory
MISCONF Redis is configured to save RDB snapshots, but is currently not able to persist on disk. Commands that may modify the data set are disabled. P ......
[LeetCode] 2597. The Number of Beautiful Subsets
You are given an array nums of positive integers and a positive integer k. A subset of nums is beautiful if it does not contain two integers with an a ......
invalidate the cache in Spark by running 'REFRESH TABLE tableName' command in SQL or by recreating the Dataset/DataFrame involved
``` ... 1 more Caused by: java.io.FileNotFoundException: File does not exist: hdfs://ns1/user/hive/warehouse/dw.db/dw_uniswapv3_position_detail/pk_day ......
The file extension is not supported by Shapefile data provider.
后端返回：文件上传失败：The file extension is not supported by Shapefile data provider. 表明此时上传/处理的文件不符合标准。 ......
These are the list of external providers available to the application.
These are the list of external providers available to the application. https://github.com/davidfowl/TodoApi/blob/c209f6ae5c5f31f4808b0df85f358d4a572ea ......
解决 Https 站点请求 Http 接口服务后报 the content must be served over HTTPS 错误的问题
之前将自己所有的 `Http` 站点全部更新为 `Https` 站点，但是在请求后台接口服务的时候还是 `Http` 请求，导致部署之后，直接在控制台报 `This request has been blocked; the content must be served over HTTPS;` 的... ......
题解 CF840C On the Bench
这是一篇简洁易懂的良心题解，提供了多种做法。 对于两个数 $x,y$，定义 $x=n^2 \cdot tx,y=m^2 \cdot ty$。如果 $x\cdot y$ 为平方数，则说明 $tx=ty$。所以我们可以将每个数除去其平方因子，比较相邻两数是否相等即可。 ## F1： 定义 $f_{i,j ......
题解 The Human Equation
[The Human Equation](https://www.luogu.com.cn/problem/CF1775E) 思维题。 我们考虑每次 $a$ 数组加一减一对于其前缀和 $sum$ 的影响。 可以发现，假设相邻两次加一和减一的位置分别为 $l$ 和 $r$，那么 $sum$ 在 $[l ......
[Javascript] How to fix iphone safari auto zoom in problem without `maximum-scale=1.0`
Solution 1: consider change font-size to 16px or above Soution 2: using javascript if(navigator.userAgent.indexOf('iPhone') > -1 ) { document .querySe ......
python包报错ImportError: urllib3 v2.0 only supports OpenSSL 1.1.1+, currently the 'ssl' module is compiled with 'OpenSSL 1.0.2k-fips 26 Jan 2017'
报错：ImportError: urllib3 v2.0 only supports OpenSSL 1.1.1+, currently the ‘ssl’ module is compiled with OpenSSL 1.1.0h 27 Mar 2018. 解决办法：Terminal窗口执行：p ......
You don't have write permissions for the /System/Library/Frameworks/Ruby.framework/Versions/x.x/usr/lib/ruby/gems/x.x.x directory.
Gem Error ERROR: While executing gem ... (Gem::FilePermissionError) You don't have write permissions for the /System/Library/Frameworks/Ruby.framework ......
解决报错Cannot connect to the Maven process. Try again later. If the problem persists, check the Maven
## 故障描述： 使用idea下载java某个源文件，idea报错：Cannot connect to the Maven process. Try again later. If the problem persists, check the Maven 
报错详细信息如下 “/”应用程序中的服务器错误。 分析器错误 说明: 在分析向此请求提供服务所需资源时出错。请检查下列特定分析错误详细信息并适当地修改源文件。分析器错误消息: 未能创建类型“WebApp.FileUploadHandler”。源错误: 行 1: <%@ WebHandler Lang ......
服务器/虚拟机 关机或重启之后报：Entering emergency mode. Exit the shell to continue.
## 具体现象  多次重启之后还是不行，提示让进入紧急模式或退出 ## 排查原因 根据提示输入journalctl ......
【图论】CF1508C Complete the MST
[Problem Link](https://codeforces.com/contest/1508/problem/C) 有一张 $n$ 个点的完全图，其中 $m$ 条边已经标有边权。你需要给剩下的边都标上权值，使得所有边权的异或和为 $0$，并且整张图的最小生成树边权和最小。 $n,m\le 1 ......
CF1175F The Number of Subpermutations 对自己的警告--zhengjun
太久没见过启发式合并了，然后没想出做法。 首先笛卡尔树建出来。 然后直接枚举跨过 $mid$ 的长度为 $a_{mid}$ 的区间，RMQ $O(1)$ 验证即可。 发现这样的区间个数不超过左右区间大小的较小值，时间复杂度：$O(n\log n)$。 ### 代码 ```cpp #include u ......
excel 导出 The maximum length of cell contents (text) is 32767 characters
**导出excel功能，报错。错误日志提示：:The maximum length of cell contents (text) is 32767 characters** ![](https://img2023.cnblogs.com/blog/2197916/202307/2197916-20 ......
PAT-甲级-1007 Maximum Subsequence Sum C++
Given a sequence of K integers { N1, N2, ..., NK }. A continuous subsequence is defined to be { Ni, Ni+1, ..., Nj } where 1≤i≤j≤K. The Maximum S ......
[LeetCode] 2542. Maximum Subsequence Score
You are given two 0-indexed integer arrays nums1 and nums2 of equal length n and a positive integer k. You must choose a subsequence of indices from n ......