chests 1519f keys and
[931] arcpy - buffer, delete shp and rename shp
The script is as follows: arcpy.analysis.Buffer("siteboundary.shp","siteboundary1.shp","-5 Centimeters","FULL","ROUND","NONE",None,"GEODESIC") arcpy.m ......
[930] arcpy - change spatial reference, zoom to layer and export to PDF
The general idea is as follows: aprx -> layout -> map -> layer -> extent layout -> setExtent layout -> exportToPDF The script is as follows: def expor ......
Roma and Changing Signs
传送门 记\(t\)为\(a\)中\(a_i<0\)的数的个数。 若\(k \le t\),则从小到大将负数变成正数最优。 假设不这么操作最优,也就是选了一个较大的负数或者正数取反,将它们换成一个小的负数取反,答案不劣。 若\(k \ge t\)且\(k-t\)为偶数。 所有数的和为\(s_1\), ......
CF1874F Jellyfish and OEIS 题解
题目链接 不明白出题人的脑回路是不是被宇宙射线改变过 /jy。 题目给出了若干个区间,要我们计算满足每个区间都不是对应下标的排列的数量,正着计算不满足要求的数量是困难的,我们将其容斥,转化为钦定一些区间要求其必须满足它是对应下标的排列,在下文中,我们称这样的区间为一个约束。 我们设约束的集合为 \( ......
Maximum AND
看到这么多位运算,拆位考虑。 对于\(f(a,b)\)的一位,要么是0,要么是1。 该位是1,说明有某种\(b\)的排列,使得该位上\(a_i \oplus b_i\)均为1。(因为\(\&\)的结果是1,说明全都是1)。 那么我们要优先满足哪一位为1呢? 一个直接的想法是优先满足高位为1,因为\( ......
[929] datetime format (strftime() and strptime() Format Codes)
ref: strftime() and strptime() Format Codes The following is a list of all the format codes that the 1989 C standard requires, and these work on all p ......
[LeetCode] 2574. Left and Right Sum Differences
Given a 0-indexed integer array nums, find a 0-indexed integer array answer where: answer.length == nums.length. answer[i] = |leftSum[i] - rightSum[i] ......
C. Tenzing and Balls
题目大意: 给定一个序列,你可以拿走任何两个相等元素中间的所有元素,问最多可以拿走多少元素 思路: dp: 第一次优化: 对于每个元素作为最后一个元素,考虑在它前面和它相等的元素选一个消去中间元素加上前面一个元素的dp值, $dp[i]=max(dp[j-1]+i-j+1,dp[i-1]),a[i] ......
Please take a look at the provided example service unit files in this directory, and adapt and install them. Sorry!
安装Redis,执行 install_server.s 脚本时,出现如下报错: 解决方案,注释掉 install_server.sh 中的部分代码,注释代码详情如下: 再次执行 install_server.sh 脚本,结果如下: ......
【CVPR2023】Efficient and Explicit Modelling of Image Hierarchies for Image Restoration
> 论文:https://readpaper.com/paper/4728855966703960065 代码:https://github.com/ofsoundof/GRL-Image-Restoration 这个论文的代码地址叫GRL,意思是 Global, Regional, Local 的 ......
Jenkins问题记录:Git SSH方式访问,报错:Host key verification failed. (Windows)
问题:在本地windows机器上安装了jenkins,并且设置好Git SSH凭据,在git bash命令行窗口可以使用git pull命令,但是在jenkins 中执行git pull就会报错。 报错信息: Host key verification failed. fatal: Could no ......
[Compose] Concurrency + Channel and Reactive programming for JS
Concurrency + Channel (CSP): Concurrency is a way to run operation in isolated thread, a way to better utilize the CPU resources and handle multi simu ......
浅析Redis大Key
在京东到家购物车系统中,用户基于门店能够对商品进行加车操作。用户与门店商品使用Redis的Hash类型存储,如下代码块所示。不知细心的你有没有发现,如果单门店加车商品过多,或者门店过多时,此Key就会越来越大,从而影响线上业务。 ......
element cannot be mapped to a null key的解决方法
目录报错:分析解决方案 报错: 日志 ERROR [o.a.c.c.C.[.[.[/sa].[dispatcherServlet]] - Servlet.service() for servlet [dispatcherServlet] in context with path [/sa] thre ......
[Vue]React、Vue中的key有什么作用? (key的内部原理)
1. 虚拟DOM中key的作用: key是虚拟DOM对象的标识,当状态中的数据发生变化时,Vue会根据[新数据]生成[新的虚拟DOM] 随后Vue进行[新虚拟DOM]与[旧虚拟DOM]的差异比较,比较规则如下: 2. 对比规则: (1).旧虚拟DOM中找到了与新虚拟DOM相同的key: ①.若虚拟D ......
mysql create table and insert into via c++ and lmysqlcppconn
//create table t1 CREATE TABLE `t1` (`id` bigint NOT NULL AUTO_INCREMENT,`author` varchar(40) NOT NULL,`comment` varchar(40) NOT NULL,`content` varcha ......
【找到 Anchor-based and Anchor-free 性能差距的本质】Adaptive Training Sample Selection (ATSS) 论文精读
原始题目:Bridging the Gap Between Anchor-based and Anchor-free Detection via Adaptive Training Sample Selection 中文翻译:通过 自适应训练样本选择 缩小 Anchor-based and Anch ......
[CF551E] GukiZ and GukiZiana
CF551E 卧槽,lzh最爱的分块!卧槽,lzh最爱的分块!卧槽,lzh最爱的分块!卧槽,lzh最爱的分块! 维护懒标,散块重构。 unordered_map<long long,int> 会 TLE unordered_map<long long,bool> 会 AC #include<cstd ......
Docker_报错:Host key for 47.116.79.175 has changed and you have requested strict checking. Host key verification failed.
Host key for 47.116.79.175 has changed and you have requested strict checking. Host key verification failed. 问题原因用OpenSSH的人都知ssh会把你每个你访问过计算机的公钥(public ......
com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Public Key Retrieval is not?
问题 :连接MySQL数据库时抛出异常信息: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Public Key Retrieval is not allowed一开始aplication.yml配置如下所 ......
redis 替换keys方案 scan
redis 替换keys方案 @Autowiredprivate RedisTemplate redisTemplate; public Set<String> keyScan(String key) { //批量查询需要统计的数据 Set<String> keys = (Set<String>) ......
Soil and Water Loss in Southern Jiangxi
Ganzhou, a typical red soil hilly area in Jiangxi province, is a pilot area for high-quality development of soil and water conservation in China. Thro ......
Python中的JSON数据解析和映射--根据value查询key
import json # 原始 JSON 数据 json_data = ''' [ {"id": 1, "name": "MOVE"}, {"id": 2, "name": "LEFT_DOWN"}, {"id": 3, "name": "LEFT_UP"}, {"id": 4, "name": ......
Could not load host key: /etc/ssh/ssh_host_rsaxxx
/usr/sbin/sshd 错误提示: Could not load host key: /etc/ssh/ssh_host_rsa_key Could not load host key: /etc/ssh/ssh_host_ecdsa_key Could not load host key: ......
ADASTRNG - Ada and Substring 题解
ADASTRNG - Ada and Substring 题解 题目描述 给定一个小写字符串。 输出 \(26\) 个数,代表以 \(\texttt{a}\sim \texttt{z}\) 开头的本质不同的子串个数。 题目分析 高度数组模板题。 可以想到将以每个字符开头的本质不同的子串数目转化为: ......
CF1592F Alice and Recoloring
CF1592F1 Alice and Recoloring 1 CF1592F2 Alice and Recoloring 2 Part1 很容易发现,其实二和三操作是没有用的. 对于二操作,可以用一操作进行类似于求二维前缀和的方式实现,需要进行一操作至多 \(2\) 次,花费为 \(1+1=2\) ......
Water Pollution: The defination, types, causes, effects and meatures.
What is water pollution? Water pollution can be defined in many ways. Usually, it means one or more substances have built up in water to such an exten ......
BWT and FM-index
目录概Burrows-Wheler Transform (BWT)编码性质解码FM-index直观但简陋的方式更高效的方式代码 Langmead B. Burrows-Wheeler transform and FM Index. burning-BWT算法浅析-(一) 概 有趣的编解码. Burr ......
3 ways light pollution harms the planet - and what we can do about it
Light pollution not only impacts the environment, but our health too. ·Global light pollution has increased by 49% over 25 years to 2017, new research ......