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I. application scenario of timing start For example, in the stand-alone environment, we need to use Kafka for data persistence. Since the active time of users is from 10 a.m. to 12 p.m., a large amount of data persistence in this time period may affect the performance of the database and lead to the decrease of user experience. We can choo ...

Links: https://ac.nowcoder.com/acm/contest/949/HSource: niuke.com Title Description There are n shells in Xiaoyang's hands, each of which has a color, and the color of the first shell is colicoli coli. Now Xiaoyang has three operations: 1 l r x: add xx to the color value of all shells in the [l,r][l,r] range. 2 l r: ask the maximum va ...

Function recursion That is, the function calls itself directly or indirectly in the call stage. supplement # View the upper recursion limit supported by the function import sys print(sys.getrecursionlimit()) # Not very accurate # Generally, 1000 is returned. sys.setrecursionlimit(2000) # If you want to change the upper limit of r ...

11.4 printing of containers Some basic types of containers //: Holding/PrintingContainers.java // Containers print themselves automatically. import java.util.*; public class PrintContainers { static Collection fill(Collection<String> collection) { collection.add("rat"); collection.add("cat"); collection.add(" ...

Meaning: given m pattern strings, you are required to construct a main string with a length of n (n < = 2000000000). The main string does not contain pattern strings. Ask how many such main strings are. Train of thought: because it does not include pattern string, it is also ac automata obviously. Because n is very big, it's not good to use ...

The magic way of thinking, or to learn one. Question meaning: give you a string and define lcs with two prefixes and lcp with two suffixes. Find the value of the formula sub membrane \ (2 ^ {64} \).\[ \sum_{1\le i<j\le n} lcp(i,j)lcs(i,j)[lcp(i,j)\le k1][lcs(i,j)\le k2] \] Analysis: For a pair of \ (< I, J > \), let's put their lcs a ...

I haven't been blogging for a long time. Because it's so konjaku. What can I do with this konjaku Today, I finally met a template problem (before that, but it's too konjak) But... Write code for 5 minutes, debug for 2 hours. Dividing line: returning to the main topic This is the common Hungarian algorithm. Almost. How to do this problem? 1: L ...

Basic data type supplement str: title case name = 'alKx' name1 = name.capitalize() # title case print(name1) Capitalize initial name = 'alex haha' name1 = name.title() # Capitalize initial print(name1) Case reversal print(name.swapcase()) # Case reversal Center, center fill print(name.center(20, "*")) # Center, center fill S ...

To use Swoole in ThinkPHP, you need to install the think Swoole composer package, provided that the system has installed the Swoole PECL extension. To install think swoole, execute the composer command in the project root directory of tp5: composer require topthink/think-swoole If you don't say much, go straight to the code: To create a WebSock ...

The author's original Qftm release: https://xz.aliyun.com/t/6576 Misc Sign in problem RoarCTF {check in!!! } Six years of gold There is a section of base64 at the end of the file, which can be seen as a compressed package when decoded to hexadecimal. Password required to open compressed pack ...