The Alevov number in the set theory

... In the set theory, 阿列夫数 , also known as 艾礼富数 , is a series of super-poor bases. Its notation is א (evolved from the Hebrew alphabet aleph) and is indicated by a horn. The 可数集 (including natural numbers) has the potential tag {\displaystyle \aleph _{0}} , the next big potential is {...


2018.09.23 bzoj3143: [Hnoi2013] Swim (dp + Gaussian elimination)

... 传门 Obviously, you only need to ask for the expected number of times that all sides are passed, and then greedily set the number of the side with a small side to the number of the city. So how do you find the expected number of times that all sides are passed? Obviously this is only...


Reading Notes - Deep Learning

... 读笔记-Deep Learning Why would you like to read this book? I have gained a lot from the book "Deep Work Power" by Cal Newport. I found some ways to improve my concentration and work efficiency. I recently bought another book, "Excellent to Cannot Be Ignored" (Simplified Chinese), and I...


Scrapy0.24 document interpretation of the spider file

... this time will revisit the spider file Scrapy spider workflow: 1 Initialize the Request with the initial URL and set the callback function. Response, and passed as a parameter to the callback function. The initial request is obtained by calling start_requests() . Read the URL in start...


Clannad's largest family (clannad)

... 团子大家族(clannad) 题描述 bx2k has many colorful sprouts. Each group has a color. He decided to put m squads in a row. For aesthetic reasons, he requires that any two adjacent scorpions cannot have the same color. Because bx2k is lazy, he came to seek your help. Input The input file contains...


Caioj 1172: [Video] Monotonic Queue (Transitional Question)

... 1172: [Video] Monotonic Queue (Transitional Question) Title [题意] Given a sequence of n numbers, the maximum number of segments in each column of length m is output from left to right. For example, a sequence of 8 numbers [1 3 -1 -3 5 3 6 7], m=3, then each of the three consecutive...


Talking about http in Cache-Control

... Foreword When we use http access, we will send a request first, then the server will return a response, in Chrome's debugger (press F12 or right click to select check) Shows the whole process: The first part of General is a summary, including the request address, request method, status...


Nginx tutorial tenth: application examples & stepped on the pit

... 一, application example 1, cluster configuration upstream mytomcat{ #分权, the ratio of accessing 8081 and 8082 is 1 to 1. Server localhost:8081 weight=1; Server localhost:8082 weight=1; } Server { Listen 80; Server_name test.goku.com; Location / { #Use mytomcat allocation rules, that is,...


CentOS 7 started from the beginning of PHP

... Someone said, I rely on, scare you, isn’t it from scratch, yeah, it’s from scratch, there’s another one in front. Because, our goal is to achieve the realization of lnmp ah a total of two major steps, open. We started to install libxml2, basically the code cd /source/ Wget http://cn2...


Dubbo-php-framework client api parsing (3)

... This we analyze the processing flow after generating Proxy, then the previous article, we can see that there are p2p and register mode, the two modes are the largest The difference is where the service address information is obtained, and the proxy processing flow is always. public...