Programmer Think

meaning of the title Title Link Sol The most intuitive idea is to find the longest way after deleting each point. Let's consider how to find this thing Set \ (f[i] \) to represent the longest path length ending with \ (I \), and \ (g[i] \) to represent the longest path length starting with \ (I \) According to the nature of DAG, it is obvious t ...

I. new project       II. Create a new source file main.cpp and mining,cpp           III. create a new header file mining.h       IV. add picture resources           After adding, a. h header file will be generated in the header file to call resources After opening, you can see that each resource file is define ...

1.1 smallint description 1.2 smallint practice 1.2.1 environmental preparation 1.2.2 plus UNSIGNED parameter 1.2.3 plus ZEROFILL parameter 1.2.4 without UNSIGNED and ZEROFILL parameters 1.3 summary of smallint 1.1 smallint description type length Length is when length is not specified Occupying byte Signed Unsigned smallint 5 6 (actual l ...

subject Given a linked list, delete the nth last node of the list and return the head node of the list. Example: Given a list: 1 - > 2 - > 3 - > 4 - > 5, and n = 2 When the penultimate node is deleted, the list changes to 1 - > 2 - > 3 - > 5 Explain: The given n guarantee is valid. Advance: Can you try a ...

Spring Introduction: spring framework is a Java platform, which provides comprehensive infrastructure support for Java application development. Spring is responsible for infrastructure, so you can focus on application development.Spring allows you to build applications from "plain old Java objects" (POJO) and implement enterprise app ...

Today, it is found that when using Ajax requests, if the background redirection to other pages is not successful, only in the browser address bar input can achieve redirection. Ajax does not support redirection by default. It is a partial refresh and does not reload the page. The function to be implemented is that the background gateway inter ...

Original blog address, this blog was first published in csdn, original Some time ago, I met the need of website skin changing. I thought it would be very simple. Just use Sass or Less to set variables. The result is the style set in js It has to be set up separately. It's troublesome. This article code gitHub address https://github.com/l-x-f/va ...

1. Navigation Switching Encapsulate a common component, Tabbar, to include components in pages that require navigation pages.The code is as follows: <template> <div class="tabbar"> <!-- Place holder --> <div class="placegolder-container"></div> <!-- Bottom navigation bar --> <div class="bottom-tabs"& ...

> Github original link 1 OOP Klass (ordinary object pointer) model OOP Klass model is used to describe the properties and behaviors of class It is designed as OOP and Klass because we don't want each object to have a C ++ vtbl pointer. Therefore, ordinary oops has no virtual function Instead, they forward all "virtual" functions t ...

Druid supports SQL [ EXPLAIN PLAN FOR ] [ WITH tableName [ ( column1, column2, ... ) ] AS ( query ) ] SELECT [ ALL | DISTINCT ] { * | exprs } FROM table [ WHERE expr ] [ GROUP BY exprs ] [ HAVING expr ] [ ORDER BY expr [ ASC | DESC ], expr [ ASC | DESC ], ... ] [ LIMIT limit ] [ UNION ALL <another query> ] Duration data type The duration ...