Programmer Think

Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in-place. Example 1: Input: [ [1,1,1], [1,0,1], [1,1,1] ] Output: [ [1,0,1], [0,0,0], [1,0,1] ] Example 2: Input: [ [0,1,2,0], [3,4,5,2], [1,3,1,5] ] Output: [ [0,0,0,0], [0,4,5,0], [0,3,1,0] ]     ...

This article mainly refers to the Rest Framework official website documents: https://www.django-rest-framework.org/  And then I realize my own personal summary. Development tools: Pycharm, python 3.7, Django 2.1, djangorest framework-3.9.4 Contents of this article New project: Serializer: View: urls.py: Configur ...

Experimental content 1. Write a program graph.cpp, design the adjacency matrix with weight graph and adjacency table creation and output operation, and on this basis, design a main program exp8-1.cpp to complete the following functions. (1) establish the adjacency matrix of digraph G as shown ...

Problem solving Report cf A Remove all existing ones, and take the maximum value + 1 for the rest #include <bits/stdc++.h> #define int long long using namespace std; signed main() { int T; cin>>T; while(T--) { int n,s,t; cin>>n>>s>>t; int k=s+t-n; s-=k,t-=k; int a ...

Preface We often use cache to improve data query speed. Due to the limited cache capacity, when the cache capacity reaches the upper limit, we need to delete some data and move out of space, so that new data can be added. Cache data cannot be deleted randomly. Generally, we need to delete cache data according to some algorithm. The commonly use ...

First appeared in the WeChat public's front-end growth notes, written in 2019.10.28 background This paper records the whole thinking process in the process of writing questions for reference. The main contents include: Assumption of topic analysis Write code validation Consult others' solution Thinking and summing up Catalog 1. Sum of two nu ...

When we write large projects such as React and Vue, or use the framework to build small programs, in order to facilitate the collaborative development of multiple people, we often introduce ESlint to standardize the code writing, so that different developers can write unified code. For native applet pro ...

Python&MySQL Catalog Python&MySQL Introduction 1.1 database classification Two MySQL 2.1 grammar Overview of 2.1.1 2.1.2 add data 2.1.3 delete data 2.1.4 change data 2.2 MySQL DB module 2.2.1 connecting to the database 2.2.2 close database 2.2.3 query data 2.2.4 add data Three ORM 3. ...

1. [microcloud provider Dept Hystrix-8001] modify pom.xml configuration file, and add Hystrix configuration class: <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-hystrix</artifactId> </depend ...

Original link: http://www.cnblogs.com/riasky/p/3509073.html In spring MVC, Date, double and other types are defined in the bean. Without any processing, Date and double cannot be bound. The solution is to use the @ InitBinder tag provi ...