How do I start? (continuously updating)

How to brush questions

The latest topic here is 2020.9.5 Date expired , But all the questions can be done , And can submit and judge the questions , So don't worry about expiration
I have a bold idea , In order to facilitate myself and the latecomers, I will give each set of exercise questions a set of questions , And all the answers are typed manually by myself . If I can't do it, I'll treat it as if I didn't say that

Title source ——POJ && HDU

Search questions （BFS&&DFS）

Because this set of exercises was done very early , There are only a few questions left , Then attach the explanation of the boss first , If you have time, you can fill in your own solutions

Explanation of big man ： The big guy's question

Search for topics （ Advanced ）

Graph theory exercise 1

Graph theory exercise 2—— And look up sets and minimum spanning tree exercises

Graph theory exercise 3—— shortest path

Graph theory exercise 3【 Answer key 】

password ：HNUCM_ACM

The following is a link to the web version

Each topic has an after-school solution

Sorting out the topics of Niuke series （ Classification by knowledge points ）

Introduction to Niuke algorithm competition

Luogu questionnaire square

You have to quietly pick the top , And then it's amazing