Luogu is a famous OJ (Online Judge) in China. Many users of Codeforces may know it, but don't know how to participate contests on Luogu. So I'm writing this blog to offer a brief tutorial.
I suppose that you do not have a Luogu account, so let's start from registering.
Step 1. Create An Account
Enter the site: link
Here is the English translation for this page.