Recently someone asked for a tutorial about using polygon to prepare problems, I couldn't find such tutorial so I decided to write one. You can find the tutorial here.
This tutorial is beginner friendly, I tried to explain every step in details and through the tutorial I have created a complete simple problem. I hope you will find this tutorial interesting and helpful. If you want READ access for the problem created in this tutorial you can write a comment with your polygon handle on this blog or simply send me a message.
You can also check some of my previously written articles about Competitive Programming at: