I'm afraid that your article needs to fall in one of those categories to be considered for the writeathon Abhishek Kumar...
It's like hackathons, where you need to solve a specific project or build a project based on a specific service, you cannot build your own thing if there are specific rules...
Nevertheless, I'd like to encourage you to properly take part in this hackathon, the first deadline is on Monday, 22nd of August.
Thank you and let me know if there is anything else I can do to help :)