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codeforces.com
In short: Getting listed on Codeforces is free. Plan for about 10 minutes — it is a form plus links and assets you already have.
What they ask for: Register and fill your profile; you can also write technical blog entries.
Register and fill your profile; you can also write technical blog entries.
Off-topic promotional blog posts are downvoted or deleted.
Open the submission page on codeforces.com and complete its form — that is the "Open submit page" link at the top of this page.
Off-topic promotional blog posts are downvoted or deleted.
Priority sets the band — this one is later. Cost (free) and effort (quick) move it within that band, which puts it in the long tail tier. The score orders a submission queue. It is not a measure of the site’s domain authority, traffic or quality.