I'm sorry. I should have clarified and I can't edit my original comment now. I meant plagiarized problem statements. Usually these sites have the entire problem statements from our website along with the solution (aka code snippets to solve.)
Most, if not all, of the problem statements won't even qualify for copywrite, they are generic problems that people have been stating for decades or more and as such are extreamly unlikly to be unique or original to hackerrank.
I am sure however you have already assesed this and applied for the appropriate registration for these works that you are claiming to own the copywrite to? right?
