Recently a user called @rohit_jere_rj has been active in this forum. He has posted some well-written and well-informed answers to various questions. Naturally many members, myself included, have upvoted his posts and accepted his answers.
Yesterday he answered another question (link) with an answer which seemed a bit off. The question asked for an implementation to a particular problem, but @rohit_jere_rj instead wrote another well-written description of the idea behind the problem. This was a bit odd, because if he knew how to solve it he could easily write a snippet and answer with that instead. So I Googled his answer, and voila, it was copied directly from a Quora post (link). Digging further, I realized that ALL of his well written answers were indeed ripped off Quora. When I pointed this out to him in the comments, he promptly deleted his answer.
His answer to What are things I should know before my 1st Contest? and How to get started on Codechef? is taken from here.
His answer to Which Programming language should I learn first? is taken from here.
His answer to How to prepare to win any coding contest? is taken from here.
I could go on, but I think I have made my point. Not once does @rohit_jere_rj cite his sources or give credit to the Quora answers in any way. As a sidenote, the users @newone123 and @johndavis1967 who have asked questions to which @rohit_jere_rj has answered both appear to be suspicious accounts.
But wait, @rohit_jere_rj must be a good coder, he has fully solved 662 practice problems, which is quite impressive. You may have guessed it already, he copied existing visible solutions and submitted them to get AC. Filter by language and check a few submissions below his, and you are bound to find the exact code he submitted. This also led to a ridiculous density of submissions. For example, from 08:45 PM to 08:47 PM on 26/09/16 he had solved 14 different problems! Interestingly, he was unable to solve a single problem in the April Cook-off.
So there we have it… an elaborate scheme to get karma, laddus and goodies from Codechef with minimum effort on one’s part. I would have mailed this to Codechef but then I decided that the other users needed to be aware of such activity, so I made this post.
Personally I feel that the reward system is very difficult to enforce fairly so it ought to be scrapped, but that is a different issue entirely.
@admin please take necessary steps against this user.
Follow up link (post by admin): https://discuss.codechef.com/questions/97372/clarification-on-karma-farming
@rohit_jere_rj and other users suspected of karma farming were suspended.