I found a cheating case in ACM ICPC Kanpur online round. Please look at these two solutions “http://www.codechef.com/viewsolution/2849655” and “http://www.codechef.com/viewsolution/2849540” for the statues problem. These are exactly same but from different teams (not surprisingly from the same institute). There may be other cases as well. I request admin to look into this and take very strict action.
Dude of course codechef is not going to let plagiarized submissions pass through. You wasting your time going through everyone’s submissions to find these cases is not making a difference. This is codechef discuss, use it for something productive.