@logic_max and the others, be more understanding. The problems are written by people, people make mistakes. I’m sure the setters will be a lot more careful from here on but don’t criticize so much. Codechef is a great platform and a lot of users grew a lot here thanks to the problems and the dedication the setters and testers put behind it. There’s no reason for you to be “disappointed”. I’m sure it must be frustrating for you to see those kind of solutions pass. Email to email@example.com, they are really quick answering the queries even though I believe this situation is already being discussed.
I guess the main problem here is the time it took for the problem to be noticed. If they change the status of the solutions, the users that didn’t pass the corner cases will get mad because they didn’t have time to try another approach, if they don’t change a lot of people will get mad because users with the wrong approach scored with this problem. They can’t just do something without pondering about it. I’m ashamed to say that my solution also fails the corner cases but I personally can deal with a lower score, I’m not going to be happy about it but what can I do, should’ve had more attention, but what about the others? People who solved the problems days ago and could have had the time to correct it if the problem was announced earlier? Have patience, they will say something about it.