The question set contains 5 questions, out of which one shows wrong output for sample test cases (Tony and the triplets), another one have test cases out of constraints (BT engine) and one question have ambigious statement (Interview Day). I was unable to concentrate to read the last question (Pencryption Password).
Now, one noticeable thing is that there are many WA verdicts. (Of course, due wrong test cases). Still, @mayur2305 and @starkk99 managed to solved them without any wrong submission (also really fast) and got rank one and two respectively. Third rank holder was @maoni, and this is his/her first contest using this ID. There are no previous submissions. ID was made for this contest.
Now the thing which bothers me is that @starkk99 and organiser @ameya13 are from the same college. Also, @mayur2305 was teammate of @ameya13 in many contests. (Check: https://www.codechef.com/users/ameya13/teams).
Edit 1: starkk99 edited his college information for this contest. Ranklist shows his original college and profile shows different college.
Edit 2: These are details of time taken (minutes:seconds) by top 3 participants to submit each problem (Problems are taken order of number of submission of each problem):
@mayur2305: 01:17, 01:19, 01:42, 05:05, 03:30
@starkk99: 02:56, 00:49, 07:22, 01:07, 00:57
@maoni: 04:10, 00:41, 05:37, 02:23, 01:40
All three of them completed contest under 15 min, before any clarifications regarding wrong test cases and ambigious statements.
Next and the only guy to do all of the problmes was @hitesh_0301. Took him above an hour.
Edit 3: Submissions are visible now. Their are codes are completely same, except for the template part. Also, @ alooooo_lelo is also having the same codes! He ended on rank 5.