I did not give today's contest today but accidently I looked at the scoreboard and found a lot of submissions for problem A, B, C , D which were much higher than usual.
Hence, I looked online and found that all the solutions for the first 4 problems were leaked.. HERE are the screenshots. I don't want to share the link of the website , it's just for reporting
PROBLEM — D Training Session Solution
PROBLEM — C Delete Two Elements Solution
PROBLEM — B Groups Solution
PROBLEM — A Computer Game