Apart from the above mentioned YouTube channel, the solution: CodeChef: Practical coding for everyone also matches 100% with the solution circulated on the telegram group: HERE, during the contest.
The solution: CodeChef: Practical coding for everyone also matches with the solution circulated on the telegram group: HERE, during the contest.
I’m attaching the screenshots below.
There is a fair chance that the user is using Telegram and YouTube channels to copy solutions.

