Hello CodeForces!

After getting a great solve on today's problem D, I was viewing the contest leaderboard to see how my fellow contestants were doing. I was shocked to see that lebronjamal, an unrated user, was in 21st place. At first, I was deeply impressed. This is a far better performance than I'd managed in my near 6 months of competing.

However, a shadow was soon cast onto my respect for this user. When reviewing lebron's submissions after the contest, I noticed something puzzling. Their submission to problem E had the riddle seen below: while short, it seems surprising to me such a skilled user should take the time to write this rather than taking the head start on problem F.

Here is another riddle. I asked my favorite LLM, Claude's Opus 4.9, whether this could be evidence of unfair behavior. I've filled in the blanks with its solution. As you can see, it reads: "I cheated in this contest using artificial intelligence". If true, this is perhaps the most condemning piece of evidence so far.

Fellow contestants: leave a comment on this blog post with your thoughts. Should action be taken against this individual?