A skipped week

Codeforces Global Round 29 was the main event of last week (problems, results, top 5 on the left, analysis). Only 3 participants managed to solve the 5500-point problem H, and they occupied the first three spots. Well done to ecnerwala, jiangly and ksun48!

The big story of the round though was the solve count for problem G. According to the screenshot in this post the solve count was at 184+ when the round ended, while the final standings had just 48, so 136+ solutions were removed because of cheating. The two most likely types of cheating would be using AI to solve the problem and getting help from other people. Of course, one could also use both :) I saw speculations about both types happening in this case, but I am not sure if there is any public analysis on which type dominated this time. Have you seen one? The raw data on the solutions deemed to be cheating seems available in this search (it has 200+ solutions though, so maybe it overcounts?).

Of course, huge thanks to the Codeforces admins for trawling through the submissions and taking action to preserve the integrity of the competition! Before this case I somehow expected the number of cheating disqualifications to be much lower, even though I have seen numerous discussions of the issue. Would this push the competitive programming world to have more onsite contests with no internet access?

Thanks for reading, and check back next week!