Am I crazy, or do the rating change calculations for Codeforces Global Round 31 seem off?

Правка en2, от christopherbitti9, 2025-12-19 22:30:55

My rating went from 1561 to 1587 for a grand total net gain of +26. I solved A-C and ranked 2665 out of 16287. According to CList, problem C is roughly an 1870 rated problem. The last time I managed to solve a problem in or near Candidate Master territory (Palindrome Flipping), my rating went up more than 140 points! This time, I only gained 26 points. Is this because of cheaters? But even then, after the contest I tried Gemini 3 Pro on problem C and it gave an incorrect solution. Were some of the harder problems AI solvable?

I even asked Gemini 3 Pro how much rating gain I should expect given my rank and the fact that it was a Div 1 + Div 2 round and it said AT LEAST +50. Usually when I ask Gemini to predict my rating change it's pretty accurate. Maybe this round had a much weaker pool of competitors than usual? I don't know man, I kind of feel scammed. I thought I would for sure reach expert this time.

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en2 Английский christopherbitti9 2025-12-19 22:30:55 76
en1 Английский christopherbitti9 2025-12-19 22:29:14 933 Initial revision (published)