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### .o.'s blog

By .o., 12 days ago, ,

I was watching https://codeforces.com/api/contest.ratingChanges?contestId=1301 for several hours. The intention was to see whether the ratings are recalculated each time after Mike finds a cheater.

I extracted the list of handles and stored them in a set using the following code.

import json

with open("1581617404-200.json") as f:

with open("1581690606-200.json") as f:


I thought past - later should contain handles of cheaters (or equivalent), and later - past should contain handles of innocent guys who were considered wrongly as cheaters before. Let's see the results:

>>> past-later
{'ignacy.boehlke', 'black_clown'}
>>> later-past
{'Bombylius', 'KSW'}


Let's see what happened to ignacy.boehlke. When you click the link, you can see

Spoiler

Then, let's see what happened to black_clown. When you click the link, you can see

Spoiler

It seems for some gifted people new year gifts are still available. KSW and Bombylius, could you guys please share your secret tips?

• +25

 » 12 days ago, # |   +68 I believe its because we can change handle once within about a week or so after registering.
•  » » 12 days ago, # ^ |   +22 Wow that was really a secret tip, thanks for letting me know.
 » 11 days ago, # |   -6 I have the same experience before. Someones submission accepted for my account and kater i got punished because of it.
 » 11 days ago, # |   +44 I didn't do anything special, I just changed my handle after the contest.
 » 10 days ago, # |   +31 I just changed my handle too!