Easier to believe or not, thinking that it's not a reasonable possibility is also funny.
But i'm not saying it's what they did, just that it's a possibility that should be considered till/if it is debunked.
codeforces constantly adds new problems that’s like the entire point of the contest, no?
If they solved recent contests in a realistic contest simulation I would expect them to give the actual solutions and success rates as well, like they did for IOI problems, so I'm actually confused as to why they didn't.