Posting this early, because it seems that most countries will be boarding the flights to IOI25 pretty soon.

Apparently the guest fee for this year is pretty cheap (650$ per person, down to 600$ if it is shared, instead of the usual 1500 euros). This might be to compensate the high cost of plane tickets? (From what I do know, plane tickets for the Vietnamese delegation is at around 6500$ per person (on total, for the initial and returning flights), which is...quite a lot)

Something that I think the contestants should know (this is some sort of "insider" information but it seems there aren't any issues regarding confidentiality and is probably said to most authors of the tasks submitted for the Call for Tasks): Coming directly from the ISC, this year's Call for Tasks received a "record high" amount of submissions. This is probably a consequence of the inclusion of that stinky doodoo in the IOI24 problemset which is very not funny for a lot of people and caused some very not funny things to happen — People seem to became less afraid of proposing tasks to the IOI knowing even that can get in.

This is to say that, considering the abundance of proposed tasks, it can be expected that the general quality of the problemset is high, and so is the floor for the quality of each individual tasks (not that the IOI24 problemset wasn't filled with 3 unfathomable bangers and 2 decently good problem, just that the other thing is literal dogshit)

Furthermore, looking at the past GA records: The inclusion of the 2 "much easier" tasks in IOI24 (Nile — P1 and M*saic — P5) seems to be a direct response to the "too many zeroes" issue in IOI23. While the IOI23 problemset is just.....really good, it is composed of 6 medium/hard/what-the-hell problems, which annoyed several delegations quite a bit. The "easy" tasks of IOI24 (including M*saic, whose inclusion is purely for the sake of being easy) were added to the problemset precisely in order to "fix" this issue. So, what you should expect is that the ISC/HSC really wants to fix the issues with the problemset.

(Following the above bits of information, this is just a wild guess of mine, but I personally think that the problemset of the 2 competition days will be sorted by difficulty. Last year has UCS (literally the hardest non-heuristic IOI task in the past 20 or so years, in more ways than one according to the statistics) at P4. With its deceivingly difficulty (one liner statement that seems really easy, but is actually batshit insane instead) and the placement, it has lulled many contestants into wasting several hours banging their heads onto a concrete wall. With how the organizing committees tried to accomodate for possible issues, I think that they'll try/experiment with a sorted difficulty for this year. But then, again, just a wild guess. You can believe this, but don't blame me if they put UCS 2: Electric Boogaloo at P1 and the easiest task at P6)

Shout out to PeruvianCartel's latest R18 leak. Can't believe he did this in public. Smhmh

Hour 1 leaderboards:

Generally speaking:

• P1 is the "easy" task, with several ACs already

• P2 looks pretty scary with the 12 subtasks, but 70pts has already been acquired

• P3 got its first 72pts solution around 20 minutes into the contest. Current max is 86, from none other than mr "textsolved the constructive Div1F and won the IMO" himself

The last few hours has been pretty boring, but:

• Despite P2 seeming like an OO, it has been conquerred at around 02:45 (by BreakPlay)

.....who also happens to be the first to conquer the Day1 problemset at 03:15. Congratulations

Now that the 1st competition day has ended, can anyone give out the content of the tasks?