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Idea: ToxicPie9
Preparation: flamestorm
Hint
Solution
Video Editorial
Feedback
Idea: BucketPotato
Preparation: BucketPotato
Hint
Solution
Feedback
Idea: ToxicPie9
Preparation: ToxicPie9
Hint 1
Hint 2
Solution
Feedback
Idea: AlperenT
Preparation: AlperenT
Hint 1
Hint 2
Hint 3
Solution
Feedback
1812E - Not a Geometry Problem
Idea: ToxicPie9
Preparation: ToxicPie9
Hint
Solution
Feedback
Idea: flamestorm
Preparation: flamestorm
Hint
Solution
Feedback
Idea: flamestorm
Preparation: flamestorm
Hint 1
Hint 2
Solution
Feedback
Idea: ToxicPie9
Preparation: ToxicPie9
Hint 1
Hint 2
Solution
Feedback
Hint
Solution
Feedback
Idea: ScarletS, ToxicPie9, et al.
Preparation: ToxicPie9, ChatGPT
Hint
Even Bigger Hint
Solution
Feedback
I knew what I was doing clicking on the "Video Editorial" link. Was not disappointed)
Another guessforces round? Come on codeforces
F: https://www.dcode.fr/prime-factors-decomposition did the trick :)
Or factordb
There is another way to solve problem F
200166327
the best contest i have ever done!
There were some who solved B in another way. 2015 is the only year that did not have an April Fools round, and 2020 and 2021's rounds had a problem "Is it rated?" and the answer was a clear NO. In other years it's just YES
I was 168th on contest to first time WOW
https://math.stackexchange.com/questions/2900616/what-le-500-digit-number-has-62-118-steps-collatz-conjecture
http://www.ericr.nl/wondrous/index.html
If anyone is interested in the 142023 limitation of D, you can read this two. This is helpful. The above article provides a good generation method, and the following article guesses that the solution exists.
is it rated ? was it rated ? Guess the next....
Will it be rated?
problems are tarsh el tarsh
Is your profile picture yourself?
Using Ai as jury was amazing, Is it possible to see new problems based on that ?
Thanks to all authors for very good contest, every problem is genius, and my favourite one is $$$H$$$. By the way, does anyone know, is there any website or something for competitions like April Fools Day Contest? From year to year I like this contests more and more, will be cool to participate in something like that more often than 1 time in a year
In problem G, is the green really #01722B? I find it is #007327.
Getting the same thing:
Download the image to see the color. The color seems a little different on website.
The colour on the downloaded image still seems to be #007327:(
I imported the downloaded image into GIMP, then I got #01722B.
Anyone else who thought B meant the last 25 contests? Coincidentally, the 15th contest (counting from the most recent) actually was unrated...
I think so too... actually the 25th contest (counting from the most recent) was also unrated and n<=25, so I thought it was the right approach.
I wish every other were also this easy!!! :D
My whole contest experience was terrible due to the internet problems. And for problem B when I went to check whether the 25 rounds rated, codeforces told me 'The page is temporarily blocked by administrator.' :(
I thought it was made on purpose. I tried API, didn't work as well. I had to use Wayback Machine...
All right, I had never heard of it, but I have now. Thx~
best contest!!!!!
I solved Problem D — Trivial Conjecture by finding the number. Submission: 200174057
The one I used is: 274133054632352106267
I found it on an obscure site linked on a github page. I don't actually know how long the sequence is though, since the site only cites the biggest number reached. Here being 56649062372194325899121269007146717645316.
not the rickroll...lmao