Fruits Basket: The Final

Around the New Year's time, people have the option of changing their COLOR temporarily for fun. The ratings remain unaffected. Only the color and the title change.

It was for a brief amount of time.

The website is up now. Contest delayed by 1 hour.

CodeChef really is helping people improve so much. Just look at the level of some people. Solving 4th and 5th in the last hour without any Wrong Answer. ORZ.

I think orange looks really cool ngl

I guess my name was not mentioned in the testers' list :(

Pink slips instead of delta?

Fixed it. Thanks brother. That was some really NSFW stuff. Can't believe that a simple missing character can lead to such a thing.
Don't know how many people would actually go to the previous link to see what it was ;)

Yeah I was also surprised. But check Math Stack Exchange and Reddit. Basically, there are many inconsistencies in his proof. Quoting from the above Stack Exchange answer -

He takes a trivially true statement, then states that this implies something similar enough to sound reasonable to the layperson but falls apart under the smallest of analysis.

So, basically its wrong and hence no one is talking about it.

Just watch Neon Genesis Evangelion and all other bugaboos will become easy to understand.
Oh and did I mention that it will also cure your depression?

I just noticed that many people forgot to print the value of k in the first bugaboo which made for a lot of Wrong answer on pretest 1. I thought I was the only one :)

When the problemsetters have plans for the night:
Source: 1526B - I Hate 1111

Via 1529B — Sifid and Strange Subsequences

It is mentioned above that

Participants are invited to build a predictive model based on the provided historical data

So, it is not a normal CF contest.

For anyone wondering what GLHF (in the last line) means — Good Luck, Have Fun!

Notice the unusual starting time :)

That is basically because of two things:
1. Using GNU C++17 (64) instead of the 32 bit version.
2. The presence of these two lines at the top:

#pragma GCC optimize("O3")
#pragma GCC target("avx2")

Remove any of those and you get a TLE :)

Edit: Why so many downvotes? I don't think I said anything wrong. If you don't believe me then try for yourselves.

For problem F, after around 20 mins of head scratching, this website saved me :)

The only results appearing related to "Xenodrome" are of Ben 10 XD

When Problemsetters don't want the police to bother them! Credits — Problem G
(For those who don't know, "AEZAKMI" is a cheat code in GTA San Andreas to escape from the police permanently)

I wish this contest took place today. For single guys like me this could have been the perfect valentine :'(

I earlier posted it there but for some reason it got removed.

I see what you did there ;)

Problem — Floor and Mod

Damn! This doesn't make any sense. I live in India and here this fees is LITERALLY around $13. And these guys are taking more than 100 times that?? Feels bad that people are not able to compete just because of some organization that wants to make profit.

Problem D looks like a graph problem
Editorial — Well yes, but actually no!

I wonder who's gonna read all those interesting stories?

Finally a contest with less ad-hoc!

Your mistake is that you forgot to put a continue after cout << NO << endl in the first if block of your code :)

If you are talking about taking some a_i = 21 and d = 2, then 21 itself is a lucky number as it contains d = 2 in its representation already and doesn't need to be expressed as sum of other lucky numbers, So, answer is YES.

For anyone not knowing what WLOG means in editorial for Div.2 C,
WLOG = Without Loss Of Generality.

Notice the unusual solving time (135 mins).

LMAO. Still, you gotta appreciate the effort though XD! For the testers to change their ratings so much and for DS007 to properly format it.

I like how the testers' names are arranged in order of the lights to the left of the logo!

Will Monogon Comment Here Or Has Mono Gone??!!