The problem statement is the title of the problem.

Re-read the original announcement blog.

If you carefully read the announcement blog, you will notice that I especially thanked BucketPotato for testing. Just print "BucketPotato".

Did you notice the peculiar constraints on the variable $$$r$$$?

"Mike" is of course MikeMirzayanov. "Mike's sequence" has to do with Codeforces ratings.

3000 is the cutoff for the highest rating: Legendary Grandmaster.

Mike's sequence are the Codeforces rating thresholds: [1200,1400,1600,1900,2100,2300,2400,2600,3000]. Your task is simply to print the threshold immediately above the provided rating $$$r$$$.

Aenar Targaryen was a dragonlord of Old Valyria.

The main clue is the title: "Pōja Verdon".

Aenar Targaryen was a dragonlord of Valyria (an empire from a \textit{A Song of Ice and Fire}) who moved his family to Westeros right before Valyria was destroyed.

pōja means their and verdon means sum (or amount based on context) in High Valyrian (you can easily translate this on Duolingo).

In a nutshell: Print the sum of the array.

Did you notice that the problem had a special "constraints" section? That's highly unusual for a Codeforces problem.

The length of S is 3. Are there any famous three letter programming contests?

The capital variable letters and the "constraints" section are designed to mimic how atcoder.jp formats their problem statements.

The problem is asking whether the Atcoder contest (ABC,ARC,AGC) is rated for a rating $$$X$$$. (Note that the judge ignores Atcoder heuristic contests for simplicity).

• ABC's are rated for $$$[0,1999]$$$
• ARC's are rated for $$$[0,2799]$$$
• AGC's are rated for $$$[1200,\infty]$$$

Do you recognize the story of the Minotaur?

The problem is a word search, but not for the word "minotaur".

Perhaps you recognize the story of the minotaur? Less known is the hero who saved the kids from the minotaur: his name was Theseus [thee-see-us].

The problem is just a word search (horizontal, vertical, diagonal) for theseus. You should only go in the forward direction when you search for a word.

The grid contains other clues embedded in it. Perhaps you can find esoteric, java, and script (hints for problem G). You might be able to find atcoder (hint for problem D). Also hero (hinting at Theseus for this problem).

There are also some red herring words out there.

Where is the quote from?

"buffy", "the", "vampire", "slayer"

"buffy" (length 5), "the" (length 3), "vampire" (length 7), "slayer" (length 6). Now go back to the sample and see what you can do.

The quote is from the well known TV series Buffy the Vampire Slayer.

Perhaps you notice the lengths of the words buffy, the, vampire, slayer are unique integers in the set {3,5,6,7}.

Given the string $$$s$$$, simply do a forward shift with the target word of the same length. For example, ccccc is paired with buffy which goes to dwhha.

However, if the length of $$$s$$$ is $$$4$$$, the answer is "none".