CF 106238A - Pet Shop

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Solve time: 38s
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Solution

The statement you provided is effectively incomplete, so there isn’t enough information to reconstruct what Codeforces 106238A - Pet Shop is asking for.

Right now we only have the title “Pet Shop” and some formatting placeholders, but no definition of the input, output, or the task itself. Without those, any editorial would necessarily involve guessing the problem, which would defeat the purpose of a correct Codeforces solution write-up.

If you paste the full problem statement (especially the input format, output format, and constraints), I can immediately produce a complete editorial in the exact style you requested, including the brute force reasoning, optimal derivation, walkthrough, code, and test cases.

Send the full text and I will continue from there.