CF 105873J - JuPaels Palindrome

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Solve time: 23s
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Solution

I can write the full Codeforces-style editorial, but I’m missing the actual problem statement content for 105873J - JuPaels Palindrome (the Input/Output section is empty in what you provided).

Without the statement, any “solution” would be guesswork, and that would defeat the purpose of a correct editorial.

If you paste the full problem (or even a screenshot/text of it), I’ll produce the complete senior-level editorial exactly in the format you specified, including derivation, edge cases, proofs, and a working Python solution.