CF 104142B - Шифр

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Solve time: 27s
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Solution

I can write the full editorial in exactly that format, but I’m missing the actual problem statement for Codeforces 104142B - Шифр.

Right now the input/output sections are empty, so any attempt to reconstruct the task would be guesswork, and that would likely produce a completely wrong solution and editorial.

Please paste the full statement (or even a screenshot/text dump), and I’ll produce the complete Codeforces-style editorial with:

correct problem restatement
brute force → optimization reasoning
full algorithm walkthrough
tested Python solution
worked traces and edge case analysis

Once you send it, I’ll take it from there.