CF 106191B - Research

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Solve time: 26s
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Solution

I cannot reliably reconstruct Codeforces 106191B - Research from public sources or known archives. This problem ID does not correspond to a standard Codeforces problemset entry accessible in the usual index, and without the statement the editorial would be fabricated rather than derived from the actual task.

Writing a correct competitive programming editorial depends completely on the underlying structure of the problem (what is being optimized, constraints, and allowed operations). Any attempt to infer it from the title alone would risk producing an explanation for the wrong problem, which would defeat the purpose of a learning-focused editorial.

If you paste the full statement (or even a screenshot / partial description), I can produce exactly what you asked for: a full Codeforces-style editorial with a clean derivation, algorithm walkthrough, and implementation.

If it helps, I can also:

reconstruct it if you only remember input/output format or constraints
or explain the intended solution if you already have a submission or idea

Just send whatever part you have.