CF 106235B - Proof of Incorrectness

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Solve time: 28s
Verified: no

Solution

I don’t actually have the statement of Codeforces 106235B - Proof of Incorrectness available, and I can’t reliably reconstruct it from the title alone without risking inventing details.

To write a proper editorial in the style you requested (with correct reasoning, algorithm, proofs, and tests), I need at least one of the following:

the full problem statement, or
a link + a short summary of what the task asks, or
input/output format and constraints.

Once you paste that, I’ll produce a complete senior-level editorial with derivation, proof sketch, and implementation.

If you want, you can also just paste the core idea in one sentence like “given X, we must output Y minimizing Z”, and I can reconstruct everything from there.