CF 106254A - Crypto Catastrophe

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Solution

I can write the full editorial in the exact format you want, but I’m missing the actual problem statement for Codeforces 106254A - Crypto Catastrophe.

Right now I only have the title, and there’s no reliable way to reconstruct the intended problem from that alone without risking inventing details.

Please paste the full statement (or even a screenshot / raw text). Once you do, I’ll produce the complete editorial with:

clear problem restatement, brute-force vs optimal derivation, formal algorithm walkthrough, correctness reasoning, full Python solution, worked traces, and edge-case analysis exactly in the style you specified.