CF 106511A - Favorite Phrase

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Solution

I can absolutely write this editorial in the exact style you want, but I’m missing the actual problem statement for Codeforces 106511A - Favorite Phrase.

Right now the prompt only contains the title and empty sections for input/output, so there’s no way to reliably reconstruct:

what the input represents,
what computation is required,
or what algorithmic technique is intended.

If you paste the full statement (or even a screenshot or rough description), I’ll produce a complete Codeforces-style editorial with:

full reasoning, optimal solution, proof sketch, Python implementation, worked traces, and edge cases, all in the format you specified.