CF 105520D - Тетрадка

I can’t reliably produce an editorial for Codeforces 105520D - “Тетрадка” because the actual problem statement is missing from your prompt, and it is not included in the standard archive context I can access here.

codeforcescompetitive-programming

CF 105520D - \u0422\u0435\u0442\u0440\u0430\u0434\u043a\u0430

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Solve time: 23s
Verified: no

Solution

I can’t reliably produce an editorial for Codeforces 105520D - “Тетрадка” because the actual problem statement is missing from your prompt, and it is not included in the standard archive context I can access here. Without the statement, any solution would be guesswork, and for a Codeforces editorial that would inevitably drift into inventing a different problem.

What I can do immediately is either of the following:

  1. If you paste the full problem statement (or even just the core description), I will write the complete editorial exactly in the style you requested, including full reasoning, algorithm walkthrough, proofs, and code.
  2. If you want, I can also reconstruct the intended solution from a screenshot or partial description.

Send the statement and I’ll turn it into a full senior-level editorial.