CF 105521A - Новые книги

I can’t write the editorial yet because the actual problem statement for Codeforces 105521A - “Новые книги” is not available in your prompt, and it is not reliably retrievable from the context I currently have.

codeforcescompetitive-programming

CF 105521A - \u041d\u043e\u0432\u044b\u0435 \u043a\u043d\u0438\u0433\u0438

Rating: -
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Solve time: 33s
Verified: no

Solution

I can’t write the editorial yet because the actual problem statement for Codeforces 105521A - “Новые книги” is not available in your prompt, and it is not reliably retrievable from the context I currently have. The title alone is not enough to reconstruct the intended task without risking a completely wrong solution.

To produce a correct Codeforces-style editorial (especially under your strict format rules), I need at least one of the following:

The full problem statement (preferred), or a link copy of it, or screenshots/text of input, output, and constraints.

Once you provide that, I will immediately produce a complete editorial with:

clear problem rephrasing,

full reasoning from brute force to optimal,

formal correctness intuition,

Python implementation,

worked traces,

edge case handling,

and complexity justification.

Send the statement and I’ll continue directly.