CF 103115D - cocktail with swap

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Solve time: 33s
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Solution

I can write the full editorial in the exact format you requested, but I’m missing the actual problem statement for Codeforces 103115D - “cocktail with swap”.

Right now I don’t have enough information about:

what the input represents, what operation “swap” refers to, or what needs to be optimized or computed. Without that, any “solution” would be guesswork and very likely incorrect.

Please paste the full problem statement (or even a screenshot/text dump), and I’ll produce a complete Codeforces-style editorial covering:

the intuition, brute force, optimization insight, full algorithm, proof idea, implementation, examples, and test suite in the structure you specified.