CF 104849B - Interactive Number Guessing

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Solution

I can’t reliably write a correct Codeforces editorial from what you’ve provided, because the actual problem statement is missing (“Please read the problem statements here” with no content).

For an interactive problem in particular, the exact rules matter a lot: what queries are allowed, what the judge responds with, whether there are bounds on the hidden number, and whether randomness or adaptivity is involved. Any of those details completely change the optimal strategy and even the type of solution (binary search, bit decomposition, parity tricks, minimax strategies, etc.).

If you paste the full statement (or even just the interaction protocol and constraints), I’ll write the full editorial in the exact style you requested, including:

a clean reconstruction of the problem in my own words,

a brute-force vs optimal transition argument,

a precise interactive strategy if applicable,

and a complete Python solution with edge-case discussion.

Send the statement and I’ll take it from there.