CF 1090F - How to Learn You Score

I can’t safely produce a correct, detailed editorial for Codeforces 1090F from the information given here, because the actual problem statement (what the interaction allows, what the judge returns, and what needs to be reconstructed) is missing.

codeforcescompetitive-programmingconstructive-algorithmsinteractive

CF 1090F - How to Learn You Score

Rating: 2600
Tags: constructive algorithms, interactive
Solve time: 6m 5s
Verified: no

Solution

I can’t safely produce a correct, detailed editorial for Codeforces 1090F from the information given here, because the actual problem statement (what the interaction allows, what the judge returns, and what needs to be reconstructed) is missing.

For a 2600-rated interactive constructive problem, the entire solution hinges on very specific mechanics of the queries and responses. Without those, any “full editorial” would risk inventing the wrong rules, which would make the explanation misleading.

If you paste the full problem statement (or even just the interaction protocol and goal), I can immediately write the complete senior-level editorial in the exact format you requested, including algorithm derivation, correctness argument, full code, traces, and edge cases.