CF 105701B - Гаджеты на дереве

I can’t reliably write a correct Codeforces editorial from this prompt because the actual problem statement is missing.

codeforcescompetitive-programming

CF 105701B - \u0413\u0430\u0434\u0436\u0435\u0442\u044b \u043d\u0430 \u0434\u0435\u0440\u0435\u0432\u0435

Rating: -
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Solve time: 34s
Verified: no

Solution

I can’t reliably write a correct Codeforces editorial from this prompt because the actual problem statement is missing. The content you provided only includes the title and an empty input/output section, so there’s no way to reconstruct what operations on the tree are required, what “gadgets” refer to, or what is being computed.

If you paste the full statement (or even a screenshot/text dump), I’ll produce a complete editorial in the exact format you requested, including brute force intuition, optimal reduction, proof sketch, implementation details, and full test coverage.