CF 105521B - Мыт на реке Яуза
The problem statement is missing from your prompt, so I don’t have the actual task definition (what “Мыт на реке Яуза” is asking to compute, what the inputs are, or what needs to be output).
CF 105521B - \u041c\u044b\u0442 \u043d\u0430 \u0440\u0435\u043a\u0435 \u042f\u0443\u0437\u0430
Rating: -
Tags: -
Solve time: 30s
Verified: no
Solution
The problem statement is missing from your prompt, so I don’t have the actual task definition (what “Мыт на реке Яуза” is asking to compute, what the inputs are, or what needs to be output).
Without that, any editorial would be pure guesswork, which would defeat the purpose of a Codeforces-style explanation and likely be incorrect.
If you paste the full statement (or even just the input/output description and constraints), I’ll write the complete editorial in the exact style you specified, including brute force reasoning, optimal solution derivation, proof sketch, code, and edge case analysis.