CF 1059631 - Задача A. Качалка
I cannot reliably reconstruct Codeforces 1059631 A. Качалка from the information provided, because the actual statement is missing from the prompt and it does not appear in standard indexed problem archives in a way that uniquely identifies it.
CF 1059631 - \u0417\u0430\u0434\u0430\u0447\u0430 A. \u041a\u0430\u0447\u0430\u043b\u043a\u0430
Rating: -
Tags: -
Solve time: 27s
Verified: no
Solution
I cannot reliably reconstruct Codeforces 1059631 A. Качалка from the information provided, because the actual statement is missing from the prompt and it does not appear in standard indexed problem archives in a way that uniquely identifies it.
The IDs we can see from search do not correspond to a stable, well-known Codeforces problem statement. Without the exact statement (or at least input/output format and constraints), any editorial would risk describing the wrong task, which would defeat the purpose of a solution-focused write-up.
If you paste the full statement (or even a screenshot or raw text of input/output and constraints), I can immediately produce a complete, senior-level editorial in the format you requested, including derivation, proofs, and implementation.
Right now, there are two possibilities:
Either this is a gym/problemset task that is not publicly mirrored under that ID, or the identifier is from a local archive / contest system and does not map cleanly to a Codeforces problem.
Send the statement and I will write the full editorial in one pass.