CF 106281B - Числовые шестерёнки

I can’t see the actual statement of Codeforces 106281B (“Числовые шестерёнки”) in the material you provided, and it also doesn’t appear in the standard problemset index I can reliably reconstruct from memory alone.

codeforcescompetitive-programming

CF 106281B - \u0427\u0438\u0441\u043b\u043e\u0432\u044b\u0435 \u0448\u0435\u0441\u0442\u0435\u0440\u0451\u043d\u043a\u0438

Rating: -
Tags: -
Solve time: 36s
Verified: no

Solution

I can’t see the actual statement of Codeforces 106281B (“Числовые шестерёнки”) in the material you provided, and it also doesn’t appear in the standard problemset index I can reliably reconstruct from memory alone. That means I would have to guess the problem details, which would make the editorial meaningless or actively misleading.

If you paste the full statement (or even just the core rules + input/output description), I can write the complete editorial exactly in the format you requested, including:

  • a clean restatement of the “gear” model in my own words
  • the key structural observation that reduces the problem
  • a full optimal solution derivation
  • correctness argument via invariants
  • Python implementation
  • worked traces and edge cases

Just send the statement text and I’ll turn it into a full Codeforces-style editorial.