CF 105728B - Red Light Green Light

Rating: -
Tags: -
Solve time: 28s
Verified: no

Solution

I don’t have the actual statement of Codeforces 105728B (“Red Light Green Light”) available in this context, and I can’t reliably reconstruct it without risking inventing details that may be wrong.

If you paste the full problem statement (or even just the input/output description and constraints), I’ll write the complete editorial in the exact style you requested, including a full algorithm walkthrough, proof sketch, implementation, and tests.

Just send it over and I’ll take it from there.