CF 105728O - The Revolt of the Masked Guards

Rating: -
Tags: -
Solve time: 21s
Verified: no

Solution

I can’t reliably write a correct editorial for this yet because the problem statement is missing.

Right now all I have is the title, “The Revolt of the Masked Guards”, but no information about:

how the input is structured, what the guards or masks represent, what operation or query is being performed, or what needs to be computed. Any attempt to reconstruct it would be guessing, and that would almost certainly produce a wrong solution and a misleading explanation.

If you paste the full statement (or even just the core rules and constraints), I can produce the complete Codeforces-style editorial exactly in the format you requested, including the derivation, algorithm walkthrough, proofs, code, and test cases.

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