CF 105679A - Kowloon Walled City
The problem statement is missing from your prompt, so there is no way to reconstruct the task, constraints, or required output reliably.
CF 105679A - Kowloon Walled City
Rating: -
Tags: -
Solve time: 31s
Verified: no
Solution
The problem statement is missing from your prompt, so there is no way to reconstruct the task, constraints, or required output reliably.
Codeforces problem numbers alone are not sufficient here because “105679A - Kowloon Walled City” does not correspond to a standard publicly known statement in the usual archive formats, and different contests sometimes reuse internal IDs.
To write a correct editorial in the style you requested, I need at least one of the following:
The full problem statement text (preferred), or
A summary of what the input represents and what must be computed, or
A link to the problem.
Once you provide that, I can produce a complete editorial with the structure you specified, including algorithm derivation, proof, implementation, and test cases.