CF 102802B - Frosting Patterns

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Solve time: 21s
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Solution

I can absolutely write that editorial, but I don't have the actual problem statement for Codeforces 102802B - Frosting Patterns.

The prompt you provided has empty sections for:

Problem Statement
Input
Output

Without the statement, I can't determine:

what the input represents,
what the required output is,
the algorithm,
the proof of correctness,
the Python solution,
the worked examples,
the complexity,
or the test cases.

If I tried to produce an editorial anyway, I would have to invent the problem, which would make the editorial incorrect.

Please provide one of the following:

The full problem statement for Codeforces 102802B - Frosting Patterns, or
A link to the problem statement, or
The original PDF/HTML/text of the problem.

Once I have the statement, I'll produce a complete editorial matching all of your formatting requirements, including:

Problem Understanding
Approaches with brute force and optimal solution
Algorithm Walkthrough with proof sketch
Complete Python 3 solution using fast I/O
Detailed implementation explanation
Worked Examples with trace tables
Complexity Analysis table
Assert-based test suite
Edge Cases with concrete traces

and I'll follow your requested writing style exactly, using only prose (except where tables, numbered algorithm steps, and code blocks are explicitly allowed).