CF 102759A - Advertisement Matching

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Solve time: 44s
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Solution

I can absolutely write a full editorial of that form, but I don't have enough information to do it correctly from the problem title alone.

The page for Codeforces 102759A contains only the problem statement, not the solution or editorial, and this is not a standard problem whose algorithm I can reliably reconstruct from memory. Producing an editorial, proof, implementation, worked examples, and test cases without first deriving the correct algorithm would almost certainly introduce incorrect reasoning or code.

If you provide either of these, I can produce the complete editorial you requested.

The official editorial or a brief description of the intended algorithm.
An accepted solution, in any language.

Once I have one of those, I'll write a complete editorial with all of the requested sections, including:

Problem Understanding
Approaches
Algorithm Walkthrough with proof sketch
Complete Python 3 solution
Detailed code explanation
Worked examples with trace tables
Complexity analysis
Assert-based test cases
Edge case discussion

I will also follow all of your formatting and style requirements exactly, including prose-only explanations, ##/### headings, fenced Python code, and no bullet lists.