CF 102740D - Combo Counter

I can write the full editorial, but the problem statement for Codeforces 102740D - Combo Counter is missing from your prompt, and I could not reliably retrieve the statement from the problem ID alone.

codeforcescompetitive-programming

CF 102740D - Combo Counter

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Solve time: 25s
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Solution

I can write the full editorial, but the problem statement for Codeforces 102740D - Combo Counter is missing from your prompt, and I could not reliably retrieve the statement from the problem ID alone. I do not want to invent the rules, constraints, examples, or algorithm and give you a wrong editorial.

Please paste the full problem statement (including input, output, and samples), and I’ll produce the complete editorial in the requested format with the explanation, proof sketch, Python solution, walkthroughs, tests, and edge cases.