CF 102893C - Check Markers
The problem statement is missing from your prompt, so there’s no way to correctly reconstruct the task, constraints, or required output for “Codeforces 102893C - Check Markers”.
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Solve time: 35s
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Solution
The problem statement is missing from your prompt, so there’s no way to correctly reconstruct the task, constraints, or required output for “Codeforces 102893C - Check Markers”.
Without that, any editorial would be fabrication rather than explanation, and it would defeat the purpose of a solution walkthrough.
If you paste the full statement (or even just input/output description plus constraints), I’ll produce the complete editorial in the exact format you requested, including algorithm derivation, proofs, Python solution, and test cases.