CF 105500I - Cyclic Melody
The prompt is missing the actual problem statement for “Codeforces 105500I - Cyclic Melody”, and the Input/Output sections are empty.
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Solve time: 26s
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Solution
The prompt is missing the actual problem statement for “Codeforces 105500I - Cyclic Melody”, and the Input/Output sections are empty. Without that, any editorial would be guesswork, and for a competitive programming write-up that would inevitably drift into inventing constraints and mechanics that may not match the real task.
Paste the full problem statement (or even just the core description and constraints), and I’ll write the complete editorial in the exact format you requested, including algorithm derivation, proof sketch, implementation, examples, and tests.