CF 104642D1 - Cubic UFO D1
The problem statement is missing from your prompt, so there is no way to reconstruct the required model, operations, or solution logic for “Codeforces 104642D1 - Cubic UFO D1”.
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Solve time: 29s
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Solution
The problem statement is missing from your prompt, so there is no way to reconstruct the required model, operations, or solution logic for “Codeforces 104642D1 - Cubic UFO D1”.
For Codeforces editorials, the structure of the solution is completely driven by the rules of the task (what is being computed, what transformations are allowed, and what constraints exist). Without that, any attempt to write an editorial would be guesswork and very likely incorrect.
If you paste the full statement (or even just the input/output description plus constraints and a sample), I can immediately produce the full editorial in the format you specified, including the algorithm derivation, correctness argument, Python solution, and test coverage.