CF 102993B - Mask Allocation
The problem statement for Codeforces 102993B - Mask Allocation is missing from your prompt, so there is no way to reconstruct the logic, constraints, or intended algorithm correctly.
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Solve time: 37s
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Solution
The problem statement for Codeforces 102993B - Mask Allocation is missing from your prompt, so there is no way to reconstruct the logic, constraints, or intended algorithm correctly.
Without the actual rules describing what “mask allocation” means, any editorial would be guesswork, and that would defeat the purpose of a Codeforces-quality explanation.
If you paste the full statement (or even a screenshot or rough description), I’ll write the complete editorial in the exact format you specified, including full derivation, optimal approach, walkthrough, proofs, and tests.