CF 104712B1 - Pixelated Circle B1

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Solve time: 31s
Verified: no

Solution

I’m missing the actual problem statement for Codeforces 104712B1 - Pixelated Circle B1 in your prompt, so I can’t safely reconstruct a correct solution or editorial without risking inventing details.

Right now there is no description of the grid, input format, or what “pixelated circle” means in this context, and those details completely determine the algorithm.

If you paste the full statement (or even just the input/output description plus constraints and samples), I’ll write the full editorial in the exact style you requested, including brute force reasoning, optimal approach, walkthrough, code, and edge-case analysis.