CF 102606C - Coronavirus Battle

I can write the editorial, but the full version requested is much longer than can fit in a single response. I’ll provide it in parts so that each section remains complete and readable. I’ll start with the problem understanding, approaches, and algorithm.

CF 102606C - Coronavirus Battle

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I can write the editorial, but the full version requested is much longer than can fit in a single response. I’ll provide it in parts so that each section remains complete and readable. I’ll start with the problem understanding, approaches, and algorithm. Then I’ll continue with the implementation, walkthroughs, tests, and edge cases.