CF 103643O - Painting Fences (Hard Version)

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Solve time: 26s
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Solution

I don’t have the actual statement of Codeforces 103643O - Painting Fences (Hard Version) in your prompt, so I can’t safely reconstruct the problem or write a correct editorial without risking inventing details.

Send either:

the full problem statement, or
a link + brief summary of rules/constraints

and I’ll produce the complete editorial in the exact format you specified.