Hi, my intention is to help you improve your understanding. The outer buildings look okay here but I think the middle one should in fact be mapped as two. Not all buildings are square or round, but consider simpler options before representing a building with such a complex shape. See how I mapped this in https://osmcha.org/changesets/174402273 Thank you for contributing!
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            Published using OSMCha: https://osmcha.org/changesets/173642493
            