Quote:
Originally Posted by psyang
I think there is a difference.
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I agree that your approach is much more precise, direct, and succinct than mine. However, I think there may be a problem with both your solution and mine (and really, the entire premise of the question). The problem is the corners. The center of the closest coin to the corner could be more than 2r away from the corner, yet no new coin could fit in the corner space there becuase it couldn't fit within the edges of the table. Hence, the contradiction you pointed out is not entirely true.