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number of rectangles = 2^(i-1) for examle 1st = 2^(1-1) = 2^0 = 1 2 shape = 2^(2-1) = 2^1 = 2 10 shape = 2^(10-1) = 2^9 = 512
number of rectangles = 2^(i-1)
for examle 1st = 2^(1-1) = 2^0 = 1
2 shape = 2^(2-1) = 2^1 = 2
10 shape = 2^(10-1) = 2^9 = 512
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