In this problem, the author is imagining again an abstract pyramid made by layers of square matrices of zeros that decrease evenly until the top is reached (the top is made by ones; for instance, a pyramid of base 5(n) would be zeros(5)-> zeros(3) -> ones(1)). We are looking at the pyramid from the top view (that's why is flattened).
Check if sorted
Filter AC, pass DC
Find the maximum two numbers of every column of a matrix
Find the index of n in magic(n)
Max Change in Consecutive Elements
Height of a 3D Pyramid
cross-section of 3D pyramid
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