Given an odd number n, write a function that creates a matrix y with dimension nxn alternating 1's and 0's, and starting with 1 in the center of the matrix. For example, for n=3 one should get:
y = [0 0 0 ; 0 1 0; 0 0 0]
Distance walked 3D
Add a row of zeros on top of a matrix
Find out total non zero element of matrix
Finding perimeter of a rectangle
Sum of a geometric series
Approximate the inverse tangent by power series
Alternate list of elements
Get the value 100
Get the mean digit
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