Find the fourier transform of a given input vector
for ex a=[1 2 3 4]
then y=[ 10.0000 + 0.0000i -2.0000 + 2.0000i -2.0000 + 0.0000i -2.0000 - 2.0000i]
Count up then down
Duplicate a character
sum of first 'n' terms
Area of an equilateral triangle
Change the first and last diagonal element of the identity matrix to zero
Area of a circle
Maximum value in a matrix
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