Set x value to each even index of vector y.
Compute a dot product of two vectors x and y
Given a window, how many subsets of a vector sum positive
Determine the square root
Calculate roots of polynomial given as vector array.
Count given word x in text.
For given xx,x, y vectors build spline of x and y and find yy values for xx vector.
Calculate the sum of elements of n*n Hilbert matrix.
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