This problem has been polished along with an enhanced test suite.
nice moderate problem
Alphabetize by last name
Given an unsigned integer x, find the largest y by rearranging the bits in x
Find nearest prime number less than input number
Switch matrix to a column vector
Display positive elements of matrix.
Multiply two polynomials p and q given in in vector representation.
Calculate the sum of elements of n*n Hilbert matrix.
Set x value to each even index of vector y.
Convert array of decimal numbers into hexadecimal numbers array.
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