Compute the derivative of a given polynomial. The input is an array of coefficients of polynomials.
Input is [2 0 5]
Output is [4 0]
Find the numeric mean of the prime numbers in a matrix.
Implement a ROT13 cipher
sum of non-primes
Given a 4x4 matrix, swap the two middle columns
construct matrix with identical rows
Altitude of locations on the earth
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