test case #2 is not correct.
The problem description should be change to "and the sum of non-prime numbers up to the greatest prime lower than x".
Given an unsigned integer x, find the largest y by rearranging the bits in x
Generate N equally spaced intervals between -L and L
Dimensions of a rectangle
Compare two input matrices
Alternating 1´s and 0´s in a matrix
Approximate the inverse tangent by power series
Alternate list of elements
Sum of a geometric series
Check if is a square
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