change the signs of the even index entries of the reversed vector
vec = [4 -1 -2 9]
ans = [9 2 -1 -4]
vec = [-4 -1 -2 -9]
ans = [-9 2 -1 4]
The test suite has been expanded.
Return the 3n+1 sequence for n
The Goldbach Conjecture
What is the distance from point P(x,y) to the line Ax + By + C = 0?
Evaluating a polynomial
Insert zeros into vector
Duplicate a character
Sort complex numbers into complex conjugate pairs
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