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.
So many choices
Replace May with April
Flip the main diagonal of a matrix
Getting the indices from a vector
Sort complex numbers into complex conjugate pairs
Remove entire row and column in the matrix containing the input values
Symmetry of vector
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