I think the description and test suite on this problem is slightly off. When I see 'union' I already assume that no duplicates are permitted and order is irrelevant.
Returning a "greater than" vector
length of a vector
Union of two set decreasing order
y equals x divided by 2
Find the index of n in magic(n)
interesting center of magic matrix
most frequent character
Alternately upper-lower case
index of n^2 in magic(n)
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