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.
Arrange Vector in descending order
Get the length of a given vector
Make a random, non-repeating vector.
Find the logic
Product of Array
index of n^2 in magic(n)
Alternately upper-lower case
Sum of odd numbers in a matrix
Find the index of n in magic(n)
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