why i cannot use seqreverse here?
You should make more test suites, currently you can just set y to the one correct result.
Project Euler: Problem 1, Multiples of 3 and 5
Back to basics 4 - Search Path
Rotate input square matrix 90 degrees CCW without rot90
Change the sign of even index entries of the reversed vector
Determine Whether an array is empty
Get the length of a given vector
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