actually FirstComp had no reason at that particular moment, but anyways the comp was starting at 0. I didnt recall that b was always going to be squared array. Thank you, figured it out.

What's firstComp for? You're not checking for the same multiplicity. And the numbers on b should be the numbers on a, squared.

Given two arrays a and b write a function comp(a, b) (compSame(a, b) in Clojure) that checks whether the two arrays have the "same" elements, with the same multiplicities. "Same" means, here, that the elements in b are the elements in a squared, regardless of the order.

Yep, my fault.

You're welcome, make sure you see other's code and check how they solved it.

You should use your vars inside your function, and use parameters in your functions. I think your problem is there (sum will have the added value of a lot of tests, it's never initialized).