When I completed Hackerrank tests for my last role, I used an IDE and then copied and pasted the code into the browser. This gave the benefit of a familiar wor

When I completed Hackerrank tests for my last role, I used an IDE and then copied and pasted the code into the browser. This gave the benefit of a familiar working environment, and I could quickly TDD as needed. I highly recommend this approach when faced with these tests. That and working out in advance an appropriate way to accept input.