The interview process consisted of four rounds: three technical rounds and one behavioral round.

The first stage was mostly a discussion about my work, followed by a relatively easy coding task.

The second stage involved two technical interviews back-to-back on the same day with two engineers. They were very smart and friendly, leading to engaging discussions without tricky questions. Each interview consisted of three to four tasks, starting with a simple one, then increasing the difficulty progressively.

If you are well-prepared (LeetCode, CodeSignal, AlgoExpert, etc.), you have nothing to fear.

Overall, I was impressed with the experience because it was fast and professional.

Write a function to calculate the equilibrium index of a given array.