Tesla Software Engineer interview questions

Was reached out for an interview by a recruiter from Tesla via Linkedin Round 1: Codility Questions Phone round: basic-calculator-ii The process was nice and I was able to come up with a solution but I had to take some hints to solve this and I was following a more intuitive approach to the solution(didn't use stacks) which took a lot of time. The recruiter called to give the feedback which was a very nice gesture in my opinion. The feedback was basically I could have done it faster and that I took some hints to finish the exercise.