The whole process took me about a month.

At first, I sent my CV and cover letter. It is very important to send good cover letters.

Then, I was contacted by a recruiter within 2 days.

He told me about the interview process and gave me some materials for interview preparation.

The first interview I had was a Hangouts interview with an engineer.

I did well with my first task: at first, I made a bad and simple solution, and then I tried to improve its time and memory complexity. After that, I had a question about some class interface design.

And after that, I waited for about 3 weeks to get a negative decision because my first solution was too simple.

As I think, my interviewer just forgot about me and wrote something, so I didn't pass.

Find a metric in an arbitrary tree.