Yandex interview questions

1 algorithm problem, where you need to place calls time consecutevily for HR, so that calls do not override each other. The interviewer asked my thought process first, and did not give me access to start coding before my verbal solution to the problem wouldn't be right.

The first task was to create a presentation for the Yandex maps in order to proceed to the interview. This took quite a bit of time and preparation, but unfortunately, I was not offered a chance to move on to the next stage, and they did not even respond to my email explaining why I was unable to proceed.