I was approached by a recruiter and asked to have a chat. After which, they promptly set up an interview without even asking if I wanted to go ahead. This felt quite aggressive.

I then had a remote coding interview with someone from the US office who didn't really bother telling me where they were located. He had a heavy South Indian accent that I could barely understand and seemed more interested in talking about himself and his job at Facebook than asking about my current role.

He was unable to explain the problem at hand well enough for me to understand. When I asked probing questions, he repeated himself like a broken record. For example, when he asked me about space complexity, I was working under the assumption that he wanted me to make a copy of the data structure. I work mostly with immutable data, so a copy is normal. He seemed surprised at my answer, and we went back and forth until I finally figured out he was expecting me to modify it in place.

I later found out his English language ability was quite poor. When I asked him some basic non-technical questions, he asked me what certain words meant. He also cut me off while I was trying to explain my solution to him and proceeded to give me the solution, which I thought was rather unfair. I guess at that point, he had already failed me.

Given a list of lists, where each node has a "bottom" and/or "right" child, and each bottom child has a bottom child, flatten it to return a list where all of them are right children.

For example:

A->B->C | A1 | A2

becomes

A->A1->A2->B->C etc.