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The interviewer did not care about explaining the code, focusing on optimization to the extreme. The question itself was easy to solve, but optimization was hard. I discussed the optimization strategies with the interviewer, and he helped me figure o

The interview asked an Algorithm. Better prepare divide & conquer, greedy, and dynamic programming. It's better to prepare by doing some similar questions. It was also based on a real-life scenario, not merely an algorithm description.

There are four rounds in total. The first two rounds are technical, where you have to code and answer follow-ups. Then there are two rounds of hiring manager chat, which I didn't get to.