Last month I was asked this leet code (in different words but same problem) : https://leetcode.com/problems/minimum-window-substring/

I've never seen it before, so it took me a while to actually understand and even my code wasn't perfect.

However, my surprise was the fact that I was asked a Hard question with a reasonably low acceptance rate(~30%), during a Phone interview.
It really got me scared, and kept me thinking: If thats the expectation for a Phone interview, what should I expect for onsite ?

May be I was asked that because I have a bit of experience in my CV (~5 years) and a FANG as well.

Anyway, that was my phone interview.

Cyaa~