I was thrown a Leetcode hard question in the last round of a long, tiring on-site. I gave a solution which met the optimal time/space complexity, but the interviewer was wrong with his analysis. I politely explained everything, and he agreed that it was a valid solution. This took some time, so there wasn't much time left.

"OK, let's code."

When I was about to write the first line...

"You know what? I think this approach is too easy for you to code. Can you use a different approach so that we know you can write tricky code?" And a winning smile.

Call it a stress test or whatever. Hire a robot.

whiteboard questions