Welcome to your interview.
The question is on your right: Stock Max Profit Single Pass. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
Solve the Best Time to Buy and Sell Stock problem and optimize for time complexity using single-pass logic.