Welcome to your interview.
The question is on your right: Real-Time Optimization and Complexity. 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.
What is the time complexity of your proposed solution, and how could it be optimized for real-time control?