Welcome to your interview.
The question is on your right: Optimize High Time Complexity Algorithms. 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.
How do you optimize an algorithm that has high time complexity when processing large datasets?