346. Moving Average from Data Stream:

The Essence: The question tries to teach us:

• How to define a class.
• How to keep track of incoming numbers.

Details:

• It would be better for the problem-solver to learn how to create a class in the programming language of choice before starting the solution.
• We can keep track of incoming numbers using an Array or List. To make it more efficient, we can use a Deque as we just need to keep track of numbers by given size.