Your question is Sliding Window HackerRank Coding. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Solve a sliding window based coding HackerRank question.
Implement the required sliding-window algorithm for a sequence and fixed window size. Clarify assumptions about invalid inputs, preserve the expected HackerRank function signature, and explain the time and space complexity. A strong solution should avoid recomputing every window from scratch and should be suitable for use when the sequence is large.