Code Room
CodingMediumcod-g681
Subject Stream processingLevel Mid–Senior~25 minCommon in Distributed systems · Algorithms & data structures interviewsIndustries Software development, Technology

Question

Compute a sliding-window maximum over a stream. Given a list of integers and a window size w, return a list where the i-th entry is the maximum of the window ending at index i, using min(i+1, w) elements (the window grows until it reaches size w). Return the list of per-position maxima. Assume w >= 1 and the input may be empty.

Implement
sliding_max(nums: list[int], w: int) → list[int]
Examples
in[[1,3,2,5,4],3]out[1,3,3,5,5]
What a strong answer looks like

State your approach and its time/space complexity out loud before you optimize. Handle the edge cases (empty input, duplicates, overflow), and say why you chose this over the brute force. Green tests are the floor, not the grade.

Vibe coding: describe the solution in plain language (or narrate it) and the coach grades your approach. Generating runnable code from your description is coming next.

Run or narrate your approach, then ask the coach.