Question
Implement a request rate counter. Calls arrive with strictly increasing timestamps (milliseconds). For each call, after recording its timestamp, return the number of recorded calls whose timestamp falls within the inclusive window [t - window_ms, t]. Given the window size and a list of timestamps, return a list with the count after each call. Timestamps are non-decreasing; treat equal timestamps as valid separate calls.
rate_counter(window_ms: int, timestamps: list[int]) → list[int][3000,[1,100,3001,3002]]out[1,2,3,3]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.