Question
A server-room dashboard scans hourly temperature readings for the coolest stretch of the day. Given the readings temps (non-empty, may include negatives) and a stretch length k (1 <= k <= number of readings), return the minimum possible sum of k consecutive readings. Keep a running window sum rather than recomputing each stretch. Example: temps = [30, 25, 27, 31, 24, 26], k = 2 gives 50 (24 + 26).
coolest_stretch_sum(temps: list[int], k: int) → int[[30,25,27,31,24,26],2]out50State 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.