Question
Cars travel toward a destination at position 'target' on a single-lane road that does not allow passing. Car i starts at position[i] (0 <= position[i] < target) with constant speed[i]. A faster car that catches a slower one ahead slows to that car's speed and they travel as one 'fleet' (they arrive together); a car that catches a fleet at the target also joins it. All start positions are distinct. Return the number of distinct fleets that arrive at the target.
car_fleet(target: int, position: list[int], speed: list[int]) → int[12,[10,8,0,5,3],[2,4,1,1,3]]out3State 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.