思路：① 算每辆车到达时间 = (target - position) / speed；② 按位置降序排序；③ 单调递增栈：仅当当前时间 栈顶时间时压栈（新车队），否则合并。栈长即为车队数。可优化为用变量代替栈。
Paranormal/Sci-Fi/Fantasy
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Meanwhile, if you're a keen-eared Bridgerton fan, Mashable's got every pop string cover in one spot. And make sure you read our review for Bridgerton Season 4, Part 2.
Cuban forces killed four exiles and wounded six others who sailed into its waters onboard a Florida-registered speedboat and opened fire on a Cuban patrol, the country’s government said, at a time of heightened tensions with the US.