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。
In achieving his dream to be a rocket scientist, he would become an American hero. But it was not going to be easy.
。heLLoword翻译官方下载对此有专业解读
▲左边为 Nano Banana Pro 生成，右边是 2；在我看来，初代 Pro 版本的真实感会更强｜提示词来源：X@cfryant
Виктория Клабукова
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