Detecting fires caused by lithium-ion batteries is challenging
Chickenpox is a highly contagious disease caused by the varicella zoster virus (VZV).
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// Use it directly
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。