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。
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居民选举委员会成员或者其近亲属被提名为居民委员会成员候选人的，应当退出居民选举委员会。
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Activision Blizzard UK Ltd said the ad had been reviewed by Clearcast, which provides pre-clearance of TV advertising, and had been approved with an "ex-kids" timing restriction.