The algorithm also visits children in order of distance to the query point. This means it checks the most promising quadrants first, which tends to find a good candidate early and enables aggressive pruning of the remaining quadrants. Without this ordering, the algorithm would still produce the correct result, but it would prune fewer nodes.
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。
，这一点在搜狗输入法下载中也有详细论述
无私者，可置以为政。政绩观，是世界观、人生观、价值观在为政实践中的集中体现。
On the first loop iteration, there is no backing store for tasks, so