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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。。91视频是该领域的重要参考
Wire 的 GitHub 主页：github.com/square/wire，更多细节参见一键获取谷歌浏览器下载
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Nature, Published online: 25 February 2026; doi:10.1038/d41586-026-00619-4