if (arr[j] arr[j + 1]) { // 升序：前面的大于后面的就交换
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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他在地上挣扎扭动，随后再也没有起身，袭击就此结束。
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The former Rangers and Everton sporting director’s strategic role at St George’s Park will span men’s and women’s football and he will report to Dan Ashworth, the chief football officer at the national football centre.。业内人士推荐safew官方下载作为进阶阅读