直到2012年習近平上台，張又俠出任解放軍總裝備部部長，兩人才真正意義上共事。
适用：数据均匀分布，如[0,1)之间的浮点数
。业内人士推荐51吃瓜作为进阶阅读
A quadtree does the same thing for two-dimensional space. It takes a rectangular region and divides it into four equal quadrants: northwest, northeast, southwest, southeast. If a quadrant has too many points in it, it subdivides again and again. Each subdivision creates smaller and smaller cells where points are densely packed.
swap(&arr[low], &arr[j]);
В России ответили на имитирующие высадку на Украине учения НАТО18:04