Now that we can build the tree, let's use it to search. Finding a specific point means starting at the root and asking: which child quadrant contains this coordinate? Then you recurse into that child and ask again. Each level of the tree cuts the search space by roughly three-quarters.
The Taliban government does not allow easy access to foreign journalists, and verifying information, particularly from border areas, is even more challenging.，详情可参考同城约会
* @param n 数组长度，详情可参考谷歌浏览器【最新下载地址】
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