Number (6): Everything in this space must add up to 6. The answer is 6-3, placed vertically; 3-2, placed vertically.
Before you share your location, you'll get to choose how long you want to share -- one hour, today only (ending at midnight), until you turn it off, or for a custom time period less than 24 hours. You can also stop sharing at any time.
，更多细节参见safew官方版本下载
'Get the camera'，更多细节参见同城约会
* 时间复杂度：O(n log n)（主要来自排序），空间复杂度：O(n)。关于这个话题，服务器推荐提供了深入分析