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Range queries ask "what's inside this box?" But sometimes the question is "what's nearest to this location?" This is the nearest neighbor problem, and you don't know how big your search radius should be. The nearest point might be right next to you or far away.
。业内人士推荐WPS官方版本下载作为进阶阅读
那个童年的小巷，时间越久越像一个仿佛并不存在的乌托邦。如视频里所说：“你醒啦，你做了一场很长的梦。”
Advanced Color Picker (similar to Photoshop's)
* 时间复杂度：O(n log n)（主要来自排序），空间复杂度：O(n)