There’s a full table of contents in the description of the video below.
Equal (1): Everything in this space must be equal to 1. The answer is 1-1, placed vertically.
，更多细节参见Line官方版本下载
利用者ピーク時の4分の1に激減 でも元気なスキー場も なぜ？
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.