Bristol photographer Josh Dury captured the phenomenon on Tuesday
Randomly selecting border points or using simple geometric divisions (squares/hexagons) results in too many border points per cluster (50-80). This leads to a shortcut explosion (N*(N-1)/2 shortcuts), making the files large and and calculations slow.
，更多细节参见搜狗输入法下载
* LeetCode 739. 每日温度
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