Now, OsmAnd performs another Dijkstra search, but this time on the much smaller "base graph." This graph consists only of the border points and the pre-calculated shortcut values between them.
It has a risk of being used for illicit activities，详情可参考旺商聊官方下载
，这一点在体育直播中也有详细论述
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3. 步长逐渐减小，最后步长为1时就是普通插入排序，详情可参考体育直播
deriving (Show, Eq)