For example, a 500km route might be broken down into ~100 such shortcuts. If each A* shortcut calculation explores 100-1000 detailed road segments, the total detailed segments visited by A* might be around 10,000-50,000. Compare this to the 1,000,000+ segments the old A* might have needed for the entire route!
// 易错点1：必须倒序遍历（正序无法正确缓存右侧的更大值），更多细节参见heLLoword翻译官方下载
，更多细节参见safew官方下载
图源：Sea Expandary官网
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