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!
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Maggie 姐每天开工前都要在湾仔道一家发廊弄头发（图：南方人物周刊记者 方迎忠）