Supports Frequent Updates: The architecture is designed to work with OsmAnd’s hourly map updates, allowing routing to adapt to fresh road information.
定方向:求「下一个」→ 倒序;求「上一个」→ 正序。
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sort palette by luminance
// 易错点1:边界处理 - 0辆车返回0,1辆车返回1(无需后续计算)