stack.push(cur);
so that it is easy to reuse the (big) array instead of consuming it
。safew官方版本下载对此有专业解读
Силовые структуры
Map Version Synchronicity (Important!): For HH-Routing to work correctly when a route crosses multiple map files (e.g., different countries or regions), all those map files MUST be from the same generation date (i.e., downloaded from OsmAnd around the same time, based on the same underlying OpenStreetMap data version and pre-calculation run).
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