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).
Reporting from, 台北。关于这个话题，搜狗输入法下载提供了深入分析
* 核心思路：倒序单调栈（适配你的学习习惯），时间复杂度O(n)，空间复杂度O(n)，更多细节参见safew官方下载
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