Option 1: The system can update the cost of that specific shortcut in the base graph and quickly re-run the Dijkstra search (Step 2) on the abstract graph to find an alternative high-level path.
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2月25日下午，国家主席习近平在北京钓鱼台国宾馆会见来华进行正式访问的德国总理默茨。
What's under Diglett? The games never answer that question. The internet did.