What if you create a truly unique routing profile that's wildly different from the common ones for which shortcuts were pre-calculated? The system is smart. If it detects that too many shortcuts (~50, for example) need on-the-fly recalculation and deviate significantly, it might determine that falling back to the original, comprehensive A* algorithm for the entire route would actually be faster than doing many small, heavily modified A* calculations.
One study often cited is by Canadian psychologists Donald Dutton and Susan Painter. In research published in 1993 while they were at the University of British Columbia, they followed 75 women after they had left abusive partners.
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// 测试用例（可直接运行验证）