If the A* calculation for a shortcut (in Step 3) finds it's now impassable, or if its actual detailed cost is significantly different (e.g., 20%) from the pre-calculated shortcut value:
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// 优化：如果本轮没交换，说明已经有序
63-летняя Деми Мур вышла в свет с неожиданной стрижкой17:54
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