let p = head; // 遍历链表的指针
[qjoly@fedora]~% cowsay
，更多细节参见91视频
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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나경원 “당이 제대로 싸우지 못하는 현실 참담”