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:
SelectWhat's included
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而早已去世的爷爷奶奶却不同。小时候，奶奶睡前给我讲民俗故事，讲到《半夜鸡叫》时学周扒皮“咯咯咯”地笑，我也跟着笑。她用箬叶包粽子，用玉兰花泡酒，一遍遍做我爱吃的番茄炒蛋，直到那道菜让我生出厌倦。爷爷虽然吝啬，也会在午睡前给我留下几块零花钱，在春节时给我买烟花和零食。