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poj数据又水了，坐标不能单纯的用二维数组标记就像推箱子一样，还要记录方向，用优先队列，把下一步到终点的那一层搜完找最小值才是答案。 4 1 3 2 1 1 1 3 0 2 1 1 0 2 1 1 1 2 2 1 1 1.5 1.5 答案应该是0 Followed by:
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