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Posted by LegendaryDan at 2006-10-27 20:45:47 on Problem 1475
In Reply To:问个问题…… Posted by:byron at 2006-10-27 20:24:30 
两次BFS的意思是说，要作两重BFS。
第一重，BFS箱子能不能到达一个位置，里面的第二重，BFS人能不能把箱子推到上一重箱子锁到达的位置。

你说的情况是一定可处理的：）
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