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太有道理了 我知道自己错哪了。。。顶

Posted by 4053040 at 2010-02-24 10:42:57 on Problem 1101
In Reply To:其实BFS 不用记录路径 Posted by:qrmajia at 2009-03-27 15:51:03
>  我昨天就是用记录路径搞,WA了好久,不能一步一步的走,
> 因为走的折线比较少的而可能走得慢,所以如果走得快的
> 而走得弯弯扭扭的把那个格子前标记掉了,走得慢的但走
> 的折线少的那条路就无法走了,不标记的话又肯定是不行
> 的,所以不要每次走一步,改走射线,BFS的时候把某一格前
> 面空的全部入队,再下一步,这样的话,最快到目的地的也
> 肯定是拆线最少的,而且折线的数量刚好是步数加1就OK了!
> 
>  

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