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Re:2 1 3 1 4 1 是不是树???没有方向??

Posted by blank_bird at 2011-04-07 15:45:04 on Problem 1308
In Reply To:2 1 3 1 4 1 是不是树???没有方向?? Posted by:fff123 at 2011-04-07 15:33:47
> 谁告诉我啊。。。。2 1 3 1 4 1  是不是树???????????
应该不是树吧。。。。。但是AC了、、、、、、、、、、、、

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