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嗯，是的，关键当你的程序输出的是2或者3的话（输入为1），也会AC的，我试过好几次了！！！

Posted by LoyaltyJi at 2005-12-26 21:42:08 on Problem 2551
In Reply To:输入1， 结果就是1啊 Posted by:wrong123 at 2005-12-26 14:09:22 
所以我就怀疑测试数据里面没有1这种情况！！！
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