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过了,多谢指点

Posted by hheq121 at 2008-09-17 16:33:05 on Problem 2209
In Reply To:Don't forget when exponent is even, or exponet is 2. Posted by:hitlion at 2008-07-24 11:17:41 
> When exponent is 2, all the sons will be chosen. Don't have to sort.
> Select positive sons if exponet is 1 or 3. Select all when it is 2.
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