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Re:请教一下为什么是求n以内完全平方数个数？谢谢

Posted by wywcgs at 2006-10-02 12:39:03 on Problem 1218
In Reply To:请教一下为什么是求n以内完全平方数个数？谢谢 Posted by:zmcz at 2006-10-02 10:03:41 
只有完全平方数才有奇数个因数
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