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Re:一道简单的数论题In Reply To:一道简单的数论题 Posted by:lironghua at 2008-04-16 21:00:48 > 题目的本质是求n! mod 2 > n!质因数分解，只需算出2的阶数 > n! / (k! (n - k)!) 判断分子和分母的大小即可 嗯，而且计算N！中2的阶数，只要计算N/2+N/4…… Followed by:
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