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Re:F(N)=,∑gcd(i, N) 1<=i <=N是积性函数吗，我假定这个AC了，但我没严格证明，谁来证明一下?In Reply To:Re:F(N)=,∑gcd(i, N) 1<=i <=N是积性函数吗，我假定这个AC了，但我没严格证明，谁来证明一下? Posted by:gsyagsy at 2008-12-12 23:31:23 > 我的证明，嘿嘿～～ > http://hi.baidu.com/5l2_/blog/item/3c0d10380e4d72c4d5622523.html 能不这么牛吗？小生想哭 Followed by: Post your reply here: |
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