摘要:
Problem Description RXD is a good mathematician.One day he wants to calculate: ∑i=1nkμ2(i)×⌊nki−−−√⌋ output the answer module 109+7.1≤n,k≤1018 μ(n)=1( 阅读全文
posted @ 2017-08-02 10:14
Annetree
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