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An easy problem Time Limit : 6000/3000ms (Java/Other)   Memory Limit : 32768/32768K (Java/Other)Problem DescriptionWhen Teddy was a child , he was always thinking about some simple math problems

Ignatius and the Princess III Time Limit : 2000/1000ms (Java/Other)   Memory Limit : 65536/32768K (Java/Other)Problem Description"Well, it seems the first problem is too easy. I will let you kno

RXD and mathProblem DescriptionRXD is a good mathematician.One day he wants to calculate:∑i=1nkμ2(i)×⌊nki−−−√⌋output the answer module 109+7.1≤n,k≤1018μ(n)=1(n=1)μ(n)=(−1