【HDU6134】Battlestation Operational(莫比乌斯反演)

记录一个菜逼的成长。。php 2017 Multi-University Training Contest - Team 8 题目连接web 题目大意: 让你求svg f(n)=∑i=1n∑j=1n⌈ij⌉[(i,j)=1] 理解了q巨的解法后，对反演理解了点。。ui 如下是q巨说的解法: 记 g(i)=∑nj=1⌈ij⌉ , h(i)=∑nj=1⌈ij⌉[(i,j)=1] 那么 g(i)=∑d|

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