$g$$n$$gcd(g^2-g,n)=1$$A=\{g^i|i \in \mathbb N\}$$B=\{x\equiv (n)|x\in A\}$$x\equiv (n)$$\{0,1,...,n-1\}$$x$$n$$0\le i\le g-1$$a_i=|[\frac{ni}{g},\frac{n(i+1)}{g})\cap B|$$g-1|\sum_{i=0}^{g-1}ia_i$$|$$|$$\frac{100}{6}$