What is the result of ∑x∈(Z/nZ)∗x(modn)\sum_{x \in (\mathbb{Z}/n\mathbb{Z})^*} x \pmod n∑x∈(Z/nZ)∗x(modn) for n>2n > 2n>2?
000
n/2n/2n/2
111
−1-1−1