@[Inf_Voltage](/user/119261) p不是质数需要ex一下子
by YLWang @ 2020-08-03 16:08:49
@[Inf_Voltage](/user/119261) 欧拉定理的前提是什么？
by Prean @ 2020-08-03 16:09:00
@[YLWang](/user/55078) 明白了本题中a和n不互质
by 7KByte @ 2020-08-03 16:09:27