不用双层循环吧，单层就够
by wwqwq @ 2023-07-12 21:30:29
i从2枚举至sqrt(n)
by wwqwq @ 2023-07-12 21:30:57
@[zhonghongye](/user/783665)
by wwqwq @ 2023-07-12 21:31:08