您可能没考虑到$2^n=2$的情况
by qqqqq111 @ 2021-05-30 10:13:42
应该加个特判就过了
by qqqqq111 @ 2021-05-30 10:14:36
@[讨厌的狗](/user/384746)
by qqqqq111 @ 2021-05-30 10:48:24
@[qqqqq111](/user/313137) 大感谢！！！！！可以了！！！！！
by JRE3 @ 2021-05-30 15:35:30