@[kouki](/user/302776) he了它
by little_cindy @ 2021-07-19 11:43:28
？不懂
by kouki @ 2021-07-19 11:45:11
@[kouki](/user/302776) 加油ヾ(◍°∇°◍)ﾉﾞ
by DLDZD @ 2021-07-22 16:20:45
@[大佬双重弟](/user/508593) ？？
by kouki @ 2021-07-22 19:35:56
鼓励你
by DLDZD @ 2021-07-22 19:40:59
print(2**(int(input())+1)-2)
反正看了题解，这个应该懂。
by LiuQuanHui @ 2022-01-09 11:01:50
就1行
by LiuQuanHui @ 2022-01-09 11:02:32