0
1
mirror of https://git.sb/baoshuo/OI-codes.git synced 2024-11-05 23:58:47 +00:00
OI-codes/Luogu/problem/P1096/P1096.py
2021-01-02 15:30:52 +08:00

1 line
28 B
Python

print(2**(int(input())+1)-2)