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  1. import re;from itertools import*;G=lambda f:{i for i in map(''.join,permutations("[()]*"*f,f))if re.fullmatch("(\**\[\**\]\**|\**\(\**\)\**)*|\**",i)}
  2. exec("print(G(int(input())));print();"*5)
Success #stdin #stdout 0.12s 9992KB
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{''}

{'*'}

{'[]', '**', '()'}

{'(*)', '*()', '[*]', '[]*', '*[]', '()*', '***'}

{'**()', '*[]*', '*()*', '[]()', '****', '(**)', '[]**', '[**]', '[][]', '**[]', '()**', '*(*)', '(*)*', '[*]*', '*[*]', '()()', '()[]'}
https://ideone.com/6QBiBM
language:
Python 3 (python  3.9.5)
created:
7 years ago
visibility:
public

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