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  1. def is_valid(s):
  2.     stack = []
  3.     brackets = {')': '(', '}': '{', ']': '['}
  4.     for char in s:
  5.         if char in brackets.values():
  6.             stack.append(char)
  7.         elif char in brackets.keys():
  8.             if not stack or stack.pop()!= brackets[char]:
  9.                 return False
  10.     return not stack
  11.  
Success #stdin #stdout 0.04s 9580KB
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https://ideone.com/bcooYG
language:
Python 3 (python  3.9.5)
created:
7 days ago
visibility:
public

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