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  1. BRACES = { '(': ')', '[': ']', '{': '}' }
  2.  
  3. def group_check(s):
  4.     stack = []
  5.     for b in s:
  6.         c = BRACES.get(b)
  7.         if c:
  8.             stack.append(c)
  9.         elif not stack or stack.pop() != b:
  10.             return False
  11.     return not stack
  12.  
  13.  
  14.  
  15. print(group_check("()"))
  16. print(group_check("({"))
  17. print(group_check("({}{}[])"))
Success #stdin #stdout 0.02s 9984KB
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https://ideone.com/kDisgI
language:
Python 3 (python  3.9.5)
created:
9 years ago
visibility:
public

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