fork download
copy 
  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 0.03s 9484KB
comments (?)
stdin
copy 
s=()
stdout
copy 
Standard output is empty
https://ideone.com/SKP7My
language:
Python 3 (python  3.9.5)
created:
7 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!