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First solution in Clear category for Remove Brackets by juestr
from itertools import product
brackets = dict(zip('({[', ')}]'))
def remove_brackets(input):
def is_balanced(s):
stack = []
for b in s:
if b in '([{':
stack.append(b)
elif stack and b == brackets[stack[-1]]:
stack.pop()
else:
return False
return not stack
def delete(mask):
return ''.join(bracket for bracket, delete in zip(input, mask) if not delete)
masks = sorted(product((True, False), repeat=len(input)), key=sum)
return next(result for result in map(delete, masks) if is_balanced(result))
Oct. 31, 2019
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