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20 lines
595 B
Python
20 lines
595 B
Python
class Solution(object):
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def generateParenthesis(self, n):
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"""
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:type n: int
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:rtype: List[str]
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"""
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return self.createSets("(", 1, n - 1)
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def createSets(self, current, opened, yetToOpen):
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if opened == 0 and yetToOpen == 0:
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return [current]
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returnSet = []
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if yetToOpen > 0:
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returnSet += self.createSets(current + "(", opened + 1, yetToOpen - 1)
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if opened > 0:
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returnSet += self.createSets(current + ")", opened - 1, yetToOpen)
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return returnSet |