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class Solution:
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    def makeLargestSpecial(self, s: str) -> str:
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        l = 0
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        balance = 0
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        sublist = []
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        for r in range(len(s)):
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            balance += 1 if s[r] == "1" else -1
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            if balance == 0:
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                sublist.append("1" + self.makeLargestSpecial(s[l + 1 : r]) + "0")
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                l = r + 1
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        sublist.sort(reverse=True)
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        return "".join(sublist)