comefrom: <doocs>1980.Find Unique Binary String_1.py
code: def findDifferentBinaryString( nums: List[str]) -> str:
      s = set(num.count("1") for num in nums)
      n = len(nums)
      for i in range(n + 1):
          if i not in s:
              return "1" * i + "0" * (n - i)
      return ""
masked: def sample_funcname ( var_0 : List [ str ] ) -> str :
      var_7 = set ( var_4.count ( "1" ) for var_4 in var_0 )
      var_9 = len ( var_0 )
      for var_12 in range ( var_9 + 1 ) :
          if var_12 not in var_7 :
              return "1" * var_12 + "0" * ( var_9 - var_12 )
      return ""
  