comefrom: <qiyuangong>268_Missing_Number_3.py
code: def missingNumber( nums):
      nums.sort()
      left, right = 0, len(nums) - 1
      while left <= right:
          mid = (left + right) / 2
          if nums[mid] <= mid:
              left = mid + 1
          else:
              right = mid - 1
      return left
masked: def sample_funcname ( var_0 ) :
      var_0.sort ( )
      var_3 , var_6 = 0 , len ( var_0 ) - 1
      while var_3 <= var_6 :
          var_8 = ( var_3 + var_6 ) / 2
          if var_0 [ var_8 ] <= var_8 :
              var_3 = var_8 + 1
          else :
              var_6 = var_8 - 1
      return var_3
  