comefrom: <doocs>0287.Find the Duplicate Number_1.py
code: def findDuplicate( nums: List[int]) -> int:
      left, right = 1, len(nums) - 1
      while left < right:
          mid = (left + right) >> 1
          cnt = sum(v <= mid for v in nums)
          if cnt > mid:
              right = mid
          else:
              left = mid + 1
      return left
masked: def sample_funcname ( var_0 : List [ int ] ) -> int :
      var_4 , var_6 = 1 , len ( var_0 ) - 1
      while var_4 < var_6 :
          var_7 = ( var_4 + var_6 ) >> 1
          var_10 = sum ( var_8 <= var_7 for var_8 in var_0 )
          if var_10 > var_7 :
              var_6 = var_7
          else :
              var_4 = var_7 + 1
      return var_4
  