comefrom: <doocs>0069.Sqrt(x)_1.py
code: def mySqrt( x: int) -> int:
      left, right = 0, x
      while left < right:
          mid = (left + right + 1) >> 1
          if mid <= x // mid:
              left = mid
          else:
              right = mid - 1
      return left
masked: def sample_funcname ( var_0 : int ) -> int :
      var_1 , var_2 = 0 , var_0
      while var_1 < var_2 :
          var_3 = ( var_1 + var_2 + 1 ) >> 1
          if var_3 <= var_0 // var_3 :
              var_1 = var_3
          else :
              var_2 = var_3 - 1
      return var_1
  