'''simple docstring'''
from __future__ import annotations

a=	[2, 1, 4, 5, 6, 0, 8, 9, 1, 2, 0, 6, 4, 2, 0, 6, 5, 3, 2, 7]






class       __lowercase		:







     """simple docstring"""






     def __init__(		self  ,      _lowerCamelCase     ):
         __UpperCamelCase						:						Any		     =	-1
         __UpperCamelCase						:						List[str]		     =	-1
         __UpperCamelCase						:						Union[str, Any]		     =	[-1] * length
         __UpperCamelCase						:						Optional[int]		     =	None
         __UpperCamelCase						:						int		     =	None







     def __repr__(		self     ):
         return f"""Node(min_value={self.minn} max_value={self.maxx})"""







def 			_UpperCamelCase			(  _a						:						List[str]      ):




    """simple docstring"""



    __UpperCamelCase						:						List[Any]		     =	Node(len(A__      )      )
    __UpperCamelCase     ,       __UpperCamelCase						:						Optional[int]		     =	min(A__      ), max(A__      )
    # Leaf node case where the node contains only one unique value
    if root.minn == root.maxx:
        return root
    __UpperCamelCase						:						int		     =	(root.minn + root.maxx) // 2

    __UpperCamelCase						:						List[str]		     =	[]
    __UpperCamelCase						:						Optional[Any]		     =	[]

    for index, num in enumerate(A__      ):
        if num <= pivot:
            left_arr.append(A__      )
        else:
            right_arr.append(A__      )
        __UpperCamelCase						:						int		     =	len(A__      )
    __UpperCamelCase						:						List[str]		     =	build_tree(A__      )
    __UpperCamelCase						:						List[str]		     =	build_tree(A__      )
    return root







def 			_UpperCamelCase			(  _a						:						Tuple					,  _a						:						Optional[Any]					,  _a						:						Dict      ):




    """simple docstring"""



    if index < 0 or node is None:
        return 0
    # Leaf node cases
    if node.minn == node.maxx:
        return index + 1 if node.minn == num else 0
    __UpperCamelCase						:						Dict		     =	(node.minn + node.maxx) // 2
    if num <= pivot:
        # go the left subtree and map index to the left subtree
        return rank_till_index(node.left					,  A__					,  node.map_left[index] - 1      )
    else:
        # go to the right subtree and map index to the right subtree
        return rank_till_index(node.right					,  A__					,  index - node.map_left[index]      )







def 			_UpperCamelCase			(  _a						:						str					,  _a						:						Union[str, Any]					,  _a						:						Union[str, Any]					,  _a						:						Optional[Any]      ):




    """simple docstring"""



    if start > end:
        return 0
    __UpperCamelCase						:						Union[str, Any]		     =	rank_till_index(A__					,  A__					,  A__      )
    __UpperCamelCase						:						Any		     =	rank_till_index(A__					,  A__					,  start - 1      )
    return rank_till_end - rank_before_start







def 			_UpperCamelCase			(  _a						:						Any					,  _a						:						Any					,  _a						:						List[str]					,  _a						:						Optional[int]      ):




    """simple docstring"""



    if index > (end - start) or start > end or node is None:
        return -1
    # Leaf node case
    if node.minn == node.maxx:
        return node.minn
    # Number of elements in the left subtree in interval [start, end]
    __UpperCamelCase						:						Optional[Any]		     =	node.map_left[end] - (
        node.map_left[start - 1] if start else 0
    )
    if num_elements_in_left_tree > index:
        return quantile(
            node.left					,  A__					,  (node.map_left[start - 1] if start else 0)					,  node.map_left[end] - 1					,  )
    else:
        return quantile(
            node.right					,  index - num_elements_in_left_tree					,  start - (node.map_left[start - 1] if start else 0)					,  end - node.map_left[end]					,  )







def 			_UpperCamelCase			(  _a						:						str					,  _a						:						Union[str, Any]					,  _a						:						Optional[Any]					,  _a						:						List[Any]					,  _a						:						List[Any]      ):




    """simple docstring"""



    if (
        start > end
        or node is None
        or start_num > end_num
        or node.minn > end_num
        or node.maxx < start_num
    ):
        return 0
    if start_num <= node.minn and node.maxx <= end_num:
        return end - start + 1
    __UpperCamelCase						:						str		     =	range_counting(
        node.left					,  (node.map_left[start - 1] if start else 0)					,  node.map_left[end] - 1					,  A__					,  A__					,  )
    __UpperCamelCase						:						Tuple		     =	range_counting(
        node.right					,  start - (node.map_left[start - 1] if start else 0)					,  end - node.map_left[end]					,  A__					,  A__					,  )
    return left + right


if __name__ == "__main__":
  import doctest

  doctest.testmod()





_A       =					{
    "+": lambda x, y: x + y,
    "-": lambda x, y: x - y,
    "*": lambda x, y: x * y,
    "/": lambda x, y: x / y,
}



def 		lowercase_     (  A__						)				->				Union[str, Any]:
    """simple docstring"""

    return c.isdigit()



def 		lowercase_     (  A__						)				->				int:
    """simple docstring"""

    snake_case						=   []

    # iterate over the string in reverse order
    for c in expression.split()[::-1]:
        # push operand to stack
        if is_operand(A__						):
            stack.append(int(A__						)						)

        else:
            # pop values from stack can calculate the result
            # push the result onto the stack again
            snake_case						=   stack.pop()
            snake_case						=   stack.pop()
            stack.append(calc[c](A__					,						A__						)						)

    return stack.pop()


# Driver code
if __name__ == "__main__":
   _A       =					"+ 9 * 2 6"
   print(evaluate(test_expression))

   _A       =					"/ * 10 2 + 4 1 "
   print(evaluate(test_expression))

