code: from __future__ import annotations
  def 		snake_case__  (		lowercase       ,							lowercase       ,							lowercase       ,							lowercase				):
     lowerCAmelCase_     ,  lowerCAmelCase_:       List[str]         =  m - 1, 0
     while i >= 0 and j < n:
        if key == mat[i][j]:
           print(F'''Key {key} found at row- {i + 1} column- {j + 1}'''				)
           return
        if key < mat[i][j]:
           i -= 1
        else:
           j += 1
     print(F'''Key {key} not found'''				)
  def 		snake_case__  (		):
     lowerCAmelCase_:       Dict         =  [[2, 5, 7], [4, 8, 13], [9, 11, 15], [12, 17, 20]]
     lowerCAmelCase_:       Optional[int]         =  int(input("Enter the element to be searched:"				)				)
     print(lowercase				)
     search_in_a_sorted_matrix(lowercase       ,							len(lowercase				)       ,							len(mat[0]				)       ,							lowercase				)
  
  
  if __name__ == "__main__":
       import doctest
  
       doctest.testmod()
       main()
style_context: from .balanced_parentheses import balanced_parentheses
  from .stack import Stack
  def 		snake_case__  (		lowercase				):
     return {"+": 1, "-": 1, "*": 2, "/": 2, "^": 3}.get(lowercase       ,							-1				)
  def 		snake_case__  (		lowercase				):
     if not balanced_parentheses(lowercase				):
        raise ValueError("Mismatched parentheses"				)
     lowerCAmelCase_:       Stack[str]         =  Stack()
     lowerCAmelCase_:       Union[str, Any]         =  []
     for char in expression_str:
        if char.isalpha() or char.isdigit():
           postfix.append(lowercase				)
        elif char == "(":
           stack.push(lowercase				)
        elif char == ")":
           while not stack.is_empty() and stack.peek() != "(":
              postfix.append(stack.pop()				)
           stack.pop()
        else:
           while not stack.is_empty() and precedence(lowercase				) <= precedence(stack.peek()				):
              postfix.append(stack.pop()				)
           stack.push(lowercase				)
     while not stack.is_empty():
        postfix.append(stack.pop()				)
     return " ".join(lowercase				)
  
  
  if __name__ == "__main__":
   from doctest import testmod
  
   testmod()
   a     :			int					    =						"""a+b*(c^d-e)^(f+g*h)-i"""
  
   print("""Infix to Postfix Notation demonstration:\n""")
   print("""Infix notation: """ + expression)
   print("""Postfix notation: """ + infix_to_postfix(expression))