
import math



def 						lowercase_      (       )							->							None:
    """simple docstring"""

    snake_case								= input("Enter message: "		)
    snake_case								= int(input(F'Enter key [2-{len(A__		) - 1}]: '		)		)
    snake_case								= input("Encryption/Decryption [e/d]: "		)

    if mode.lower().startswith("e"		):
        snake_case								= encrypt_message(A__			,		A__		)
    elif mode.lower().startswith("d"		):
        snake_case								= decrypt_message(A__			,		A__		)

    # Append pipe symbol (vertical bar) to identify spaces at the end.
    print(F'Output:\n{text + "|"}'		)



def 						lowercase_      (       A__			,		A__		)							->							str:
    """simple docstring"""

    snake_case								= [""] * key
    for col in range(A__		):
        snake_case								= col
        while pointer < len(A__		):
            cipher_text[col] += message[pointer]
            pointer += key
    return "".join(A__		)



def 						lowercase_      (       A__			,		A__		)							->							str:
    """simple docstring"""

    snake_case								= math.ceil(len(A__		) / key		)
    snake_case								= key
    snake_case								= (num_cols * num_rows) - len(A__		)
    snake_case								= [""] * num_cols
    snake_case								= 0
    snake_case								= 0

    for symbol in message:
        plain_text[col] += symbol
        col += 1

        if (
            (col == num_cols)
            or (col == num_cols - 1)
            and (row >= num_rows - num_shaded_boxes)
        ):
            snake_case								= 0
            row += 1

    return "".join(A__		)


if __name__ == "__main__":
   import doctest

   doctest.testmod()
   main()



from __future__ import annotations



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

    if len(A__		) == 0:
        raise ValueError("find_max() arg is an empty sequence"		)
    if (
        left >= len(A__		)
        or left < -len(A__		)
        or right >= len(A__		)
        or right < -len(A__		)
    ):
        raise IndexError("list index out of range"		)
    if left == right:
        return nums[left]
    snake_case								= (left + right) >> 1  # the middle
    snake_case								= find_max(A__			,		A__			,		A__		)  # find max in range[left, mid]
    snake_case								= find_max(A__			,		mid + 1			,		A__		)  # find max in range[mid + 1, right]

    return left_max if left_max >= right_max else right_max


if __name__ == "__main__":
   import doctest

   doctest.testmod(verbose=True)

