

"""simple docstring"""




from __future__ import annotations

__A     :    Tuple    =		{1: 1}
def    __SCREAMING_SNAKE_CASE						(						lowercase__      ):
					"""simple docstring"""
					if n in COLLATZ_SEQUENCE_LENGTHS:
										return COLLATZ_SEQUENCE_LENGTHS[n]
					A			=					n // 2 if n % 2 == 0 else 3 * n + 1
					A			=					collatz_sequence_length(lowercase__      ) + 1
					A			=					sequence_length
					return sequence_length
def    __SCREAMING_SNAKE_CASE						(						lowercase__ = 1_000_000      ):
					"""simple docstring"""
					A			=					max((collatz_sequence_length(lowercase__      ), i) for i in range(1			,							lowercase__      )      )
					return result[1]


if __name__ == "__main__":
	print(solution(int(input().strip())))






'''simple docstring'''




from scipy.constants import g





def      _UpperCAmelCase    (							_UpperCamelCase    :	float,   _UpperCamelCase    :	float   )	->      float:
    if mass < 0:
        # handling of negative values of mass
        raise ValueError('''The mass of a body cannot be negative'''   )
    if height < 0:
        # handling of negative values of height
        raise ValueError('''The height above the ground cannot be negative'''   )
    return mass * g * height


if __name__ == "__main__":
  from doctest import testmod

  testmod(name='potential_energy')






