def F(n: int) -> int:
    """
    Function that is a python version of the mathematical
    function
          {0 -            if n = 0;
    F_n = {1 -            if n = 1;
          {F_n-1 + F_n-2  if n > 1.

    :param n: The term of the sequance you want
    :returns: The n-th term of the fibonacci sequance
    """
    if n == 0:
        return 0
    elif n == 1:
        return 1
    else:
        return F(n - 1) + F(n - 2)