#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import sys

if len(sys.argv) == 1 or not sys.argv[1].isnumeric() or int(sys.argv[1]) <= 0:
	msg = """\
Usage: {:s} nbr_int
    nbr_int: Un nombre entier supérieur à 0""".format(sys.argv[0])
	print(msg)
	sys.exit(1)

a,b = 0,1

while b < int(sys.argv[1]):
	print(b)
	a,b = b,a+b

print("b/a = {:1.15f}".format(b/a))

sys.exit(0)