#!/usr/bin/env python
# -*- coding: latin-1 -*-
import calcule
i = True

while i:
	usernumber = int(input('Introduce un número >>'))
	if usernumber <= 0:
		print ('Debe ser un numero más grande o igual a 1')
	elif usernumber > 65535:
		print ('Debe ser un numero mas pequeño que 65536')
	else:
		print (calcule.func(usernumber))

#!/usr/bin/env python
# -*- coding: latin-1 -*-
def func(usernumber):
	r=[]
	re=[]
	i=True

	while i:
		vr= int(usernumber // 16.)
		vre=(usernumber-(vr*16))
		usernumber=vr
		r.append(vr)
		re.append(vre)
		if vr >= 16:
			vr=0
			vre=0
		else:
			i= False
	last = len(r)
	k = re[0]
	re.reverse()
	x=re[0]

	f = len(re)
	y=0
	while y <= f-1:
		if re[y]==10: 
			re[y]='A'
		elif re[y]==11:
			re[y]='B'
		elif re[y]==12:
			re[y]='C'
		elif re[y]==13:
			re[y]='D'
		elif re[y]==14:
			re[y]='E'
		elif re[y]==15:
			re[y]='F'
		y = y + 1

		last = len(r)
	if last ==1:
	    last = 0
	    if r[last] ==10:
		r[last]='A'
	    elif r[last] ==11:
		r[last]='B'
	    elif r[last] ==12:
		r[last]='C'
	    elif r[last] ==13:
		r[last]='D'
	    elif r[last] ==14:
		r[last]='E'
	    elif r[last] ==15:
		r[last]='F'
	else:
	    last = last -1
	
	if r[last] ==10:
		r[last]='A'
	elif r[last] ==11:
		r[last]='B'
	elif r[last] ==12:
		r[last]='C'
	elif r[last] ==13:
		r[last]='D'
	elif r[last] ==14:
		r[last]='E'
	elif r[last] ==15:
		r[last]='F'
	string = ''
	e = 0
	while e < f:
		string = string + str(re[e])
		e = e + 1
	last= last-1
	result = (str(r[last])+(string))

	return result