# Exercise 2A
# Rendering integers to arbitrary bases.
#
# Author: David Watt.

def render (i, b):
    "Return the rendering of i as a signed integer to base b."
    sign = ('+' if i >= 0 else '-')
    digits = chr(i%b + ord('0'))
    mag = abs(i) // b
    while mag > 0:
        digit = chr(mag%b + ord('0'))
        digits = digit + digits
        mag = mag // b
    return sign + digits

base = int(raw_input('Base? '))
while base != 0:
    integer = int(raw_input('Integer? '))
    print 'Rendering is', render(integer, base)
    base = int(raw_input('Base? '))