# L-12 MCS 260 Mon 24 Sep 2007  binary expansion
#
# A break only effects one loop.
#
print 'computing the binary expansion'
while True:
   n = input('Give a number (< 0 to exit) : ')
   if n < 0: break
   while True:
      (n,r) = divmod(n,2)
      print r
      if n == 0: break