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#!/opt/local/bin/python
#
# See ../README.md
#
#
# Run as python ch-2.py < input-file
#
import fileinput
#
# Working from the end of the required string backwards, we alternate
# placing a hash, and placing a number. We place them in an array @out,
# and at the end, print out said array in reverse order.
#
for index in fileinput . input ():
index = int (index)
out = []
hash = 0
while index > 0:
hash = not hash
if hash:
out . append ("#")
index = index - 1
else:
out . append (str (index + 1))
index = index - len (str (index + 1))
out . reverse ()
print ("" . join (out))
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