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#!/opt/local/bin/lua
--
-- See ../README.md
--
--
-- Run as: lua ch-2.lua < input-file
--
--
-- 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 io . lines () do
index = tonumber (index)
out = {}
hash = false
i = 0
while index > 0 do
hash = not hash
i = i + 1
if hash then
out [i] = "#"
index = index - 1
else
out [i] = index + 1
index = index - tostring (index + 1) : len ()
end
end
for j = i, 1, -1 do
io . write (out [j])
end
io . write ("\n")
end
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