Created
December 16, 2018 11:19
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Dailyprogrammer #367
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| # https://www.reddit.com/r/dailyprogrammer/comments/9cvo0f | |
| defmodule Subfactorials do | |
| def subfactorial(0), do: 1 | |
| def subfactorial(1), do: 0 | |
| def subfactorial(n), do: (n-1)*(subfactorial(n-1)+subfactorial(n-2)) | |
| end | |
| IO.stream(:stdio, :line)|>Enum.each( | |
| &(&1|>String.trim|>String.to_integer|>Subfactorials.subfactorial|>IO.puts) | |
| ) |
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