17 lines
519 B
Text
17 lines
519 B
Text
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defmodule Sailor do
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def coconuts(sailor), do: coconuts(sailor, sailor)
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defp coconuts(sailor, nuts) do
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if n = do_coconuts(sailor, nuts, sailor), do: n, else: coconuts(sailor, nuts+sailor)
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end
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defp do_coconuts(_sailor, nuts, 0), do: nuts
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defp do_coconuts(sailor, nuts, _) when rem(nuts, sailor-1) != 0, do: nil
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defp do_coconuts(sailor, nuts, i) do
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do_coconuts(sailor, nuts + div(nuts, sailor-1) + 1, i-1)
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end
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end
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Enum.each(2..9, fn sailor ->
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IO.puts "#{sailor}: #{Sailor.coconuts(sailor)}"
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end)
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