40 lines
946 B
Elixir
40 lines
946 B
Elixir
defmodule DayOne do
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def part_one(input) do
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String.split(input, "\n") |> Enum.filter(&(&1 != ""))
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|> Enum.map(&DayOne.parse_num/1)
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|> List.foldr(0, &(&1 + &2))
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end
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def part_two(input),
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do: part_two(String.split(input, "\n") |> Enum.filter(&(&1 != "")) |> Enum.map(&DayOne.parse_num/1), 0, [])
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def part_two(input, acc, frequencies) do
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[head | tail] = input
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freq = head + acc
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# IO.puts("Got frequency #{freq}")
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if Enum.member?(frequencies, freq),
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do: freq,
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else: part_two(tail ++ [head], freq, [freq | frequencies])
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end
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def parse_num("+" <> num) do
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{intVal, ""} = Integer.parse(num)
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intVal
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end
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def parse_num("-" <> num) do
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{intVal, ""} = Integer.parse(num)
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0 - intVal
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end
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def parse_num(num) do
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IO.puts(num)
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0
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end
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end
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{:ok, content} = File.read("input1.txt")
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IO.puts("Part 1: #{DayOne.part_one(content)}")
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IO.puts("Part 2: #{DayOne.part_two(content)}")
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