20 lines
371 B
Elixir
20 lines
371 B
Elixir
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defmodule AOC.Day1 do
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def part1 do
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l = AOC.Util.input_integers(1, 1)
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[x, y] = Enum.filter(l, &((2020 - &1) in l))
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x * y
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end
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def find_three([h | tl]) do
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case Enum.filter(tl, &((2020 - h - &1) in tl)) do
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[x, y] -> h * x * y
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_ -> find_three(tl)
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end
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end
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def part2 do
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AOC.Util.input_integers(1, 1)
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|> find_three()
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end
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end
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