Day 2: I Was Told There Would Be No Math

day_2_i_was_told_there_would_be_no_math.livemd

Eli Chen

@elichen

aoc2015

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Day 2: I Was Told There Would Be No Math

Section

defmodule Foo do
  def sum(s) do
    [l, w, h] =
      s
      |> String.split("x")
      |> Enum.map(&amp;String.to_integer/1)

    2 * l * w + 2 * w * h + 2 * h * l + Enum.min([l * w, w * h, h * l])
  end
end

{:ok, data} = File.read("/Users/eli/Desktop/input.txt")

data
|> String.split("\n", trim: true)
|> Enum.map(&amp;Foo.sum/1)
|> Enum.sum()

defmodule Foo2 do
  def ribbon(s) do
    [l, w, h] =
      s
      |> String.split("x")
      |> Enum.map(&amp;String.to_integer/1)

    Enum.min([2 * l + 2 * w, 2 * w + 2 * h, 2 * h + 2 * l]) + l * w * h
  end
end

{:ok, data} = File.read("/Users/eli/Desktop/input.txt")

data
|> String.split("\n", trim: true)
|> Enum.map(&amp;Foo2.ribbon/1)
|> Enum.sum()

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