Day 6

lib/day6.ex

@@ -0,0 +1,37 @@
+defmodule Aoc2023.Day6 do
+  use Aoc2023
+
+  def parse(input) do
+    input
+    |> lines
+    |> Enum.map(pipe(
+      String.split(":")
+      |> Enum.at(1)
+    ))
+  end
+
+  def part1(input) do
+    input
+    |> Enum.map(pipe(
+      String.split()
+      |> Enum.map(&String.to_integer/1)
+    ))
+    |> Enum.zip()
+    |> Enum.map(fn {time, dist} ->
+      1..time
+      |> Enum.map(&(&1 * (time - &1)))
+      |> Enum.filter(&(&1 > dist))
+      |> length
+    end)
+    |> Enum.product()
+  end
+
+  def part2(input) do
+    [time, dist] = input
+    |> Enum.map(pipe(String.replace(~r(\s+), "") |> String.to_integer()))
+    1..(time)
+    |> Stream.map(&(&1 * (time - &1)))
+    |> Stream.filter(&(&1 > dist))
+    |> Enum.count
+  end
+end

lib/mix_tasks.ex

@@ -7,6 +7,7 @@ defmodule Mix.Tasks.Aoc do
   defp module(3), do: Aoc2023.Day3
   defp module(4), do: Aoc2023.Day4
   defp module(5), do: Aoc2023.Day5
+  defp module(6), do: Aoc2023.Day6
   # [MODULE INSERTION POINT]  
 
   defp base_dir(), do: System.get_env("AOC_BASE")

tests/day6/1

@@ -0,0 +1,2 @@
+Time:      7  15   30
+Distance:  9  40  200

tests/day6/1.1

@@ -0,0 +1 @@
+288