dustinswan/advent-of-code-2024
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Switched from maps to lists for the gates

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Dustin Swan 2024-12-29 18:04:13 -07:00
parent cadb944182
commit 65a54ef8b8
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GPG key ID: AB49BD6B2B3A6377
1 changed files with 5 additions and 8 deletions
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13
day24/main.exs
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@ -1,6 +1,6 @@
defmodule Day24 do
def run do
{wires, gates} = parse_input("test.txt")
{wires, gates} = parse_input("data.txt")
# part1
part1 = run_loop(wires, gates) |> wire_value("z") |> b_to_d()
@ -41,15 +41,12 @@ defmodule Day24 do
end
defp run(wires, gates) do
Enum.reduce(gates, wires, fn {{left, right}, effects}, acc ->
Enum.reduce(gates, wires, fn %{left: left, right: right, output: output, op: op}, acc ->
l = Map.get(wires, left, nil)
r = Map.get(wires, right, nil)
if !is_nil(l) and !is_nil(r) do
Enum.reduce(effects, acc, fn {op, output}, acc2 ->
res = op.(l, r)
Map.put(acc2, output, res)
end)
Map.put(acc, output, op.(l, r))
else
acc
end
@ -70,7 +67,7 @@ defmodule Day24 do
end)
gates =
Enum.reduce(gates, %{}, fn el, map ->
Enum.reduce(gates, [], fn el, map ->
[logic, output] = String.split(el, " -> ")
[left, op, right] = String.split(logic, " ")
@ -81,7 +78,7 @@ defmodule Day24 do
"XOR" -> &Bitwise.bxor/2
end
Map.update(map, {left, right}, [{op, output}], fn acc -> [{op, output} | acc] end)
[%{left: left, right: right, op: op, output: output} | map]
end)
{wires, gates}