diff --git a/.tool-versions b/.tool-versions
new file mode 100644
index 0000000..d8df771
--- /dev/null
+++ b/.tool-versions
@@ -0,0 +1,2 @@
+elixir 1.17.3-otp-27
+erlang 27.1.2
diff --git a/README.md b/README.md
index f3f2c48..863bc93 100644
--- a/README.md
+++ b/README.md
@@ -32,8 +32,8 @@ Run all tests:
   <tr>
    <td><a href="https://adventofcode.com/2024/day/1">2024</a></td>
    <td><a href='https://github.com/wasi0013/advent_of_code/blob/master/lib/y2024/day_01.ex'> 1</a></td>
+   <td> :green_circle: :green_circle: </td>
    
-   <td> :white_circle: :white_circle: </td>
    
    
    </tr>
diff --git a/lib/y2024/day_01.ex b/lib/y2024/day_01.ex
index 4fdabf3..e1678f2 100644
--- a/lib/y2024/day_01.ex
+++ b/lib/y2024/day_01.ex
@@ -1,4 +1,4 @@
-defmodule Aoc.Y2024.Day01  do
+defmodule Aoc.Y2024.Day01 do
   @moduledoc """
   Solved https://adventofcode.com/2024/day/1
   """
@@ -8,14 +8,17 @@ defmodule Aoc.Y2024.Day01  do
   def solve_part1(data) do
     data
     |> rotate90()
-    |> then (fn [list1, list2] -> [Enum.sort(list1), Enum.sort(list2)] |>  Enum.zip() |> Enum.map(&Tuple.to_list/1) |> Enum.map(fn [a, b] -> abs(a - b)  end) |> Enum.sum() end)
-
+    |> Enum.map(&Enum.sort/1)
+    |> Enum.zip()
+    |> Enum.map(&Tuple.to_list/1)
+    |> Enum.map(fn [a, b] -> abs(a - b) end)
+    |> Enum.sum()
   end
 
   def solve_part2(data) do
     data
     |> rotate90()
-    |> then (fn [list1, list2] -> Enum.map(list1, fn a -> a * Enum.count(list2, &(a==&1)) end) |> Enum.sum() end)
+    |> then(fn [list1, list2] -> Enum.map(list1, fn a -> a * Enum.count(list2, &(a == &1)) end) |> Enum.sum() end)
   end
 
   def get_input() do
diff --git a/test/y2024/day_01_test.exs b/test/y2024/day_01_test.exs
index 1b34769..8e1e54c 100644
--- a/test/y2024/day_01_test.exs
+++ b/test/y2024/day_01_test.exs
@@ -4,7 +4,7 @@ defmodule AocTest.Y2024.Day01Test do
   import Aoc.Y2024.Day01
 
   test "Part 1 is solved" do
-    assert solve_part1(get_input()) == 1388114
+    assert solve_part1(get_input()) == 1_388_114
   end
 
   test "Part 2 is solved" do