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# AOC 2025 Day 3
## Section
```elixir
defmodule Day03 do
def data(:test) do
~s(987654321111111
811111111111119
234234234234278
818181911112111)
~s(987654321111111)
end
def data(:real) do
File.read!("day_03.dat")
end
defp prep(data) do
String.trim(data)
|> String.split("\n")
|> Enum.map(&(String.to_integer(&1) |> Integer.digits()))
end
def part_01(banks) do
prep(banks)
|> Enum.map(fn bank ->
Enum.reduce(bank, %{first: 0, second: nil, last: 0, dir: nil}, fn _battery, acc ->
acc
end)
end)
end
end
Day03.data(:test)
|> Day03.part_01()
```
See source 
