aoc_day1_nx.exs

# Part 1
File.read!('aoc/1.txt')
|> String.replace("\r", "") # i am on windows right now :(
|> String.split("\n")
|> Enum.map(&String.to_integer/1)
|> Nx.tensor()
|> then(fn x ->
  Nx.greater(Nx.slice_axis(x, 1, Nx.size(x) - 1, 0), Nx.slice_axis(x, 0, Nx.size(x) - 1, 0))
end)
|> Nx.sum()

# Part 2
File.read!('aoc/1.txt')
|> String.replace("\r", "") # i am on windows right now :(
|> String.split("\n")
|> Enum.map(&String.to_integer/1)
|> Nx.tensor()
|> Nx.window_sum({3}, strides: [1])
|> then(fn x ->
  Nx.greater(Nx.slice_axis(x, 1, Nx.size(x) - 1, 0), Nx.slice_axis(x, 0, Nx.size(x) - 1, 0))
end)
|> Nx.sum()