hauleth.dev
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Improve performance od day 07 and fix day 06 title
+2
-2
2024/day06.livemd
+2
-2
2024/day06.livemd
···
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<!-- livebook:{"persist_outputs":true} -->
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# Untitled notebook
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```elixir
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Mix.install([:kino_aoc, :arrays])
···
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4432
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```
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<!-- livebook:{"offset":7387,"stamp":{"token":"XCP.Wj_YFc-zYzAPEIaLCGnT6vtMYoDgv-DJ3xiuAVdHZPkMwNpP5jrmLW4LBe4lzRgNN75xF-FYACOKdzd82Z71i5y8yC5Wmd072w6qDXxmygH8fZvTOAZM02UZvvg20b5Yhv0","version":2}} -->
···
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<!-- livebook:{"persist_outputs":true} -->
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# Day 06
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```elixir
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Mix.install([:kino_aoc, :arrays])
···
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```
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<!-- livebook:{"offset":7376,"stamp":{"token":"XCP.Bv-aM7sns5Kb69SQdY4giDFl6fWiJ5L3lnISxUUjGi_DgTgM_r5rl-y8sy2RLl-KbEtOmW99QQsGItLYJhKJmkOZ5pPZ_7Aw3BhkL_ap8RnW8UkOt_OsNdpqoZT7FEDtmFQ","version":2}} -->
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2024/day07.livemd
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2024/day07.livemd
···
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```
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warning: code block contains unused literal "190: 10 19\n3267: 81 40 27\n83: 17 5\n156: 15 6\n7290: 6 8 6 15\n161011: 16 10 13\n192: 17 8 14\n21037: 9 7 18 13\n292: 11 6 16 20\n" (remove the literal or assign it to _ to avoid warnings)
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└─ Workspace/hauleth/advent-of-code/2024/day07.livemd#cell:5stfqvjgwz4d5v5a:1
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```
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···
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defmodule Eq.P1 do
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def possible?(0, []), do: true
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def possible?(a, [a]), do: true
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def possible?(0, [_|_]), do: false
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def possible?(_, []), do: false
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def possible?(a, _) when a < 0, do: false
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···
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|> Enum.filter(fn {target, vals} ->
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Eq.P1.possible?(target, Enum.reverse(vals))
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end)
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|> Enum.reduce(0, & elem(&1, 0) + &2)
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```
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<!-- livebook:{"output":true} -->
···
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defmodule Eq.P2 do
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def possible?(a, [hd | rest]), do: possible?(a, hd, rest)
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def possible?(a, a, []), do: true
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def possible?(_, _, []), do: false
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def possible?(a, b, _) when b > a, do: false
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def possible?(target, curr, [a | rest]) do
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possible?(target, concat(curr, a), rest) or
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possible?(target, curr + a, rest) or
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possible?(target, curr * a, rest)
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end
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def concat(a, b) do
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String.to_integer("#{a}#{b}")
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end
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end
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```
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<!-- livebook:{"output":true} -->
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```
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{:module, Eq.P2, <<70, 79, 82, 49, 0, 0, 10, ...>>, {:concat, 2}}
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```
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```elixir
···
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264184041398847
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```
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<!-- livebook:{"offset":9239,"stamp":{"token":"XCP.jahJhDMdAl3PqiPODSOJfIpJq_WE2I1sNvBUcNkY-FP-lUYFrioZW8V3FxbSGrS_-uFSLbRAfdSuAPnnK09vkzrcdjq7uz6-aRoxHbpcVgFwLC_l-sbpUMFFHwKci93vcoE","version":2}} -->
···
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```
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warning: code block contains unused literal "190: 10 19\n3267: 81 40 27\n83: 17 5\n156: 15 6\n7290: 6 8 6 15\n161011: 16 10 13\n192: 17 8 14\n21037: 9 7 18 13\n292: 11 6 16 20\n" (remove the literal or assign it to _ to avoid warnings)
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└─ Workspace/hauleth/advent-of-code/2024/day07.livemd#cell:7pxlqq2wa3oqdwfr:1
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```
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···
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defmodule Eq.P1 do
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def possible?(0, []), do: true
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def possible?(a, [a]), do: true
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+
def possible?(0, [_ | _]), do: false
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def possible?(_, []), do: false
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def possible?(a, _) when a < 0, do: false
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···
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|> Enum.filter(fn {target, vals} ->
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Eq.P1.possible?(target, Enum.reverse(vals))
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end)
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|> Enum.reduce(0, &(elem(&1, 0) + &2))
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```
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<!-- livebook:{"output":true} -->
···
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defmodule Eq.P2 do
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def possible?(a, [hd | rest]), do: possible?(a, hd, rest)
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defp possible?(a, a, []), do: true
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defp possible?(_, _, []), do: false
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defp possible?(a, b, _) when b > a, do: false
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defp possible?(target, curr, [a | rest]) do
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possible?(target, concat(curr, a), rest) or
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possible?(target, curr * a, rest) or
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possible?(target, curr + a, rest)
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end
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defp concat(a, b), do: a * l10(b) + b
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+
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defp l10(n) when n >= 100, do: 1000
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defp l10(n) when n >= 10, do: 100
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defp l10(_), do: 10
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end
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```
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<!-- livebook:{"output":true} -->
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```
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{:module, Eq.P2, <<70, 79, 82, 49, 0, 0, 9, ...>>, {:l10, 1}}
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```
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```elixir
···
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264184041398847
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```
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<!-- livebook:{"offset":9317,"stamp":{"token":"XCP.DCDL30p1jz3L9vRDdQ5EJLc3r7y1DTsVhQ3GXFK_huvoEXqgYu2TTOfTq8AFYpt5W6fEIo4MvfrnHttbqS-z4SjRkT7WM09v09mZ_FeyqstWzLMCK_oNqhrrdwPPv5BG_8c","version":2}} -->