hauleth.dev
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2024 day 03 - remove unneeded and misspelled flag
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2024/day03.livemd
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2024/day03.livemd
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## Part 1
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```elixir
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Regex.scan(~r/mul\((\d{1,3}),(\d{1,3})\)/, puzzle_input, captures: true)
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Regex.scan(~r/mul\((\d{1,3}),(\d{1,3})\)/, puzzle_input)
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|> Enum.reduce(0, fn [_, a, b], acc ->
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acc + String.to_integer(a) * String.to_integer(b)
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end)
···
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## Part 2
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```elixir
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Regex.scan(~r/do(n't)?\(\)|mul\((\d{1,3}),(\d{1,3})\)/, puzzle_input, captures: true)
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Regex.scan(~r/do(n't)?\(\)|mul\((\d{1,3}),(\d{1,3})\)/, puzzle_input)
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|> Enum.reduce({true, 0}, fn
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["do()" | _], {_, sum} -> {true, sum}
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["don't()" | _], {_, sum} -> {false, sum}
···
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74361272
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```
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