commit b5ea05b3ffa77daa32584b263fdec134f2783fa7 · hauleth.dev/advent-of-code

+1 -1

2025/day02.livemd

···

       77
       77
        
       |> Enum.sum()

     

       78
       78
        
       ```

     

       79
       79
        
       

     

       80
       80
       -
       <!-- livebook:{"offset":1434,"stamp":{"token":"XCP.XGwVuWkI5pveel-Tx5hGUsCOmJKjA6byJZgIevkuBoRsAeaI3iyjR6XNRi9nwICSeuXI_2gJ9nWRKsSPzj30sqjcf8vmy_6FGXhLmap28ImjUKnK7ruHw0EpJansNfksuQ","version":2}} -->

     

       80
       80
       +
       <!-- livebook:{"offset":1434,"stamp":{"token":"XCP.NoAgOlNzs9jV0M8QxQDrdfMwKQR_xYkBG2FLF06XnKPtJ5ps3S83JucEVQZ7fJF0utUaryiCOT7xPWESlw3lS3TI6Jujiw8uFAZdKEXUL_jmZMHVF37TxiY4vRwKjfwvfg","version":2}} -->

+52

2025/day03.livemd

···

       1
       1
       +
       # Day 03

     

       2
       2
       +
       

     

       3
       3
       +
       ```elixir

     

       4
       4
       +
       Mix.install([:kino_aoc])

     

       5
       5
       +
       ```

     

       6
       6
       +
       

     

       7
       7
       +
       ## Section

     

       8
       8
       +
       

     

       9
       9
       +
       <!-- livebook:{"attrs":"eyJhc3NpZ25fdG8iOiJwdXp6bGVfaW5wdXQiLCJkYXkiOiIzIiwic2Vzc2lvbl9zZWNyZXQiOiJBRFZFTlRfT0ZfQ09ERV9TRVNTSU9OIiwieWVhciI6IjIwMjUifQ","chunks":null,"kind":"Elixir.KinoAOC.HelperCell","livebook_object":"smart_cell"} -->

     

       10
       10
       +
       

     

       11
       11
       +
       ```elixir

     

       12
       12
       +
       {:ok, puzzle_input} =

     

       13
       13
       +
         KinoAOC.download_puzzle("2025", "3", System.fetch_env!("LB_ADVENT_OF_CODE_SESSION"))

     

       14
       14
       +
       ```

     

       15
       15
       +
       

     

       16
       16
       +
       ```elixir

     

       17
       17
       +
       batteries =

     

       18
       18
       +
         puzzle_input

     

       19
       19
       +
         |> String.split("\n", trim: true)

     

       20
       20
       +
         |> Enum.map(fn row ->

     

       21
       21
       +
           row

     

       22
       22
       +
           |> String.to_charlist()

     

       23
       23
       +
           |> Enum.map(& &1 - ?0)

     

       24
       24
       +
         end)

     

       25
       25
       +
       ```

     

       26
       26
       +
       

     

       27
       27
       +
       ```elixir

     

       28
       28
       +
       defmodule Joltage do

     

       29
       29
       +
         def make_largest(list, n) do

     

       30
       30
       +
           to_remove = length(list) - n

     

       31
       31
       +
           Enum.reduce(1..to_remove, list, fn _, acc -> make_larger(acc) end)

     

       32
       32
       +
         end

     

       33
       33
       +
         

     

       34
       34
       +
         def make_larger([_]), do: []

     

       35
       35
       +
         def make_larger([a, b | rest]) when a < b, do: [b | rest]

     

       36
       36
       +
         def make_larger([b | rest]), do: [b | make_larger(rest)]

     

       37
       37
       +
       end

     

       38
       38
       +
       ```

     

       39
       39
       +
       

     

       40
       40
       +
       ## Part 1

     

       41
       41
       +
       

     

       42
       42
       +
       ```elixir

     

       43
       43
       +
       Enum.sum_by(batteries, &Integer.undigits(Joltage.make_largest(&1, 2)))

     

       44
       44
       +
       ```

     

       45
       45
       +
       

     

       46
       46
       +
       ## Part 2

     

       47
       47
       +
       

     

       48
       48
       +
       ```elixir

     

       49
       49
       +
       Enum.sum_by(batteries, &Integer.undigits(Joltage.make_largest(&1, 12)))

     

       50
       50
       +
       ```

     

       51
       51
       +
       

     

       52
       52
       +
       <!-- livebook:{"offset":1124,"stamp":{"token":"XCP.c4B4LAKOm9IZipbHc85MIeUBdcwcaQptUgMJIlHzU3DD1hssADSGdE-vByW1pHXsrARIeklYPeAk8Nn3AXBYvoEjBgm8zEP9oMXmp04xI_hLHezHURvrp6zdapkG0-l_sw","version":2}} -->