Day 03

Mix.install(
  [
    {:kino, "~> 0.7.0"},
    {:kino_aoc, git: "https://github.com/ljgago/kino_aoc"}
  ],
  force: true
)

* Getting kino_aoc (https://github.com/ljgago/kino_aoc)
remote: Enumerating objects: 58, done.        
remote: Counting objects: 100% (58/58), done.        
remote: Compressing objects: 100% (39/39), done.        
remote: Total 58 (delta 16), reused 51 (delta 10), pack-reused 0        
origin/HEAD set to main
Resolving Hex dependencies...
Resolution completed in 0.149s
New:
  castore 0.1.19
  finch 0.14.0
  hpax 0.1.2
  jason 1.4.0
  kino 0.7.0
  mime 2.0.3
  mint 1.4.2
  nimble_options 0.5.1
  nimble_pool 0.2.6
  req 0.3.2
  table 0.1.2
  telemetry 1.1.0
* Getting kino (Hex package)
* Getting req (Hex package)
* Getting finch (Hex package)
* Getting jason (Hex package)
* Getting mime (Hex package)
* Getting castore (Hex package)
* Getting mint (Hex package)
* Getting nimble_options (Hex package)
* Getting nimble_pool (Hex package)
* Getting telemetry (Hex package)
* Getting hpax (Hex package)
* Getting table (Hex package)
==> table
Compiling 5 files (.ex)
Generated table app
==> mime
Compiling 1 file (.ex)
Generated mime app
==> nimble_options
Compiling 3 files (.ex)
Generated nimble_options app
==> kino
Compiling 36 files (.ex)
Generated kino app
===> Analyzing applications...
===> Compiling telemetry
==> jason
Compiling 10 files (.ex)
Generated jason app
==> hpax
Compiling 4 files (.ex)
Generated hpax app
==> nimble_pool
Compiling 2 files (.ex)
Generated nimble_pool app
==> castore
Compiling 1 file (.ex)
Generated castore app
==> mint
Compiling 1 file (.erl)
Compiling 19 files (.ex)
Generated mint app
==> finch
Compiling 13 files (.ex)
Generated finch app
==> req
Compiling 5 files (.ex)
Generated req app
==> kino_aoc
Compiling 3 files (.ex)
Generated kino_aoc app

:ok

Section

{:ok, puzzle_input} = KinoAOC.download_puzzle("2022", "3", System.fetch_env!("LB_SESSION"))

{:ok,
 "DMwrszrfMzSSCpLpfCCn\nRMvhZhQqlvhMvRtbvbcPclPlncddppLTdppd\ntVMQhFtjjWmsFJsmsW\ntrRtvNhfJhSzzSTFVhQQZQhHGphP\nCnLMBWLwDMgMcwwdngdHGPVTQGpTHZdGPGpd\nLLDqcDgwqCMnLWqtvzrzbbtJqPjJ\nwQQwHNQLmbWQbQRHwHNFBbwqPfjqlzRMGRqzpSfvPlzplM\nnCtGCZZtsGsrtDMZpfMpSlMlvlZq\ncJctJCgVJsCJnDTsCthGhGLwBWBbbQmLbgQLQQdWbbbQ\nZWnNlTNTnhhQQlDNdmmpwrrrqBwjwjZd\nGzvlVRSfvMVMvGlSpdCCdjmfpmBCdsqB\nbzlFlLzJWLHHttLL\nSmzFhVDzrmSrszVDVhSVbhZcCZdfZNcnMfMbZnNN\nPTTRGqwqTqWRwLgTLTZGnCbZbNddZCCtMcNs\nsgPqPqgJgWWqjjwgwLLVFBFSVmvmBBrmJJDSvp\nCBccfSBhcSBddfgtlJmmmwmPRwmh\nFpTzzGWHWprgDtJlDZDPFR\nHbbTzWnTrnWtCbQBbQqQbSjf\nfPHspCjgwZggSvZQ\nRrNhzFZFcNzFLNLNwQlSlLnv\nTRFrcDVrrRmrhFRZzVrczqhRpjqjsssCpfHjsCdpsPfpjCMC\nZBnBTMVTSbGbTVTGbCPgqsgPtHtgCcPtBB\nldDrmnnNrzhdhfgcsHqcsfCcsCHg\nzFdrzNdzQNDDhFdWldDrJTbZTbLZJVVVpMVWVnLS\npLnpQNhBbnWvbsWm\nFrFwjlTPTdTqqrDZWbvmZbpSgmJWvbgS\nRqDqRrdGFpGRFrFFdTNzCcHcHLHBzQCcNNGN\nbvRCtbtCPfSGtCcvCbPNlglqgqlGZMzTgnlZnq\nhrmWWFspsHWrzNwTnFlTMTwFFn\nHpjJDWBQmmQdRffbPtSzdJ\nGpHjFsjMFpCpMWjMGCqWmmqrWQtmthdbDbbD\nfzgLTJwJPSgJgzSzPfhmqmQhQHzQtbQDrrmq\nRNlBRwHfRJHLLfHTwLSBppNGvjNMFFCVpVFcvcFC\nSfQnfSFHfnvMtQQSnHJtMffsdTlZtdZmtllmTlmlRRbBRLDb\nhrwhWWwqzPrcCzwwzmPlRbdmlQDTPPBLDl\nCpwCzrwGzNCWrJnMvpMvfJVFvQ\nrCRPpgSggcpqrhPrCDDTLsMLDSDGLTMGVs\nHdvzmRWmlHzwvWHvRHRvHJbDFsdMssQQVGMDTMDLVLLFLT\nJBlBnnWBJlCqZRRqRBpr\nGtZllZDlfDpGHZtZBGBZpDmzQzzCSVVFHmmmsPCQWWSS\nJvFJJrwvNNcJTnbrTRNRSCzqwSsVPCPQqmCQszVm\nJLMnTbLnMgBhDFDf\nlffDhtgDJzCJNGGTzWTRRnRvBv\nqpbpdwqZwqZSwMPSqdQcQmTRnWvnBnRBQBtVnTvWmB\nSccbbwSbZbFPswpSZtgFlClLhgChhhNfJlFj\nClmCjCJBjwBVwJGjlGNFJlVMHSrfpDpTfrHMcHTppQVrHp\ndRLZWLvWSHmTccWW\nggtqzmRZnmhghZhZghntdqsvBbjlbNFFBPwNNJNNCBlwPGBz\nHZmsFZQpvZsWCZQvWrghGrhtgNzdHddHGh\nfWSbqWDJVwcSccNzrNhcBtGcgG\nVqVfTJnbWjqTSqbwDRfRvQvFpFLRpZsssQsCQZ\nFpFZNfplSTJmbZzddGzhDrWh\nLqLPPQjLLRMPqvjLLHQrLqrRWdzHnGhdthttGGbbDWhDDdWz\nsMLMgvRLgscrLrRQvwmTNNfpNplglplfmp\nMPVBmCmWGWRPPqRhLcnjcvjjcpjMvp\ntzwrwsJlrldJsrsrTtrzrTtSNnLJSShnjcncvnvqnSFnqN\nrswrzsbdwDHHbWZqVfWV\ndVmmMTmBPTrCBRMCqFHSWFFHWzCvCz\njNqfGsDqtsjGjQjDlcJFFFznFtzznvtFpFFp\nfNNhgsDcfNflqchVRdgVrRPRdVTRRb\nHJPLwgLvjttmgHJFjwHgtlsBbNbbNsPpblspTllThT\nMzmcRRrdDMVTzbhNNSszhl\nmCDDVqdVcdDrqfcCnrFwtGwvngwvtWJtFjWW\ndFDpmttBlvNNgWlglNDBFttmTGHTcSSJJHHnMsJsGGSdqcJj\nzLbwMLVQbQRwVsJsSHSsHcJqbj\nwfVZLPzfZZmpMZZMBl\nPZHZMJSTBWHNWSHzVnhhfnhThhpnpC\njFdBBtrFjpfnjfnf\nccGrbblbGRDQMlvmQBvmBl\nPCCTsnbPbHDnlDfDNB\nrMjQltgSqtvMjScQggjfVVzBzFHzGfVGDLGBqB\nvdtrMSttcdwcpSQSdglMrtWRRPJZCpsRZJmWRRWChWPh\npWzbsPCCPPpbptSMCJJwBQQGQt\ncDDmcTTRRqzFRddVTSJwMShMtBwhwQMDwv\nHldqVmVlZdLTcmRFdrngNNzrffjWpPLggP\nJPqvjJmmqvSLmPtpZdcftdmtfdCC\nswwhDRwBBHjFFBtBfZ\nRRzNQDwznDsDwWJjLNlrSPLSTr\nVQmdRLvDlmqZdFrBBJdW\nCMstGsnHnHGGMrMZwMpwBSbW\nGnsshssNfjtsnggnHCGhjtmfLQQczllvDRVTTQllQWlQ\ndhbNbswbwVdNtVdstBtgbNQTBCCSFTmfmMFmfRqQmmQM\nHFljLrvZfMQQQPvm\nWrpznLZZrnplpWbgdFcFsNzszgst\nLjddfTlMccnBfDQBtBQb\nZRSNchHwhNNCHNSWPQFFFHDBBtnQDH\nCNpZshSZgpwJmpdLMlplMc\nbTmTFmqzgbBntRVsFvVwcv\nCZfMrlZLLLMlfPZRLRHGstnjGwtvGcsSVwtcSGvn\nClZpMLCRMZMrHMLmWpqQBpzpgQzmbg\njDmSSGWDDdWdSqqDDqCqpJzqRRqpJnRsMRcMzM\nlPgNPvPrrgNrPhNszFggnRzccbMJgz\nZQTHQvQTZPrrQlBBrNvQZZGtTtGdsVCGsCTLLGDmLsjt\nrbCfBrbsvQqRFZRNZC\nHLSTcwqwZSQFFgRZ\nwdDwjpMHqJDTMTdqjlfBvGBhsbfhbsnb\nZhZcHHHlhgchHhlCZZhLCCbGdrsBBGPNBjGbsjNNjnJnPn\nwtJqqwDqQQMQFqSqTzwzVTBnGdsjBdnMdPGBBsBdnrjr\nRVzJzmSVZmLLWpCc\ngdqjQQrlhhQlQrhsnjjhLgmmvmHBBmTmZRsHJzTBHRJv\nNwNnGNbGPbmTGpJzppBG\nnDnVDfMDrQqQStgM\nMLbgbppMMgLmHgQttGQJgJrBShwNShWBBSNNrwNqNN\nGnTFlzCVVwPRrVWhSw\nGnDDdvdnZDTdnGMsHbbttZgttLbc\nmdmPmjClrTzqttfm\ncpFnSbcQQsqNNtqWJzHS\nQFpcMMBcZtLpQBjVjZhlPjjVlwvw\nspVsPjTZZMpZMVLDjmdSQJCLJSmLzdJQdl\nHhRnNrqwMhNhnqnHwGNRFBNBrzSCSdQmQCdddbrQSSclSSbQ\nnFNqGRvqBfjMvTssfZ\nFjjzjnpFqqzFFqgFSZjBhHfHhnHRDDwfdTdLfD\nMmCMGCsMWbtJrtCWCbmsmWWhdLGGwRBwdfdLhdTLhHHTBd\nbJmtrRvRjgzFFvVq\nRWwWmVQGMFGmMGVCVWRRZSBgDdSdJGlSJpcBGGSlpJ\nHHhQThnjBDHfSBlS\nbPhNjbsssQzFNQqWmz\nFTDtrjqwwqGtDbGnfBlcnLcWBZwlWn\nmMhRMvJsJvJnMHCvHmhLZLQlhWQBBfPfLPBZ\nHRCCsdNdvNmCvggFStbzjbGSSjjn\nsLGddsvvcZmLvrLMGcMsVnTTlqlHCsTHHVVgVt\nwRbfJPbpNRffRJMBhpDntTCHFNVgqllFlqggHC\nDpfbPhRDJPMJppJwzfpbbDGSjrGZvdccQdjGvQZdvrLz\nwTwLNLVTqnLMsBwfMsJmCj\nJhlGvcdJhSFvFvvvMfgBpCzjzdCfsMMs\nDSlPPJSGWrDcFPhtFhWJZHQZLTQVnRWRbHbZHQQT\nTmTgTrPDNLNVlDrmlbgNmrSSGbzjZGMvjpZjvvphWMzW\nQtBfdfQcdfHtZcnZn" <> ...}

Puzzle

test_input =
  "vJrwpWtwJgWrhcsFMMfFFhFp\njqHRNqRjqzjGDLGLrsFMfFZSrLrFZsSL\nPmmdzqPrVvPwwTWBwg\nwMqvLMZHhHMvwLHjbvcjnnSBnvTQFn
ttgJtRGJQctTZtZT\nCrZsJsPPZsGzwwsLwLmpwMDw"

"vJrwpWtwJgWrhcsFMMfFFhFp\njqHRNqRjqzjGDLGLrsFMfFZSrLrFZsSL\nPmmdzqPrVvPwwTWBwg\nwMqvLMZHhHMvwLHjbvcjnnSBnvTQFn\nttgJtRGJQctTZtZT\nCrZsJsPPZsGzwwsLwLmpwMDw"

defmodule Day03 do
  def compartment_to_priorities(compartment) do
    compartment
    |> Enum.map(fn
      lower when lower in ?a..?z -> lower - ?a + 1
      upper when upper in ?A..?Z -> upper - ?A + 27
    end)
  end

  def debugaboo(a) do
    IO.inspect(a)
    a
  end
end

{:module, Day03, <<70, 79, 82, 49, 0, 0, 9, ...>>, {:debugaboo, 1}}

Part 1

test_input
# Split into ruck sacks (by \n)
|> String.split("\n")
# Divide rucksack into two equal compartments
|> Enum.map(fn rucksack -> String.split_at(rucksack, rucksack |> String.length() |> div(2)) end)
# Convert each compartment into char lists
|> Enum.map(fn {a, b} -> {String.to_charlist(a), String.to_charlist(b)} end)
|> Enum.map(fn {a, b} ->
  {Day03.compartment_to_priorities(a), Day03.compartment_to_priorities(b)}
end)
|> Enum.map(fn {a, b} ->
  MapSet.intersection(Enum.into(a, MapSet.new()), Enum.into(b, MapSet.new()))
  |> MapSet.to_list()
  |> List.first()
end)
|> Enum.sum()

157

puzzle_input
|> String.split("\n")
# Divide rucksack into two equal compartments
|> Enum.map(fn rucksack -> String.split_at(rucksack, rucksack |> String.length() |> div(2)) end)
# Convert each compartment into char lists
|> Enum.map(fn {a, b} -> {String.to_charlist(a), String.to_charlist(b)} end)
|> Enum.map(fn {a, b} ->
  {Day03.compartment_to_priorities(a), Day03.compartment_to_priorities(b)}
end)
|> Enum.map(fn {a, b} ->
  MapSet.intersection(Enum.into(a, MapSet.new()), Enum.into(b, MapSet.new()))
  |> MapSet.to_list()
  |> List.first()
end)
|> Enum.sum()

7811

Part 2

test_input_2 = "vJrwpWtwJgWrhcsFMMfFFhFp\njqHRNqRjqzjGDLGLrsFMfFZSrLrFZsSL\nPmmdzqPrVvPwwTWBwg
wMqvLMZHhHMvwLHjbvcjnnSBnvTQFn\nttgJtRGJQctTZtZT\nCrZsJsPPZsGzwwsLwLmpwMDw"

"vJrwpWtwJgWrhcsFMMfFFhFp\njqHRNqRjqzjGDLGLrsFMfFZSrLrFZsSL\nPmmdzqPrVvPwwTWBwg\nwMqvLMZHhHMvwLHjbvcjnnSBnvTQFn\nttgJtRGJQctTZtZT\nCrZsJsPPZsGzwwsLwLmpwMDw"

test_input_2
# Split into ruck sacks (by \n)
|> String.split("\n")
# Turn each rucksack into a character list
|> Enum.map(fn a -> String.to_charlist(a) end)
# Turn each ruck sack into a priority list
|> Enum.map(fn a -> Day03.compartment_to_priorities(a) end)
# Turn each rucksack into a set
|> Enum.map(fn a -> Enum.into(a, MapSet.new()) end)
# Split into groups of three
|> Enum.chunk_every(3)
# Find intersection 
|> Enum.map(fn [a, b, c] ->
  MapSet.intersection(a, MapSet.intersection(b, c))
  |> MapSet.to_list()
  |> List.first()
end)
|> Enum.sum()

70

puzzle_input
# Split into ruck sacks (by \n)
|> String.split("\n")
# Turn each rucksack into a character list
|> Enum.map(fn a -> String.to_charlist(a) end)
# Turn each ruck sack into a priority list
|> Enum.map(fn a -> Day03.compartment_to_priorities(a) end)
# Turn each rucksack into a set
|> Enum.map(fn a -> Enum.into(a, MapSet.new()) end)
# Split into groups of three
|> Enum.chunk_every(3)
# Find intersection 
|> Enum.map(fn [a, b, c] ->
  MapSet.intersection(a, MapSet.intersection(b, c))
  |> MapSet.to_list()
  |> List.first()
end)
|> Enum.sum()

2639