Day 03

Mix.install([
  {:kino, "~> 0.6.2"},
  {:kino_aoc, git: "https://github.com/ljgago/kino_aoc"}
])

:ok

Input

{:ok, result} = KinoAOC.download_puzzle("2022", "3", System.fetch_env!("LB_AOC_SESSION"))
input = result

"gfWpjRRQffQGCHHJsGqjsj\nSclzJZZvmmnPbJtVSqqNBqVCBdSCsd\ntlbvZJDZtmtPcJmlPnhMFQWWpMRFTfLDRRTWRp\nHjMPgSWjVrjgbHRRSSMRgjRdpdbGdlcdCvQfcCdlwQJfdf\nLNDnhtNtLNFFZDtFnhzvdldDflvvDCdlJfldpJ\nZFLFZZmFtFtTNTSPRrVPWWMpRP\nqLBSBLRwmgzqCbzCffDlrfCV\nTFFFHNWFMFFMpHpGHMTHGNhrldWZCsdZsslZlZfrflDVss\nPTMcPGntTThHhTGctnMvSwjjvmmqLBmnjqqgCR\nnClJtMwwntqVVPJcgZqq\nmjpsDcrcSSFFPZqFBWWgVP\nvQcjsvhrvvrmhbmNHMNnlHbNMtCtNM\nbgvvhnTQtjrrrhsDDf\npLSMltLzLLSjFrSSjrSJHD\nzNWRLBdZPllPQtCvttgCqb\nDRlDrrFTNDNlgzsGTBfcnqhhcnJfcrCSqc\nMMmmdWtdLmvtldHjMmQfPBqSJWnfCCCqcWSSPJ\nvjHMjLmjpLtHptQLmHvwTRgNVVpTzZFZgZRlsVTN\nrzpMpDCGFCFFjRFsRPFRNFPv\nfWclbHCHtSmfvjnmfsvZ\nwTcTlSwwtQtWclBQBLGMLMCLVzVLwJGqLd\nMQSjLNjPPLLSBPjfQhSPHjDVCjDtVVpDHwbwVpbD\nRcmWzsRrzZrmTszWRqWlmRJscbtHwCbndCtcDVddDpdnVnbt\nJTsrGGTqmwTlWmTzJzWmhhPLLGgPFgBffSSPhFFM\nqMMRNZMDDNWLPqfzCgDcGncVDCgG\nwwBFhwhhBgmcVzhghG\ntbJbjjtJvwtdtwjpFtlbvtdTLNSMqNqMMgqNHPlZRTNggL\nqmjMHsZmZSbjbZMjSLFFFFwgsgvFswpwww\nhRJBhmnhhvFFwhcv\nllfWDWzrzBNTRfNBrWzzTmZbGTMjPqMmZPjVbSZGSP\nCRRPLwwcclcGVppQ\nSHFjDjjHDTfSDNTTHfSHjQVGrpmllQQWltVVVZGp\nHFlqzDTfqlzwbgPJLwCP\nWRCNLphpLppSCWVHNfLRzVnQMnBnMddPMQDFQgrhPQFM\njTjJqvqjvPVJFJFBJF\nqTsZbvGqqZlstsmZVljtwqwSHHNWczHSSRcWNSRHzzNfbW\nglgzDzHjSrVHcVgbrjmNsscNGmNWssGNNtst\nhHPQLHJpwdLpdHfQQtnZmNMwnZGZWwsFZM\nQpdhPJRTJfPphJfhCBlVqVvgvVDBbvVqDbHD\nVtHzjZpjVtHrprgGmjHsGHNdSJFQRcLJqCdQcSqJNpcq\nbBWfTPwhbfDlMnhffRwQJQNdqJcLFQLSdR\nbhBhvfMWTnlDnTBfPSmvmjsjmmGtzHtsHm\npcRPRPWrSDcJGZSStmwZZS\nVnLfCfTlfVzfnMMBCqVNZJdtjNtJjhJdGNNbwT\nBLvqCCMVsnRQsPQgDcZH\ncQbqqQhDGhlQfQlhQrqGsTNgLgCpRgLTPPPLNbpg\nwtHVddVFwSHznZwwznCpRBdjppNBNTTdCjRR\nZtWFwWtSmvVnwZDrCMGfQlDDJQmD\nPzPZGCZzrZrlhdjdCqfCsqQdRD\ncbvZLVVFvbbNSNFHSDnsDQdnfqNQDRngsR\nFJHSLSFSScJJbWHFmFVFSZmrrzBmhtBwmzBMPMPzPh\nnlpFcLBgcVcLbssGVBGGrlpGPhJJJJJqPBZPDNMQMJJhJQZZ\nSSTjHzfHwtZSPVQVQMRQ\nTzVHwWfTtzwdVzsbFnGgsbdcGrLc\nFppVBRVZDdLmrDGmmfrQ\nNtNMPNshJCzznLGJSrqRrRrr\ntRssthhPlCWhPzsWtzhzCbVVjwTpVwdZZTpwjbdBbwBc\nTTWblHWScvPCCHTWFzSrqqsNNSmdmqrrpz\nRLRwjjnjZNprzmmZcq\nQQgtQnccQDGjgLDRRcLthQhFBvCbMtMHTWlBFllBbFCMTW\nWnBVNvDnVsNvZWdrWDLVDMbsHpTjpHCSSClsbSCCMH\nGPFtmztzgPhRFtJTdbTwjppSCjpgSl\nhJcfPtQhdtWNVZqNnqNQ\nGLcqZPPsnqQcFsmBBrqRvrddNqrC\nMtHthJwLllwvjRvvtrvBRS\nVHMfDLbpfznszZQG\nWBSdPlQPRfBtGQPfBGPBJgzgjwsJzsszJwCrdwCT\nZpppVpMVpnVHMVVbZRJrCgwRzTJrwNJw\nMvhmnpLqLmhVmBlftRQBFSlR\nhhQlSJqhtCSnqZJnqShSlNDwRzpvdwRlMBMMdcjRjMpMRc\nfrrGmLmWbfFrsmFHmBzBvBcwdJbvpjzbMM\nmmgFrVGLWJLFGsgfhSVtVPqntqnnSStN\nSFJTJTSqswwFQbwf\ncDtcWPclrtPwVsfssQmN\nHDtwWCgWdggdzSGJMSzGMq\nJpqJtWRJMhCMJpMQCWtFrjgHdgdlgllwNjlQjldH\nfBzPZcZvnBmDnZvZBZDmPvglVVVdgHHSwrNRgVgwNPRH\nGbZnZccfvcsZmccsmnnZTRbCCMWFTWJqFCCMJFRT\nvrrFqrFTBTmLmNrLMqMTHddJbHpWnhdWdWbHhJGM\nwBzfwzcQSzWSSshpdWGp\ngwjPPPDQtzQlzQDPqTgLBRmRqZBvqFNR\nbWVptFFsbPcZsGLhsZGmLB\nqnWrnrHdMCDCNqfWmvRRZSSRLdRGZGRG\nnNqqNDfMrMWHDQNHzWfHNDnwzblpzFlbwtFbVVlwVcPJpP\nBHJhlHdJQggvddglJBBhglhQzZHPZpFFPDMzFDDRDFZZDFZD\nrSTfqnCffMfCVfCLNqbzbjWNDbbWDPFpPFbP\nnfnnrSfCTVSwrqSLCGfTGlgQhlvsGMJQJBhhssJhGc\ntBjjDjjqfDjLfJlrLgglvmrlmrcc\nTwNNTVhwwpgvGSNNSssS\nTbwhnvvChhbVRTPPRJBJQQfJttMQQJCQfW\nmWSvSQVgmWQsQvspQJlrlLnJLLpCClhhlp\nbFHRjZdNjjBZzFzhtnCllCcJLrCBll\nHFFNHbdZZLZjfPFjHVQmWDDVsvsmTqVqDf\nJJPllQQClqgBCgdHwHbpjVTwHd\ntmGZtjGjHZpVbfMT\nShGjNGWmDSNcNRtGmshDRzzCvzQJJRBLrvlrBPJv\ncTpqsTWqVVpsNLfvCDFlMFDVFL\nJnndJPddQgzHlvMJFDhLCG\nBjtntgdRnQgzjdBRQBlpNWrTTlNTSwNpWS\nqHmqLVLjmVqsDBLtmjmbtPwCTwwPzGWRgGwGwMwW\nZhcCNCSprRTWTwSnWW\nhflhZvvQhppZfcNpvrhpQHjVjLmbVmmVHVCFDvqVFb\nnnNrwDnZrspwDNnZsNSDsNbCmpjvMTPQjLMmPmmQPGBTQP\nFdVtRdRfctBQPmTtTLQB\nqhzWVWJqVHwbhlLSsS\nhtWmhDhFztnztDhtBmBtghPRSrpfjVwPdfPwpwnRSVrr\ncbCHvgJGcTqbqcbqqqcqsMsRVrSCwffdRPPpVpwCRSwfjj\nGlgGQqTqbgQzttmBNNFz\nNWQNQgdTgjQNddTZfrCQWRDnnnbqnLqnRcjJlqqvDj\nFtSSmSmJhpllcclDvpln\nJBVVSsSFBVBttShFGSPQfCGNdrMfZZTQTZNNdC\nHgHthMhphcbfbMMfHhsGGDCRRVlcVSScsCRz\nnWvPFqLqPNdjnNLnjdJnPdWjGlssDPSsllVCRzlTCTGlSDzS\nRvddJRJQHwQwpZZb\ngdZwgpjZZQtHTdrWrwdpWRnlhNBRlLbFthNhflhBnL\nCVzDCPGMVqVmGsGGbJCmCDvMcRcqnBFFFnRBBNRBBNqhnFfF\nDsmSGsGPzvMGJvdbgTSTbjbSSdgH\njBGmbNBQGdBNNDJNQRLLVDsHtDRzHHZZcH\nwCWPFWPCrPhPrplvprhwpCHHtszttqZslRVHLtzVlJZL\nvprMMvMnJCwnnPShNGSTfGSfNmmgdNff\nbPtLbvVWWztbLSVVnbszpzQsrcDDBdpRcDrs\nllZmgCZqgCFgmdRdJcscBdJsmQ\nFZlgfqCFfgZHlqCMCglwCFGWntLLSMRSPGPVttWRtVGL\nvtnDsDtrnrSvrMVmbrrJg" <> ...

Part 1

defmodule RuckSack do
  def find_common(first, second) do
    MapSet.intersection(MapSet.new(first), MapSet.new(second))
    |> MapSet.to_list()
  end

  def to_priority(char) do
    val = :binary.first(char)

    cond do
      val >= 97 and val <= 122 -> val - 96
      val >= 65 and val <= 90 -> val - 38
      true -> val
    end
  end
end

defmodule PartOne do
  def resolve(input) do
    IO.puts("--- Part One ---")
    IO.puts("Result: #{run(input)}")
  end

  def run(input) do
    input
    |> String.split("\n", trim: true)
    |> Enum.map(fn x ->
      x = String.split(x, "", trim: true)
      half = (length(x) / 2) |> round()
      Enum.chunk_every(x, half)
    end)
    |> Enum.map(fn x -> RuckSack.find_common(Enum.at(x, 0), Enum.at(x, 1)) end)
    |> List.flatten()
    |> Enum.map(&amp;RuckSack.to_priority/1)
    |> Enum.sum()
  end
end

{:module, PartOne, <<70, 79, 82, 49, 0, 0, 12, ...>>, {:run, 1}}

input
|> PartOne.resolve()

--- Part One ---
Result: 7845

:ok

ExUnit.start(autorun: false)

defmodule PartOneTest do
  use ExUnit.Case, async: true
  import PartOne

  test "part one" do
    input = "vJrwpWtwJgWrhcsFMMfFFhFp
jqHRNqRjqzjGDLGLrsFMfFZSrLrFZsSL
PmmdzqPrVvPwwTWBwg
wMqvLMZHhHMvwLHjbvcjnnSBnvTQFn
ttgJtRGJQctTZtZT
CrZsJsPPZsGzwwsLwLmpwMDw"
    result = run(input)
    assert result == 157
  end
end

ExUnit.run()

.
Finished in 0.00 seconds (0.00s async, 0.00s sync)
1 test, 0 failures

Randomized with seed 67809

%{excluded: 0, failures: 0, skipped: 0, total: 1}

Part 2

defmodule RuckSack do
  def find_common(first, second, third) do
    MapSet.intersection(MapSet.new(first), MapSet.new(second))
    |> MapSet.intersection(MapSet.new(third))
    |> MapSet.to_list()
  end

  def to_priority(char) do
    val = :binary.first(char)

    cond do
      val >= 97 and val <= 122 -> val - 96
      val >= 65 and val <= 90 -> val - 38
    end
  end
end

defmodule PartTwo do
  def resolve(input) do
    IO.puts("--- Part One ---")
    IO.puts("Result: #{run(input)}")
  end

  def run(input) do
    input
    |> String.split("\n", trim: true)
    |> Enum.chunk_every(3)
    |> Enum.map(fn x ->
      Enum.map(x, fn x -> String.split(x, "", trim: true) end)
    end)
    |> Enum.map(fn x -> RuckSack.find_common(Enum.at(x, 0), Enum.at(x, 1), Enum.at(x, 2)) end)
    |> List.flatten()
    |> Enum.map(&amp;RuckSack.to_priority/1)
    |> Enum.sum()
  end
end

{:module, PartTwo, <<70, 79, 82, 49, 0, 0, 11, ...>>, {:run, 1}}

input
|> PartTwo.resolve()

--- Part One ---
Result: 2790

:ok

ExUnit.start(autorun: false)

defmodule PartTwoTest do
  use ExUnit.Case, async: true
  import PartTwo

  test "part one" do
    input = "vJrwpWtwJgWrhcsFMMfFFhFp
jqHRNqRjqzjGDLGLrsFMfFZSrLrFZsSL
PmmdzqPrVvPwwTWBwg
wMqvLMZHhHMvwLHjbvcjnnSBnvTQFn
ttgJtRGJQctTZtZT
CrZsJsPPZsGzwwsLwLmpwMDw"
    result = run(input)
    assert result == 70
  end
end

ExUnit.run()

.
Finished in 0.00 seconds (0.00s async, 0.00s sync)
1 test, 0 failures

Randomized with seed 135085

%{excluded: 0, failures: 0, skipped: 0, total: 1}