commit 6d248335528f323fc52ffa0296ca3ff2d1f498af · hauleth.dev/advent-of-code

+67

2022/day06.livemd

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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([

     

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         {:kino_aoc, git: "https://github.com/ljgago/kino_aoc"}

     

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       ])

     

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       ```

     

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       <!-- livebook:{"output":true} -->

     

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       ```

     

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       :ok

     

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       ```

     

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       ## Section

     

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       <!-- livebook:{"attrs":{"day":"6","session_secret":"ADVENT_OF_CODE_SESSION","variable":"puzzle_input","year":"2022"},"kind":"Elixir.KinoAOC.HelperCell","livebook_object":"smart_cell"} -->

     

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       ```elixir

     

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       {:ok, puzzle_input} =

     

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         KinoAOC.download_puzzle("2022", "6", System.fetch_env!("LB_ADVENT_OF_CODE_SESSION"))

     

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       ```

     

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       <!-- livebook:{"output":true} -->

     

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       ```

     

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       {:ok,

     

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        "pnnfhnhshrhmhwwmwzmznmnwmwfmfhfjfcjjtgtbggpdgdjjbjrjsjpjrrmddmgmpmddrhddnfnfzfpfvpfpprhhlffmtffqhhdtdcdsswsdwswmmfvvpdprrnnhhhtffnfbbznbznnvdnnbffjrfrbfrbrgbrrntnggrqqwtqwwgjgsswgwqwtwwsvwvbwvwrwlrlppzfzwfzzpmzzhqqzqlzlglzzmrmwrmwwvmwvvnppjfjttlffhjjjsccbggnffqgfgjjnccmdmzmllvnlnznttlvlttvnvgnvvqvmvqqzrqqcgglzzwtztwwmjmzjjnddsffqrqlrrvsvdvldvvlgvlvccdzczcqcpphggtnthhhtbhtttcjtjcjgcjcbbrhbbfrffgjgdgzddcttczzsccbpcpddcpcggmjgjddtcccthccfrccmdmhmddnwddfldffntnptnpttcptcptpfphhmfmwfwmmlblgbgvbvlltqltldttfcfcclgcllmplmlbbjnjzjnzzttnvvgddshddsqddggsqgqddsggdhghjgjhhgchhdmdjmjddgdhghrrphrrpnnqhhjwwqrrcmmslmmszzpgzpzzrmzmznzllnjnnlnbbdvdsdffbpffcmmnznqqcbbzvvjnjvvwqwgqqpnnzwnzwnzwwwlpwpzzfqzfqqwnqnbnfnqnbqqbggqnqdndrrzzlffbbgqgfgrfrqqsddnqnqjjgssqwqwcqcpcrrqppwpjjfnfpffhphwwmcwwznwznnplptlplnlsnlsldslslsffwtwftwtbtdbbjsjcczwwfllwtlwtlwlvwlwrwppsggvcvrrqcrqqvmqvmmbrrsbsfspspjpnnmpmqmcczgzffqmfmtmpppwzppzrpzrzsrrpqrpqpmpvmpvpttbqtqmtmjttqdqgggcppclcjcpcsppctpplpdpcppcmmdzmzddvhvhnhrrldllcwwbnwnssshlhrhthggtmggbjbjwwbvbttjllvrrfggngvngnmmvzzrrmddmcddztztctfccqpcpcqqvqppqcqdcdhhvhssgfgzgwwzmmnssvwwbqbhbnhnphpqqjcqcddfwfttqjtqtlttglljgjbgjgnnsqqvrvffqvqfqbffljjpffssqdsqstqqqldqqmhmsmsqqwtqwqdqgdgjjfbjffgbbrhhqghgppqgpgmpmmfzfhhfrhffgmfggpzgpzzhtzhhlbhhqbbzvvnvqnntptmmbhbdhdwwmjjcnnmsscqcbbtjtvjvwjvvmsmjmtmpmgghttcztzggpddbfbfgbbdsdrsrrqfqjjqfjjhzhtzzmdzzcgzgdzzmvmmfmjmgjmggmppbdppmzpppvfppzhhfsfwfhhpjpmmrjjpssdccjpjpwjppvdpphcpcjcfjfwjfwfjwfjjqcqcwqqqsmmmbbgdgwwpcwwdfdlflrltlgtthfhfjhhlthtddlgdggsjsrrdpdcppgttphpgpwppmpzmmrjmmvjvgvgfglfgllbqlqhllszzlwwhzzdfdcdtctptwtztfzzmjzjtjtrjrcrnrjjmwmnnbddgvgtgsstjsszmpqdmzgqflrbrspjmtzjcrmlzltmhgblghnwqvwwqwzbpnfrpdpblpjgshfccfbjfsnwvvhnjftsdnsgtzzjtzpmtfdvzrhtqpblhwgmqtgpbfvbdmsnrrrvvbstpsznvbbwgjfqjrhdvwvgptpglpfddhddmtglmjlpwlvfpbtbmgbplbzrlpdlvqzcwhbscpszgfstjpfdvfpmljlngrbgrdnnblzqrfpzsdvblpwbtnhdjclldvwvbwcwzfzbdspgwpfqjfbdbrqcshtlvcrdstnzggbwqnzbrfzbpnrtmvpbvdhcvdsdshgtvhfgdzljflppqbwclnvbhbczvrscjhlbgbfvwdjhnjsgmvwhpfgwbbmnndpnglfrmtfdzvqgfjdqfhgrhvpbqndmqnqccgwswwdsqjnbjtjbjdbqgjnmfbdvlnfwbnrdqgvgzzhmmbbdzfdvvpwhpbwbnzdcdpchrwlhfsjnhhjggvplmqggwjdsvjtpnpnqgldjjdcscrdltssjdrpcrfbgbcjfplhzgwbprfcslhpcngtszrghmwhzdqscbfrhzdwcffzvmjrmcjcstfvhplvrsglgsjnjtrpddsdfqjsndjnfmvdhfgdbzzflqhsrrwmrnlpqzmcddqbqvvzgtlztpgjnddtcnbmqsjlhmcszrmcjvwzpptlfqsmpvgnzvrjdwzpdwqgbmdgdtvjlmfczthjbcgfhbqpnmlbmrwwhfptzlbmfdhssznjcvjbmnjtnvzjhzczlrrdnttmmcbnzhqpplzqwgttwrnwfvmnptgqlfrnzvqpjfgrzwmlcwvtptvcvrlsrdwdgqfvffspmdbnnrqjttpqvhvdpbcrvzptwnhhfsqzchmncvttcdgdnlppcfzpmjpvbvqhlvplwvrmmbbggbwttwmvsqjlllsftprsmtmnzjcqfzblrllzgshfljchrjwjlpvhpbrtrsschzltrblgjnbgdnmwdggjhqggntblnhsvfgsbcblhmctbqzqwmhqnjhpzjfqpjdgwpzhczcftfcpdhvzhzccmwmrfrbqshzmtpqgpbbvfqqbjbmvnlnlwjtzrpmhdlffccrqcfgsjfszbrzrfztntchtmgmbhjgmlsqzcbtqqjzzlghtzzqmlnnvsgsvbbjfgqsqbqmqrdzwpwdgbggpdvhvnlzshhntprjdwhnwfvdjzpqgflwrvwgtmfdmfdztcbtfnjdrvgdwwczdgphnvdgrbdchprqldfjrvcsflcmlcmzqvqgsgnzcgmrhccgcmptcdzhbcdgdtppwztfstzqqzqrdzlnzthggjmpcflmbcmdrrjnnpbpqfmjbzqbtsjjgdlmgncbmgspqqvbrvzrdjscpzjsdtcdvsdwqlmwrngttswnrsbqctvhgfnnwblpcqzdmzpfchplslspmghvgcqntmlrfhgpcbpspvfhnvqvglsqzsnsdzddqpbsjhlclslngbwvvgjhwfcncqsmqwbptzvpzlzslsjjjldjpwpfrdlfbjphqcjtsgqdsdfdjhqgdhcppndwmhmmldvvmblcqcqfqhltbcbvrnghjfmtgqwtwljtczvqlnmgscjhqdhnzwhzvzzqnlsrhqvljqpgpwghfqlhjjrrhvnmnnrbnlhdcjctwtlhmhhmhjvcgzdrzmdjrvqzgnsttjdwglgwlcmbcdnjprgfsbbdzzngbqdrvwwwhbtlnnmzqdjttsrrpvlfdqnfhhtdtvmpcjgdwtbnqmwmtszdqfmbhjsjpqqddzfggwjhbtlnqfgcwbjzdtcpcpzgnrmnvwlpgmwfjlpgppdfrfvvjwsfcdqdnpcpjbqsvhttssgptqjghctrbgntlfjzdrfjccsprsjlrrwrzsmnjsqslmpdtrvhlqbnmgpjthpqdqmnvrtzlhhzzfzbrcclpmpcszhbttgrtcpgcpjwpdbfpfvgspsgtvglwthqcmcvmrfmclwlvjlsptfgmtlrnsvjrnfwzhdcsmgztpzfcvzwdztpppvqpvqfpdrsfnlhrbqwrsqjtwjmhnpwmqmpdgdhbtbpfwnmswffdqffdggrdrpmngvpzplmmwlddnhcvjjzqqfsbbtfmzdwnpvbjrshmllczhgvwwcbcbtfrfnplqjwmjlvpwwgfrtffwddwppsgtnlmpvfnhfzcsgjbqbjmbvpnqppsrvwnlzvcmjqgtbzrdsnrgwbfmrvnflgccrssfvcwgllqqbbcthzmbtnsmbzbcczhtzcvmthttpltrtdmgspctvtpvqbhmnnpnjwmhpqclmjsdrbjwvjbtzcjlqbjsvbgdwqzflnwzcfjwtrhjgfshfmwbjfwpnhjsmtpgbpwlfjjnmdlrhchmnfmgmgcrftmwbzshdwbhndgwtjbrrvbwprqppfmgfmfllpcjgrwdmtzddthsjlgjljv\n"}

     

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       ```

     

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       ## Task 1

     

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       ```elixir

     

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       index =

     

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         puzzle_input

     

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         |> to_charlist()

     

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         |> Enum.chunk_every(4, 1)

     

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         |> Enum.find_index(fn chunk -> MapSet.size(MapSet.new(chunk)) == 4 end)

     

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       index + 4

     

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       ```

     

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       <!-- livebook:{"output":true} -->

     

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       ```

     

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       1623

     

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       ```

     

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       ## Task 2

     

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       ```elixir

     

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       index =

     

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         puzzle_input

     

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         |> to_charlist()

     

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         |> Enum.chunk_every(14, 1)

     

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         |> Enum.find_index(fn chunk -> MapSet.size(MapSet.new(chunk)) == 14 end)

     

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       index + 14

     

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       ```

     

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       <!-- livebook:{"output":true} -->

     

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       ```

     

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       3774

     

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       ```

+307

2022/day07.livemd

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       # Day 07

     

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       ```elixir

     

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       Mix.install([

     

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         {:kino_aoc, git: "https://github.com/ljgago/kino_aoc"}

     

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       ])

     

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       ```

     

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       <!-- livebook:{"output":true} -->

     

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       ```

     

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       :ok

     

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       ```

     

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       ## Section

     

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       <!-- livebook:{"attrs":{"day":"7","session_secret":"ADVENT_OF_CODE_SESSION","variable":"puzzle_input","year":"2022"},"kind":"Elixir.KinoAOC.HelperCell","livebook_object":"smart_cell"} -->

     

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       ```elixir

     

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       {:ok, puzzle_input} =

     

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         KinoAOC.download_puzzle("2022", "7", System.fetch_env!("LB_ADVENT_OF_CODE_SESSION"))

     

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       ```

     

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       <!-- livebook:{"output":true} -->

     

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       ```

     

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       {:ok,

     

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        "$ cd /\n$ ls\ndir fts\ndir jnwr\ndir lrvl\ndir nzgprvw\ndir snwqjgj\n16394 tllvcdr.sjl\n195891 zbdp.gqb\ndir zddrb\n$ cd fts\n$ ls\ndir dlqtffw\ndir rbfmmjvd\n254713 wvwhrb.dhh\n$ cd dlqtffw\n$ ls\n73533 nqbvg.fgd\n$ cd ..\n$ cd rbfmmjvd\n$ ls\n290697 zcgrgff.fnf\n$ cd ..\n$ cd ..\n$ cd jnwr\n$ ls\n323577 ghmtnzr\n57588 tdcbdpnr\ndir wbv\ndir zzbvdcf\n$ cd wbv\n$ ls\ndir nmdwbnnr\n253584 slzdbm.ncn\n$ cd nmdwbnnr\n$ ls\n208370 scbcsb.pjg\n$ cd ..\n$ cd ..\n$ cd zzbvdcf\n$ ls\n8052 ssssrhwz\n$ cd ..\n$ cd ..\n$ cd lrvl\n$ ls\ndir bqqltcg\n189288 cwpwh\n90813 jhnddzml.lww\ndir pwc\ndir rjl\ndir rzvqvv\ndir slzdbm\ndir tcbjmq\n140665 zbdp.gqb\ndir zhbpqlnd\n$ cd bqqltcg\n$ ls\ndir dlbjblbf\ndir fdlw\ndir jnwr\ndir slzdbm\ndir zcgrgff\n$ cd dlbjblbf\n$ ls\n11732 rnsrrf.rtv\n$ cd ..\n$ cd fdlw\n$ ls\ndir hlvpfw\n228436 mzsfcvgv.pqw\n$ cd hlvpfw\n$ ls\ndir dhwq\n$ cd dhwq\n$ ls\n127459 cgdpqh.tct\n58310 jnwr.nqt\n$ cd ..\n$ cd ..\n$ cd ..\n$ cd jnwr\n$ ls\n305998 ssssrhwz\n129135 vrt.qdt\n86204 wnvm.bld\n$ cd ..\n$ cd slzdbm\n$ ls\n40915 zbdp.gqb\n120991 zsvffwlt.rbp\n$ cd ..\n$ cd zcgrgff\n$ ls\n94614 jnwr.mqm\n191626 zbdp.gqb\ndir ztrslh\n$ cd ztrslh\n$ ls\ndir bhzn\n201167 dvcjtzvs.rvd\ndir slzdbm\ndir szrth\ndir zcp\n$ cd bhzn\n$ ls\n119164 qbgmrqw\n102090 zbdp.gqb\n$ cd ..\n$ cd slzdbm\n$ ls\n124928 gtdq\n$ cd ..\n$ cd szrth\n$ ls\ndir hpbbsq\ndir vlwlsdjp\ndir zcgrgff\n$ cd hpbbsq\n$ ls\n151717 qsdhff.jsv\n$ cd ..\n$ cd vlwlsdjp\n$ ls\n15049 glpdjtq.mwm\n302526 jnwr.tds\n9550 lhwtbh\n22857 ssssrhwz\n$ cd ..\n$ cd zcgrgff\n$ ls\n73640 mpq.cdn\ndir zcgrgff\n$ cd zcgrgff\n$ ls\n115955 rssmrfbq.trs\n$ cd ..\n$ cd ..\n$ cd ..\n$ cd zcp\n$ ls\ndir qdjtmwrr\ndir wpdjttm\n$ cd qdjtmwrr\n$ ls\n138185 jnwr\n$ cd ..\n$ cd wpdjttm\n$ ls\n207755 vvwtghjb\n$ cd ..\n$ cd ..\n$ cd ..\n$ cd ..\n$ cd ..\n$ cd pwc\n$ ls\n15911 fqw\n$ cd ..\n$ cd rjl\n$ ls\n119274 ssssrhwz\n$ cd ..\n$ cd rzvqvv\n$ ls\n273935 ssssrhwz\n$ cd ..\n$ cd slzdbm\n$ ls\ndir hlvpfw\n290414 lgzbzjvd.glj\ndir ljpmphn\n316440 slzdbm.tsj\n$ cd hlvpfw\n$ ls\ndir mhvmszgh\n107004 slzdbm\n$ cd mhvmszgh\n$ ls\ndir tftstdp\n$ cd tftstdp\n$ ls\n176794 mpq.cdn\n$ cd ..\n$ cd ..\n$ cd ..\n$ cd ljpmphn\n$ ls\n37528 slfdb.bqt\n$ cd ..\n$ cd ..\n$ cd tcbjmq\n$ ls\n96506 lrz.nhb\n$ cd ..\n$ cd zhbpqlnd\n$ ls\n14027 ccswrthv.pfd\ndir clnqtjz\ndir fdsqmnn\ndir fwdt\ndir nljb\ndir npmsdrgp\n57812 slfdb.bqt\n184299 wmlmg\n241025 zcgrgff.wbh\ndir zggqfj\n$ cd clnqtjz\n$ ls\n62391 cbhw.wgr\n309318 jlm.lfq\ndir mzsfcvgv\ndir rrn\n307583 ssssrhwz\n$ cd mzsfcvgv\n$ ls\n1356 hrbh.wpz\ndir vnwqstw\n$ cd vnwqstw\n$ ls\n184434 hnhzdshl.lrl\n150624 wsrnprdb.pjf\n$ cd ..\n$ cd ..\n$ cd rrn\n$ ls\n105792 dzprqqc.rbh\n107482 ffdjdbc\ndir hnr\ndir rdmgtf\ndir rgrwp\n325147 shqr.pdj\n43186 slfdb.bqt\n236667 zcgrgff\n$ cd hnr\n$ ls\ndir gljrlhjm\n250526 mzsfcvgv.nsb\n43164 ssssrhwz\n$ cd gljrlhjm\n$ ls\ndir wjwqrnj\n$ cd wjwqrnj\n$ ls\n142366 gshl.qfc\n$ cd ..\n$ cd ..\n$ cd ..\n$ cd rdmgtf\n$ ls\n193562 gdrdnc.vml\n123723 hmqfdht\ndir lzfntb\ndir mjfwsmgd\n208819 nqbgcn.qfq\ndir tqh\n$ cd lzfntb\n$ ls\ndir gwnpsvw\ndir rsgwzhp\n103487 scvllbjh.pnw\n$ cd gwnpsvw\n$ ls\ndir lqnz\n81937 zbdp.gqb\n$ cd lqnz\n$ ls\n27250 zcgrgff\n$ cd ..\n$ cd ..\n$ cd rsgwzhp\n$ ls\ndir hhz\n$ cd hhz\n$ ls\n46435 djvfz\n$ cd ..\n$ cd ..\n$ cd ..\n$ cd mjfwsmgd\n$ ls\n25726 clcvm\n170085 zbdp.gqb\n$ cd ..\n$ cd tqh\n$ ls\n111272 gdq.llg\n3215 hdghs\ndir lpdcdr\ndir vhfr\n$ cd lpdcdr\n$ ls\n203902 hmqfdht\n$ cd ..\n$ cd vhfr\n$ ls\n91584 hmqfdht\ndir stmvj\n$ cd stmvj\n$ ls\n315660 wwpq.ffq\n$ cd ..\n$ cd ..\n$ cd ..\n$ cd ..\n$ cd rgrwp\n$ ls\ndir dhwtfld\n187439 hmqfdht\ndir jnwr\ndir npr\ndir sdsppq\n228581 twd.nnc\n42349 wbf.cwb\n194162 zbdp.gqb\n224441 zcgrgff.qpg\n$ cd dhwtfld\n$ ls\n152381 dqdrd\n$ cd ..\n$ cd jnwr\n$ ls\n229758 hmvw.gdz\n92710 mzsfcvgv.cdd\n79954 stjtn.gft\n89831 zbdp.gqb\n$ cd ..\n$ cd npr\n$ ls\n52767 hlvpfw.rqb\ndir nrbjzvgq\n270579 pbsq.msg\n240181 slfdb.bqt\ndir znbwnh\n$ cd nrbjzvgq\n$ ls\n295237 bwqqvn\n229608 dhrjnvtt.lvm\n55391 nlvn\ndir zcgrgff\n$ cd zcgrgff\n$ ls\n124604 hlvpfw.mlw\n$ cd ..\n$ cd ..\n$ cd znbwnh\n$ ls\n228293 zcgrgff\n$ cd ..\n$ cd ..\n$ cd sdsppq\n$ ls\n235741 bcsdzpfj.lvd\ndir jnwr\ndir njtrhrfm\ndir tvq\ndir wshgn\n$ cd jnwr\n$ ls\n273541 brcps\ndir gjt\ndir hlvpfw\ndir nbsdvpnj\ndir zcgrgff\n$ cd gjt\n$ ls\n184707 zbdp.gqb\n$ cd ..\n$ cd hlvpfw\n$ ls\n242810 zcgrgff\n$ cd ..\n$ cd nbsdvpnj\n$ ls\n181797 hlvpfw.gsd\n294284 hmqfdht\n2150" <> ...}

     

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       ```

     

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       ```elixir

     

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       defmodule FS do

     

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         def cd("/", _), do: []

     

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         def cd("..", [_ | path]), do: path

     

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         def cd(dir, path), do: [dir | path]

     

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         def file("dir " <> name, path, fs) do

     

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           put_in(fs, Enum.reverse([name | path]), %{})

     

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         end

     

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         def file(entry, path, fs) do

     

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           [size, name] = String.split(entry, " ", parts: 2)

     

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           put_in(fs, Enum.reverse([name | path]), String.to_integer(size))

     

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         end

     

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         def squash(fs) do

     

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           fs

     

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           |> Map.values()

     

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           |> Enum.reduce({0, []}, fn

     

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             fsize, {size, subdirs} when is_integer(fsize) ->

     

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               {size + fsize, subdirs}

     

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             subdir, {size, subdirs} ->

     

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               {dsize, _} = subdir = squash(subdir)

     

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               {size + dsize, [subdir | subdirs]}

     

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           end)

     

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         end

     

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       end

     

       63
       63
       +
       ```

     

       64
       64
       +
       

     

       65
       65
       +
       <!-- livebook:{"output":true} -->

     

       66
       66
       +
       

     

       67
       67
       +
       ```

     

       68
       68
       +
       {:module, FS, <<70, 79, 82, 49, 0, 0, 12, ...>>, {:squash, 1}}

     

       69
       69
       +
       ```

     

       70
       70
       +
       

     

       71
       71
       +
       ```elixir

     

       72
       72
       +
       fs =

     

       73
       73
       +
         puzzle_input

     

       74
       74
       +
         |> String.split("\n", trim: true)

     

       75
       75
       +
         |> Enum.reduce({[], %{}}, fn

     

       76
       76
       +
           "$ cd " <> path, {cwd, fs} -> {FS.cd(path, cwd), fs}

     

       77
       77
       +
           "$ ls", acc -> acc

     

       78
       78
       +
           entry, {cwd, fs} -> {cwd, FS.file(entry, cwd, fs)}

     

       79
       79
       +
         end)

     

       80
       80
       +
         |> elem(1)

     

       81
       81
       +
         |> FS.squash()

     

       82
       82
       +
       ```

     

       83
       83
       +
       

     

       84
       84
       +
       <!-- livebook:{"output":true} -->

     

       85
       85
       +
       

     

       86
       86
       +
       ```

     

       87
       87
       +
       {46592386,

     

       88
       88
       +
        [

     

       89
       89
       +
          {18070237,

     

       90
       90
       +
           [

     

       91
       91
       +
             {5362031,

     

       92
       92
       +
              [

     

       93
       93
       +
                {619773, [{295762, []}]},

     

       94
       94
       +
                {4327113,

     

       95
       95
       +
                 [

     

       96
       96
       +
                   {3365961,

     

       97
       97
       +
                    [

     

       98
       98
       +
                      {584534, []},

     

       99
       99
       +
                      {464942, []},

     

       100
       100
       +
                      {2036798,

     

       101
       101
       +
                       [

     

       102
       102
       +
                         {1075736, [{20405, [{20405, []}]}]},

     

       103
       103
       +
                         {47204, []},

     

       104
       104
       +
                         {820238, [{481556, [{60750, []}]}, {6432, []}, {14084, []}]},

     

       105
       105
       +
                         {44434, []},

     

       106
       106
       +
                         {49186, []}

     

       107
       107
       +
                       ]}

     

       108
       108
       +
                    ]},

     

       109
       109
       +
                   {512340, [{64408, []}, {398645, [{31665, []}]}, {49287, []}]},

     

       110
       110
       +
                   {448812, []}

     

       111
       111
       +
                 ]},

     

       112
       112
       +
                {415145, []}

     

       113
       113
       +
              ]},

     

       114
       114
       +
             {4095947,

     

       115
       115
       +
              [

     

       116
       116
       +
                {1171420, [{388084, []}]},

     

       117
       117
       +
                {1871858,

     

       118
       118
       +
                 [

     

       119
       119
       +
                   {241851, []},

     

       120
       120
       +
                   {314621, []},

     

       121
       121
       +
                   {90357, []},

     

       122
       122
       +
                   {454015, []},

     

       123
       123
       +
                   {240747, []},

     

       124
       124
       +
                   {121723, []},

     

       125
       125
       +
                   {408544, [{408544, []}]}

     

       126
       126
       +
                 ]},

     

       127
       127
       +
                {37106, []},

     

       128
       128
       +
                {821426, [{181282, []}, {349919, []}]}

     

       129
       129
       +
              ]},

     

       130
       130
       +
             {7756031,

     

       131
       131
       +
              [

     

       132
       132
       +
                {6999588,

     

       133
       133
       +
                 [

     

       134
       134
       +
                   {603629, [{244001, []}]},

     

       135
       135
       +
                   {1919401,

     

       136
       136
       +
                    [{159354, []}, {779158, [{68393, []}, {432671, []}]}, {284951, [{284951, []}]}]},

     

       137
       137
       +
                   {1015127, [{744818, [{744818, []}]}, {270309, []}]},

     

       138
       138
       +
                   {3461431,

     

       139
       139
       +
                    [

     

       140
       140
       +
                      {101738, [{101738, [{101738, []}]}]},

     

       141
       141
       +
                      {1781861,

     

       142
       142
       +
                       [{198197, []}, {808768, []}, {774896, [{293633, []}, {188389, []}, {292874, []}]}]},

     

       143
       143
       +
                      {915750, [{316131, []}, {306743, []}, {71772, [{71772, []}]}]}

     

       144
       144
       +
                    ]}

     

       145
       145
       +
                 ]},

     

       146
       146
       +
                {452018, [{358208, [{183686, []}]}]},

     

       147
       147
       +
                {150157, []}

     

       148
       148
       +
              ]}

     

       149
       149
       +
           ]},

     

       150
       150
       +
          {3078860,

     

       151
       151
       +
           [

     

       152
       152
       +
             {2260158,

     

       153
       153
       +
              [

     

       154
       154
       +
                {324522, [{324522, []}]},

     

       155
       155
       +
                {205684, []},

     

       156
       156
       +
                {213872, []},

     

       157
       157
       +
                {466588, [{51223, []}, {397589, []}, {17776, []}]}

     

       158
       158
       +
              ]},

     

       159
       159
       +
             {621970, [{277366, [{277366, []}]}, {69149, []}]},

     

       160
       160
       +
             {196732, []}

     

       161
       161
       +
           ]},

     

       162
       162
       +
          {1738868, [{473075, [{186613, []}, {47133, []}, {44509, []}]}, {278273, []}, {426097, []}]},

     

       163
       163
       +
          {22022022,

     

       164
       164
       +
           [

     

       165
       165
       +
             {17187447,

     

       166
       166
       +
              [

     

       167
       167
       +
                {2018419, [{861586, [{140610, []}]}, {449012, [{127216, []}]}, {521137, [{521137, []}]}]},

     

       168
       168
       +
                {1863430, [{1374035, [{438736, []}, {75020, []}, {105747, []}, {58981, []}]}, {4624, []}]},

     

       169
       169
       +
                {105380, []},

     

       170
       170
       +
                {1941889, [{146536, [{71403, []}]}, {720197, []}, {367058, [{63205, []}, {303853, []}]}]},

     

       171
       171
       +
                {868116, [{247470, []}, {28438, []}, {324132, []}]},

     

       172
       172
       +
                {9893050,

     

       173
       173
       +
                 [

     

       174
       174
       +
                   {8877344,

     

       175
       175
       +
                    [

     

       176
       176
       +
                      {5916357,

     

       177
       177
       +
                       [

     

       178
       178
       +
                         {2898091,

     

       179
       179
       +
                          [

     

       180
       180
       +
                            {454565, [{245558, []}]},

     

       181
       181
       +
                            {448698, []},

     

       182
       182
       +
                            {178036, [{178036, []}]},

     

       183
       183
       +
                            {1581051, [{188814, []}, {691179, []}, {242810, []}, {184707, []}]}

     

       184
       184
       +
                          ]},

     

       185
       185
       +
                         {1496660, [{228293, []}, {704840, [{124604, []}]}]},

     

       186
       186
       +
                         {492253, []},

     

       187
       187
       +
                         {152381, []}

     

       188
       188
       +
                       ]},

     

       189
       189
       +
                      {1706657,

     

       190
       190
       +
                       [

     

       191
       191
       +
                         {725633, [{407244, [{315660, []}]}, {203902, []}]},

     

       192
       192
       +
                         {195811, []},

     

       193
       193
       +
                         {259109, [{46435, [{46435, []}]}, {109187, [{27250, []}]}]}

     

       194
       194
       +
                       ]},

     

       195
       195
       +
                      {436056, [{142366, [{142366, []}]}]}

     

       196
       196
       +
                    ]},

     

       197
       197
       +
                   {336414, [{335058, []}]}

     

       198
       198
       +
                 ]}

     

       199
       199
       +
              ]},

     

       200
       200
       +
             {96506, []},

     

       201
       201
       +
             {928180, [{37528, []}, {283798, [{176794, [{176794, []}]}]}]},

     

       202
       202
       +
             {273935, []},

     

       203
       203
       +
             {119274, []},

     

       204
       204
       +
             {15911, []},

     

       205
       205
       +
             {2980003,

     

       206
       206
       +
              [

     

       207
       207
       +
                {1870823,

     

       208
       208
       +
                 [

     

       209
       209
       +
                   {1584583,

     

       210
       210
       +
                    [

     

       211
       211
       +
                      {345940, [{207755, []}, {138185, []}]},

     

       212
       212
       +
                      {691294, [{189595, [{115955, []}]}, {349982, []}, {151717, []}]},

     

       213
       213
       +
                      {124928, []},

     

       214
       214
       +
                      {221254, []}

     

       215
       215
       +
                    ]}

     

       216
       216
       +
                 ]},

     

       217
       217
       +
                {161906, []},

     

       218
       218
       +
                {521337, []},

     

       219
       219
       +
                {414205, [{185769, [{185769, []}]}]},

     

       220
       220
       +
                {11732, []}

     

       221
       221
       +
              ]}

     

       222
       222
       +
           ]},

     

       223
       223
       +
          {851171, [{8052, []}, {461954, [{208370, []}]}]},

     

       224
       224
       +
          {618943, [{290697, []}, {73533, []}]}

     

       225
       225
       +
        ]}

     

       226
       226
       +
       ```

     

       227
       227
       +
       

     

       228
       228
       +
       ## Task 1

     

       229
       229
       +
       

     

       230
       230
       +
       ```elixir

     

       231
       231
       +
       defmodule DFS do

     

       232
       232
       +
         def size({size, subs}, total \\ 0) do

     

       233
       233
       +
           total =

     

       234
       234
       +
             if size < 100_000 do

     

       235
       235
       +
               total + size

     

       236
       236
       +
             else

     

       237
       237
       +
               total

     

       238
       238
       +
             end

     

       239
       239
       +
       

     

       240
       240
       +
           Enum.reduce(subs, total, &size/2)

     

       241
       241
       +
         end

     

       242
       242
       +
       end

     

       243
       243
       +
       ```

     

       244
       244
       +
       

     

       245
       245
       +
       <!-- livebook:{"output":true} -->

     

       246
       246
       +
       

     

       247
       247
       +
       ```

     

       248
       248
       +
       {:module, DFS, <<70, 79, 82, 49, 0, 0, 8, ...>>, {:size, 2}}

     

       249
       249
       +
       ```

     

       250
       250
       +
       

     

       251
       251
       +
       ```elixir

     

       252
       252
       +
       DFS.size(fs)

     

       253
       253
       +
       ```

     

       254
       254
       +
       

     

       255
       255
       +
       <!-- livebook:{"output":true} -->

     

       256
       256
       +
       

     

       257
       257
       +
       ```

     

       258
       258
       +
       1642503

     

       259
       259
       +
       ```

     

       260
       260
       +
       

     

       261
       261
       +
       ## Task 2

     

       262
       262
       +
       

     

       263
       263
       +
       ```elixir

     

       264
       264
       +
       defmodule DFS2 do

     

       265
       265
       +
         def dirs({size, subs}, needed) do

     

       266
       266
       +
           dirs({size, subs}, needed, size)

     

       267
       267
       +
         end

     

       268
       268
       +
       

     

       269
       269
       +
         defp dirs({size, subs}, needed, curr) do

     

       270
       270
       +
           if size >= needed do

     

       271
       271
       +
             Enum.reduce(subs, min(curr, size), &dirs(&1, needed, &2))

     

       272
       272
       +
           else

     

       273
       273
       +
             curr

     

       274
       274
       +
           end

     

       275
       275
       +
         end

     

       276
       276
       +
       end

     

       277
       277
       +
       ```

     

       278
       278
       +
       

     

       279
       279
       +
       <!-- livebook:{"output":true} -->

     

       280
       280
       +
       

     

       281
       281
       +
       ```

     

       282
       282
       +
       {:module, DFS2, <<70, 79, 82, 49, 0, 0, 8, ...>>, {:dirs, 3}}

     

       283
       283
       +
       ```

     

       284
       284
       +
       

     

       285
       285
       +
       ```elixir

     

       286
       286
       +
       max = 70_000_000

     

       287
       287
       +
       current = 46_592_386

     

       288
       288
       +
       needed = 30_000_000

     

       289
       289
       +
       

     

       290
       290
       +
       left =

     

       291
       291
       +
         (max - current)

     

       292
       292
       +
         |> IO.inspect(label: :left)

     

       293
       293
       +
       

     

       294
       294
       +
       DFS2.dirs(fs, needed - left)

     

       295
       295
       +
       ```

     

       296
       296
       +
       

     

       297
       297
       +
       <!-- livebook:{"output":true} -->

     

       298
       298
       +
       

     

       299
       299
       +
       ```

     

       300
       300
       +
       left: 23407614

     

       301
       301
       +
       ```

     

       302
       302
       +
       

     

       303
       303
       +
       <!-- livebook:{"output":true} -->

     

       304
       304
       +
       

     

       305
       305
       +
       ```

     

       306
       306
       +
       6999588

     

       307
       307
       +
       ```