this repo has no description

ft: add day 06.2022 and day 07.2022

Changed files
+374
2022
+67
2022/day06.livemd
···
+
<!-- livebook:{"persist_outputs":true} -->
+
+
# Day 06
+
+
```elixir
+
Mix.install([
+
{:kino_aoc, git: "https://github.com/ljgago/kino_aoc"}
+
])
+
```
+
+
<!-- livebook:{"output":true} -->
+
+
```
+
:ok
+
```
+
+
## Section
+
+
<!-- livebook:{"attrs":{"day":"6","session_secret":"ADVENT_OF_CODE_SESSION","variable":"puzzle_input","year":"2022"},"kind":"Elixir.KinoAOC.HelperCell","livebook_object":"smart_cell"} -->
+
+
```elixir
+
{:ok, puzzle_input} =
+
KinoAOC.download_puzzle("2022", "6", System.fetch_env!("LB_ADVENT_OF_CODE_SESSION"))
+
```
+
+
<!-- livebook:{"output":true} -->
+
+
```
+
{:ok,
+
"pnnfhnhshrhmhwwmwzmznmnwmwfmfhfjfcjjtgtbggpdgdjjbjrjsjpjrrmddmgmpmddrhddnfnfzfpfvpfpprhhlffmtffqhhdtdcdsswsdwswmmfvvpdprrnnhhhtffnfbbznbznnvdnnbffjrfrbfrbrgbrrntnggrqqwtqwwgjgsswgwqwtwwsvwvbwvwrwlrlppzfzwfzzpmzzhqqzqlzlglzzmrmwrmwwvmwvvnppjfjttlffhjjjsccbggnffqgfgjjnccmdmzmllvnlnznttlvlttvnvgnvvqvmvqqzrqqcgglzzwtztwwmjmzjjnddsffqrqlrrvsvdvldvvlgvlvccdzczcqcpphggtnthhhtbhtttcjtjcjgcjcbbrhbbfrffgjgdgzddcttczzsccbpcpddcpcggmjgjddtcccthccfrccmdmhmddnwddfldffntnptnpttcptcptpfphhmfmwfwmmlblgbgvbvlltqltldttfcfcclgcllmplmlbbjnjzjnzzttnvvgddshddsqddggsqgqddsggdhghjgjhhgchhdmdjmjddgdhghrrphrrpnnqhhjwwqrrcmmslmmszzpgzpzzrmzmznzllnjnnlnbbdvdsdffbpffcmmnznqqcbbzvvjnjvvwqwgqqpnnzwnzwnzwwwlpwpzzfqzfqqwnqnbnfnqnbqqbggqnqdndrrzzlffbbgqgfgrfrqqsddnqnqjjgssqwqwcqcpcrrqppwpjjfnfpffhphwwmcwwznwznnplptlplnlsnlsldslslsffwtwftwtbtdbbjsjcczwwfllwtlwtlwlvwlwrwppsggvcvrrqcrqqvmqvmmbrrsbsfspspjpnnmpmqmcczgzffqmfmtmpppwzppzrpzrzsrrpqrpqpmpvmpvpttbqtqmtmjttqdqgggcppclcjcpcsppctpplpdpcppcmmdzmzddvhvhnhrrldllcwwbnwnssshlhrhthggtmggbjbjwwbvbttjllvrrfggngvngnmmvzzrrmddmcddztztctfccqpcpcqqvqppqcqdcdhhvhssgfgzgwwzmmnssvwwbqbhbnhnphpqqjcqcddfwfttqjtqtlttglljgjbgjgnnsqqvrvffqvqfqbffljjpffssqdsqstqqqldqqmhmsmsqqwtqwqdqgdgjjfbjffgbbrhhqghgppqgpgmpmmfzfhhfrhffgmfggpzgpzzhtzhhlbhhqbbzvvnvqnntptmmbhbdhdwwmjjcnnmsscqcbbtjtvjvwjvvmsmjmtmpmgghttcztzggpddbfbfgbbdsdrsrrqfqjjqfjjhzhtzzmdzzcgzgdzzmvmmfmjmgjmggmppbdppmzpppvfppzhhfsfwfhhpjpmmrjjpssdccjpjpwjppvdpphcpcjcfjfwjfwfjwfjjqcqcwqqqsmmmbbgdgwwpcwwdfdlflrltlgtthfhfjhhlthtddlgdggsjsrrdpdcppgttphpgpwppmpzmmrjmmvjvgvgfglfgllbqlqhllszzlwwhzzdfdcdtctptwtztfzzmjzjtjtrjrcrnrjjmwmnnbddgvgtgsstjsszmpqdmzgqflrbrspjmtzjcrmlzltmhgblghnwqvwwqwzbpnfrpdpblpjgshfccfbjfsnwvvhnjftsdnsgtzzjtzpmtfdvzrhtqpblhwgmqtgpbfvbdmsnrrrvvbstpsznvbbwgjfqjrhdvwvgptpglpfddhddmtglmjlpwlvfpbtbmgbplbzrlpdlvqzcwhbscpszgfstjpfdvfpmljlngrbgrdnnblzqrfpzsdvblpwbtnhdjclldvwvbwcwzfzbdspgwpfqjfbdbrqcshtlvcrdstnzggbwqnzbrfzbpnrtmvpbvdhcvdsdshgtvhfgdzljflppqbwclnvbhbczvrscjhlbgbfvwdjhnjsgmvwhpfgwbbmnndpnglfrmtfdzvqgfjdqfhgrhvpbqndmqnqccgwswwdsqjnbjtjbjdbqgjnmfbdvlnfwbnrdqgvgzzhmmbbdzfdvvpwhpbwbnzdcdpchrwlhfsjnhhjggvplmqggwjdsvjtpnpnqgldjjdcscrdltssjdrpcrfbgbcjfplhzgwbprfcslhpcngtszrghmwhzdqscbfrhzdwcffzvmjrmcjcstfvhplvrsglgsjnjtrpddsdfqjsndjnfmvdhfgdbzzflqhsrrwmrnlpqzmcddqbqvvzgtlztpgjnddtcnbmqsjlhmcszrmcjvwzpptlfqsmpvgnzvrjdwzpdwqgbmdgdtvjlmfczthjbcgfhbqpnmlbmrwwhfptzlbmfdhssznjcvjbmnjtnvzjhzczlrrdnttmmcbnzhqpplzqwgttwrnwfvmnptgqlfrnzvqpjfgrzwmlcwvtptvcvrlsrdwdgqfvffspmdbnnrqjttpqvhvdpbcrvzptwnhhfsqzchmncvttcdgdnlppcfzpmjpvbvqhlvplwvrmmbbggbwttwmvsqjlllsftprsmtmnzjcqfzblrllzgshfljchrjwjlpvhpbrtrsschzltrblgjnbgdnmwdggjhqggntblnhsvfgsbcblhmctbqzqwmhqnjhpzjfqpjdgwpzhczcftfcpdhvzhzccmwmrfrbqshzmtpqgpbbvfqqbjbmvnlnlwjtzrpmhdlffccrqcfgsjfszbrzrfztntchtmgmbhjgmlsqzcbtqqjzzlghtzzqmlnnvsgsvbbjfgqsqbqmqrdzwpwdgbggpdvhvnlzshhntprjdwhnwfvdjzpqgflwrvwgtmfdmfdztcbtfnjdrvgdwwczdgphnvdgrbdchprqldfjrvcsflcmlcmzqvqgsgnzcgmrhccgcmptcdzhbcdgdtppwztfstzqqzqrdzlnzthggjmpcflmbcmdrrjnnpbpqfmjbzqbtsjjgdlmgncbmgspqqvbrvzrdjscpzjsdtcdvsdwqlmwrngttswnrsbqctvhgfnnwblpcqzdmzpfchplslspmghvgcqntmlrfhgpcbpspvfhnvqvglsqzsnsdzddqpbsjhlclslngbwvvgjhwfcncqsmqwbptzvpzlzslsjjjldjpwpfrdlfbjphqcjtsgqdsdfdjhqgdhcppndwmhmmldvvmblcqcqfqhltbcbvrnghjfmtgqwtwljtczvqlnmgscjhqdhnzwhzvzzqnlsrhqvljqpgpwghfqlhjjrrhvnmnnrbnlhdcjctwtlhmhhmhjvcgzdrzmdjrvqzgnsttjdwglgwlcmbcdnjprgfsbbdzzngbqdrvwwwhbtlnnmzqdjttsrrpvlfdqnfhhtdtvmpcjgdwtbnqmwmtszdqfmbhjsjpqqddzfggwjhbtlnqfgcwbjzdtcpcpzgnrmnvwlpgmwfjlpgppdfrfvvjwsfcdqdnpcpjbqsvhttssgptqjghctrbgntlfjzdrfjccsprsjlrrwrzsmnjsqslmpdtrvhlqbnmgpjthpqdqmnvrtzlhhzzfzbrcclpmpcszhbttgrtcpgcpjwpdbfpfvgspsgtvglwthqcmcvmrfmclwlvjlsptfgmtlrnsvjrnfwzhdcsmgztpzfcvzwdztpppvqpvqfpdrsfnlhrbqwrsqjtwjmhnpwmqmpdgdhbtbpfwnmswffdqffdggrdrpmngvpzplmmwlddnhcvjjzqqfsbbtfmzdwnpvbjrshmllczhgvwwcbcbtfrfnplqjwmjlvpwwgfrtffwddwppsgtnlmpvfnhfzcsgjbqbjmbvpnqppsrvwnlzvcmjqgtbzrdsnrgwbfmrvnflgccrssfvcwgllqqbbcthzmbtnsmbzbcczhtzcvmthttpltrtdmgspctvtpvqbhmnnpnjwmhpqclmjsdrbjwvjbtzcjlqbjsvbgdwqzflnwzcfjwtrhjgfshfmwbjfwpnhjsmtpgbpwlfjjnmdlrhchmnfmgmgcrftmwbzshdwbhndgwtjbrrvbwprqppfmgfmfllpcjgrwdmtzddthsjlgjljv\n"}
+
```
+
+
## Task 1
+
+
```elixir
+
index =
+
puzzle_input
+
|> to_charlist()
+
|> Enum.chunk_every(4, 1)
+
|> Enum.find_index(fn chunk -> MapSet.size(MapSet.new(chunk)) == 4 end)
+
+
index + 4
+
```
+
+
<!-- livebook:{"output":true} -->
+
+
```
+
1623
+
```
+
+
## Task 2
+
+
```elixir
+
index =
+
puzzle_input
+
|> to_charlist()
+
|> Enum.chunk_every(14, 1)
+
|> Enum.find_index(fn chunk -> MapSet.size(MapSet.new(chunk)) == 14 end)
+
+
index + 14
+
```
+
+
<!-- livebook:{"output":true} -->
+
+
```
+
3774
+
```
+307
2022/day07.livemd
···
+
<!-- livebook:{"persist_outputs":true} -->
+
+
# Day 07
+
+
```elixir
+
Mix.install([
+
{:kino_aoc, git: "https://github.com/ljgago/kino_aoc"}
+
])
+
```
+
+
<!-- livebook:{"output":true} -->
+
+
```
+
:ok
+
```
+
+
## Section
+
+
<!-- livebook:{"attrs":{"day":"7","session_secret":"ADVENT_OF_CODE_SESSION","variable":"puzzle_input","year":"2022"},"kind":"Elixir.KinoAOC.HelperCell","livebook_object":"smart_cell"} -->
+
+
```elixir
+
{:ok, puzzle_input} =
+
KinoAOC.download_puzzle("2022", "7", System.fetch_env!("LB_ADVENT_OF_CODE_SESSION"))
+
```
+
+
<!-- livebook:{"output":true} -->
+
+
```
+
{:ok,
+
"$ 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" <> ...}
+
```
+
+
```elixir
+
defmodule FS do
+
def cd("/", _), do: []
+
def cd("..", [_ | path]), do: path
+
def cd(dir, path), do: [dir | path]
+
+
def file("dir " <> name, path, fs) do
+
put_in(fs, Enum.reverse([name | path]), %{})
+
end
+
+
def file(entry, path, fs) do
+
[size, name] = String.split(entry, " ", parts: 2)
+
+
put_in(fs, Enum.reverse([name | path]), String.to_integer(size))
+
end
+
+
def squash(fs) do
+
fs
+
|> Map.values()
+
|> Enum.reduce({0, []}, fn
+
fsize, {size, subdirs} when is_integer(fsize) ->
+
{size + fsize, subdirs}
+
+
subdir, {size, subdirs} ->
+
{dsize, _} = subdir = squash(subdir)
+
+
{size + dsize, [subdir | subdirs]}
+
end)
+
end
+
end
+
```
+
+
<!-- livebook:{"output":true} -->
+
+
```
+
{:module, FS, <<70, 79, 82, 49, 0, 0, 12, ...>>, {:squash, 1}}
+
```
+
+
```elixir
+
fs =
+
puzzle_input
+
|> String.split("\n", trim: true)
+
|> Enum.reduce({[], %{}}, fn
+
"$ cd " <> path, {cwd, fs} -> {FS.cd(path, cwd), fs}
+
"$ ls", acc -> acc
+
entry, {cwd, fs} -> {cwd, FS.file(entry, cwd, fs)}
+
end)
+
|> elem(1)
+
|> FS.squash()
+
```
+
+
<!-- livebook:{"output":true} -->
+
+
```
+
{46592386,
+
[
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+
]}
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]}
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+
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+
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+
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+
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+
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{454565, [{245558, []}]},
+
{448698, []},
+
{178036, [{178036, []}]},
+
{1581051, [{188814, []}, {691179, []}, {242810, []}, {184707, []}]}
+
]},
+
{1496660, [{228293, []}, {704840, [{124604, []}]}]},
+
{492253, []},
+
{152381, []}
+
]},
+
{1706657,
+
[
+
{725633, [{407244, [{315660, []}]}, {203902, []}]},
+
{195811, []},
+
{259109, [{46435, [{46435, []}]}, {109187, [{27250, []}]}]}
+
]},
+
{436056, [{142366, [{142366, []}]}]}
+
]},
+
{336414, [{335058, []}]}
+
]}
+
]},
+
{96506, []},
+
{928180, [{37528, []}, {283798, [{176794, [{176794, []}]}]}]},
+
{273935, []},
+
{119274, []},
+
{15911, []},
+
{2980003,
+
[
+
{1870823,
+
[
+
{1584583,
+
[
+
{345940, [{207755, []}, {138185, []}]},
+
{691294, [{189595, [{115955, []}]}, {349982, []}, {151717, []}]},
+
{124928, []},
+
{221254, []}
+
]}
+
]},
+
{161906, []},
+
{521337, []},
+
{414205, [{185769, [{185769, []}]}]},
+
{11732, []}
+
]}
+
]},
+
{851171, [{8052, []}, {461954, [{208370, []}]}]},
+
{618943, [{290697, []}, {73533, []}]}
+
]}
+
```
+
+
## Task 1
+
+
```elixir
+
defmodule DFS do
+
def size({size, subs}, total \\ 0) do
+
total =
+
if size < 100_000 do
+
total + size
+
else
+
total
+
end
+
+
Enum.reduce(subs, total, &size/2)
+
end
+
end
+
```
+
+
<!-- livebook:{"output":true} -->
+
+
```
+
{:module, DFS, <<70, 79, 82, 49, 0, 0, 8, ...>>, {:size, 2}}
+
```
+
+
```elixir
+
DFS.size(fs)
+
```
+
+
<!-- livebook:{"output":true} -->
+
+
```
+
1642503
+
```
+
+
## Task 2
+
+
```elixir
+
defmodule DFS2 do
+
def dirs({size, subs}, needed) do
+
dirs({size, subs}, needed, size)
+
end
+
+
defp dirs({size, subs}, needed, curr) do
+
if size >= needed do
+
Enum.reduce(subs, min(curr, size), &dirs(&1, needed, &2))
+
else
+
curr
+
end
+
end
+
end
+
```
+
+
<!-- livebook:{"output":true} -->
+
+
```
+
{:module, DFS2, <<70, 79, 82, 49, 0, 0, 8, ...>>, {:dirs, 3}}
+
```
+
+
```elixir
+
max = 70_000_000
+
current = 46_592_386
+
needed = 30_000_000
+
+
left =
+
(max - current)
+
|> IO.inspect(label: :left)
+
+
DFS2.dirs(fs, needed - left)
+
```
+
+
<!-- livebook:{"output":true} -->
+
+
```
+
left: 23407614
+
```
+
+
<!-- livebook:{"output":true} -->
+
+
```
+
6999588
+
```