Slightly cleaner parser

230 byte overhead is worth it to avoid conversions and potential
indexing errors

2022/Cargo.toml

@@ -8,6 +8,7 @@ edition = "2021"
 [dependencies]
 anyhow = "1.0.66"
 clap = { version = "4.0.19", features = ["derive"] }
+itertools = "0.10.5"
 nom = "7.1.1"
 
 [dev-dependencies]

2022/benches/days.rs

@@ -8,7 +8,7 @@ use criterion::BenchmarkId;
 use criterion::Criterion;
 
 /// Number of days we have an implementation to benchmark
-const DAYS_IMPLEMENTED: u8 = 2;
+const DAYS_IMPLEMENTED: u8 = 7;
 
 fn read_input(day: u8) -> Vec<u8> {
     let input_path = format!("inputs/{:02}.txt", day);

2022/inputs/03.txt

@@ -0,0 +1,300 @@
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2022/inputs/05.txt

@@ -0,0 +1,514 @@
+        [G]         [D]     [Q]    
+[P]     [T]         [L] [M] [Z]    
+[Z] [Z] [C]         [Z] [G] [W]    
+[M] [B] [F]         [P] [C] [H] [N]
+[T] [S] [R]     [H] [W] [R] [L] [W]
+[R] [T] [Q] [Z] [R] [S] [Z] [F] [P]
+[C] [N] [H] [R] [N] [H] [D] [J] [Q]
+[N] [D] [M] [G] [Z] [F] [W] [S] [S]
+ 1   2   3   4   5   6   7   8   9 
+
+move 7 from 6 to 8
+move 5 from 2 to 6
+move 2 from 4 to 1
+move 1 from 4 to 5
+move 5 from 7 to 6
+move 7 from 6 to 3
+move 5 from 9 to 2
+move 6 from 2 to 3
+move 2 from 7 to 9
+move 20 from 3 to 1
+move 11 from 1 to 6
+move 1 from 9 to 8
+move 3 from 8 to 2
+move 8 from 1 to 5
+move 10 from 8 to 4
+move 7 from 6 to 4
+move 1 from 8 to 3
+move 8 from 1 to 7
+move 16 from 4 to 8
+move 1 from 9 to 8
+move 1 from 5 to 2
+move 4 from 7 to 4
+move 5 from 6 to 7
+move 1 from 6 to 1
+move 8 from 7 to 4
+move 1 from 6 to 9
+move 12 from 4 to 5
+move 3 from 2 to 5
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+move 1 from 4 to 2
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+move 8 from 2 to 7
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+move 1 from 1 to 2
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+move 7 from 5 to 1
+move 9 from 4 to 3
+move 14 from 8 to 4
+move 1 from 8 to 4
+move 1 from 1 to 5
+move 1 from 5 to 2
+move 3 from 2 to 4
+move 1 from 7 to 1
+move 1 from 7 to 3
+move 2 from 1 to 7
+move 3 from 5 to 7
+move 2 from 7 to 6
+move 1 from 6 to 5
+move 3 from 7 to 1
+move 1 from 6 to 8
+move 1 from 8 to 7
+move 1 from 3 to 6
+move 1 from 7 to 1
+move 4 from 1 to 4
+move 6 from 3 to 2
+move 3 from 1 to 2
+move 3 from 3 to 6
+move 3 from 2 to 6
+move 6 from 6 to 5
+move 1 from 1 to 4
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+move 5 from 2 to 1
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+move 2 from 9 to 8
+move 3 from 1 to 5
+move 1 from 9 to 7
+move 25 from 4 to 1
+move 1 from 1 to 7
+move 2 from 8 to 3
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+move 2 from 3 to 5
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+move 4 from 2 to 1
+move 2 from 6 to 7
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+move 4 from 7 to 2
+move 2 from 2 to 3
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+move 4 from 5 to 4
+move 5 from 1 to 4
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+move 22 from 9 to 1
+move 2 from 2 to 7
+move 3 from 2 to 1
+move 6 from 2 to 6
+move 1 from 7 to 1
+move 10 from 5 to 7
+move 15 from 1 to 4
+move 13 from 1 to 5
+move 3 from 6 to 8
+move 1 from 8 to 9

2022/inputs/06.txt

@@ -0,0 +1 @@
+grvrnvrnnjljbjqjpqjjvhhzwwrbwwbblrltrrpbbbbqnnqbbbbsvbvmbvmbbrsrqrzrllwbbbqzqrqnqrnrjnnjccdggwqqhrrjcjmjmllgrlglhlclmlvlvsshwwsggmfmdfddgdfftrrczrcczhzppgdgrdggghmmdwwqgggslglfgfcgccmjcjwjrwjrjcrjjsgjjvddpwpgpbbgwbgwwhnhfftbffhpfphhfqfrqfrfnfpprvrsrhrfrllfhhrsrhssvfsvsnvsnsswtwtlthllrjjwddtggzczgcchwcwppfbbdvdrdzrdrvrwwsbsfbssqfsfjsjcscttlztllgjjlbbdsdtssvvvwlvlqqnhqqtdqtddjcdcjjpbphhgtgtqtzqqzhqqtgtvtmvtvrvqrvvfmfmppzzbwwnddzttfpfrrlddbppfqppnwnswwdhwdwjjqljqqthtnhnddgmgcmgcmgcmmfmfttrzzfdzztllmjlllgcgbbcqcvccpnndbdjbjmmzbztzptzpprpddptpprhhvlvmlmpmmljjnnjsjfjjvgjjvzzfgfzfbftbftttgstgstgtpggflfcfqqtctltgltldlzdlzzmmlddnvddzfddppmnpptzptpvttwstwswvwrvvbfbjjjbmjjdvdvrvdddrwrhrzrqqhghhrwhwhrrmppsgpsgszzdfdfwwmtwtvwvgvffmqqqtqntqnnjcncbnbwnnzggrdrqqjbqjjwjqqqwlqwlwzlljhhfsfsqsrqqhwqqwbbqbvvlflrrlglbbjhhjmhjjcmcjcgczcfcgcqqczcnnvjnnlddmpmcppgvgjgddvrrnsnmnqmqgmmnppwgwcgwgssbddgtdgdgmdgmgvvmjmvmjmvvsfssdgdghdggbfbqbdbjbsbmmrpmrprggbllwrwpwtppzvppzsssdnsdnnvnhvvvzvfzfqqnnmlnltldtdvdbdblddsmmlccmlmvlmvmmcsctctrtsrstsbsrshsddlmddmppgsscttnrtrqqcvcwwlnlznnnvcnvvtnvnbnmbmvmppjgjdjtddmpdmdvvmgvvdqdlqlhhzccsggjdjsdsttctjctjtfjttppdzpzzbjbwwmwbblslzslzszlzrrcbrrfggvcczjjtbbdnnggbwblwlbwlwqqfvfqfddrrfccvlllhmhhhrthrthrrnbnzbbpzplphprrrnbbghhnshnhbblqqqvwwffnmnmhhtccpqpvqvbvnvvfnfsnffdjdllwffcddgcgrgjrggchcpcddtbbdtdmtdmmhhtphtpppclcpcvcjvcjjfqfzqqphpnhnrnhhpdhhtfhhbbmqmfmsmvssgqqfssqgglnnqmnmbnmbbllrdrgdrdvrdvdsvvnddgtgddcdqdsqdqbqqlhhwdhdgdcgcdchchrchhpvvpgvgrrfggwfwgmpddbhfngtrwswfszgsggnpsntjpslrpjqsffzrlnbnzdtqpqtjzwlhhgrsrbvnccnsjmzcbqgcbtbqlzhnpnhhrrvqwjwzzvrlcrmjhcscrqhpqmfzbnvcwwqhcjjlnggmpbwztzfswmsbjshnsgfmdlzvzczhrdwgwbghszpnbfpctrshbfhspsczcqcrrqcpwwpfzhjqtpqgjbztrpzrlgfdjbmlwdvlvnfmdzbwsbbhlbszvwcpztlchjrqbmsftltmqpfgdpmdgjvwqqtjsqlfqrwmsnlqgsbqfwsdnfvzthmbplvszfcmlptlcjpnfpjsphsmmjplwjqphgvzbtbjtpttqhlwtgnrjvmvsfsztmsqszzlhqqhfslsvhzgtsssfctzgsqbgdzlpwbsmpcnjqshhhcwqdsdzdhnjfqzqnqdlrpddcgrgldgqbjmdtwgppdczzrjvmcfqjbpjzbtjmgdphlbwnsnpfdqlhwvvmpwzsrztnwvtlbphljmjwsgbphgmwhdmfhpvsmvsjccjhfvqtvfmmlnggncltvtrgmbtfqsvfnlvcmjnjwzcrpjnsgntvhjbtdlptshbhhchqmsprhqzdnfpjqccdfvnzjtlbsmmwvzlwlvmsbrnhqctvtvbfhntdctjnrbcrrlmsnwbbjbcbbgrrhfqwzwwfgvsvgbwnttghtgpspzwzfhffsqjvwwttntnvlwftsfvtttgnprzrzsghvjrdtsfdvzswhmrfcdqsgvrlhzbnvbmjlqrftnnbtwqtvlvwznfbslhdqjbntdgpprfqchjvgvzjssdztjlzwfljjmfvzrbbtczggzqwrnqqgzzcbqjcpfqfrbwtdjrrvbszsjdjcpdfjscsvnltcgwvqsgnhbfgnfnddnpmbzbptrmvqzpvbdpfdvtlmgnnjwflgdbfnmvsdnmlvgcpwflwvdbtbfwtfpsmqsplnzwlwgvbjrhghwrnrswsggbqpdjcjrgbgnsqdvwzzwftvjqgjzzcdvpbbjzpphmbcqmrjvgqwfgrsnqvhwflmhgrlvbpwdcsrlqwfrwppqbrdhwqtvczpclpsbsjcptgblbbsqmbhjjgzwvlcnhnzcttmpjsgchmppgphqlzlcsqcgbbjgtjjvmttdztfdptzgvmpnqrcmpmcdlpnbztllvqbggqbqhlqvdwsrwzsjwfrqvcbvsgfdptmrzpvdfblmhlzrvpmsljlqqzrhlnmwncpfhvqlsbtrjbfcrnfvjvddrhdbbczjdsrdvzlbqrccssdzcpmdsqbprjppfzdwfdswptgzcmjqfhcwsqfqhvrslffqfbcvhdzljzrmtwmfdwzdhhjcmbjtvjhzzwfqhrcslztdbnlwmmhbbbgdscjcdzftnchqfnflnsdqjscfrqpnfbftpzvtmrwncqfqqflschpfnjsjlqcjdjgtwpqhgcnjdmnnvmmpwdspmnrgqrptqwcvbtdwpqlbtwpqgwgfrzlrhtvrvzhmhmwhfdsrhpcczqfltsgtgrfwcvlcvtlhqqwnrqgzpnzbfmzbdwqwbsfvbshrgzqdbgvrhzhzlbqsfzttmsnmrqmwgtzbvdqdrbgcpclzjrhdbjtpcdbbznjgtbwbqrnpvffdmwtrbhhstcmnjcwbbnmpbvmjprtzgcptmtrffwhvfgdljnrbbrblbfbgdwtjrtgqgrpvpgjqrjzczvvlspgdbzftqgqvgdqlglbgvgjdcztznszcwfqhmwbrbjcfstzdcmdsssqfhtzpdgmzjscvbdzgbhhgdqgvfwrzmhdrhlsvlzjjzbzdljcbhncppwrtptjgszlqsrqpzqcsgvdvzmgvwgsncnbffttslphcstqvfwbwzbflmshcbnhpljgqwmmwwzlgpbcqnrtqlwcjcrclfdrnnmvtbfdztdfvtqrsgdptfcfpzpsldhzmrngggfvdqggtlfqqwsldprcffsstnnpmsbbvghdbpprqbssnprdbqclzqtgsrczwcvqwrrfmmfwsndvtvqljwwglrgbphdvvwgctbbmtrbpzqtspgrlhmnhjcdwhwvssgspzjbcfjttjqbdpdmptfzzjcfqljpqddfssmffqprvbptfvdshsdmfmdtmlbnmbmjjjsgmlmwmgcwhbrbgchrstptvdlqgddfzddlzhwjmsvvcjwvqtzjtsctfmzchlbrvlgdzbvdlbfpvhptpltrdmcgjghcpwvwqqnrzdtnmgdncplhdpsgpnbprbgshffwwsdhpgqsbmwdtpnhhltlcqfrjtswcchzvlhdgrmjwhgwppdjqlgmdhwbllqvzrchgclmqdlghjsvmwlflmhhmdzbfjhjnvwphnjbclmdpgflqgtfsmsjslntfcmtbphnrgpdcqtjzjttdtgjmvhzsrfnrjqssvwpcslpfstbpfsrsntmftmdgsqrrsnddqfmchrhtlhmqndvvllnvltdzfphjqnvmcdsgfpcmjftgdpntjzplqljhtthvnbzbzwvfnqsjvnfwhmtbsspjslgfjvdgfjpwrsgqwntntjcqtdgnhnsfwhhqfwbwhdrftj

2022/inputs/07.txt

@@ -0,0 +1,983 @@
+$ cd /
+$ ls
+dir gqcclj
+dir lmtpm
+dir nhqwt
+dir qcq
+dir vwqwlqrt
+$ cd gqcclj
+$ ls
+62425 dqp.gjm
+174181 hrtw.qsd
+273712 pflp.mdw
+169404 zlthnlhf.mtn
+180878 zprprf
+$ cd ..
+$ cd lmtpm
+$ ls
+dir clffsvcw
+163587 cvcl.jqh
+dir dcqnblb
+dir dtpwln
+dir fvt
+dir hrcrw
+dir jdqzmqn
+236754 nrdmlj
+205959 pflp.mdw
+dir qcq
+dir rsn
+129926 vdgcqdn.sqd
+dir zprprf
+$ cd clffsvcw
+$ ls
+6997 dcqnblb.wbh
+145711 dqp
+159225 pflp.mdw
+$ cd ..
+$ cd dcqnblb
+$ ls
+dir dcqnblb
+dir gfn
+dir lpswsp
+dir lvt
+dir zprprf
+$ cd dcqnblb
+$ ls
+2020 grpdmd.ggz
+dir zpswzfvg
+$ cd zpswzfvg
+$ ls
+206998 zprprf.gnw
+$ cd ..
+$ cd ..
+$ cd gfn
+$ ls
+277530 rhbvtblc.mvw
+$ cd ..
+$ cd lpswsp
+$ ls
+173180 dcqnblb
+$ cd ..
+$ cd lvt
+$ ls
+dir hjllwsvl
+dir ptbt
+$ cd hjllwsvl
+$ ls
+dir wqnc
+$ cd wqnc
+$ ls
+64695 grpdmd.ggz
+$ cd ..
+$ cd ..
+$ cd ptbt
+$ ls
+150880 vvbt.gtp
+$ cd ..
+$ cd ..
+$ cd zprprf
+$ ls
+dir ldzslndn
+dir qftt
+$ cd ldzslndn
+$ ls
+dir bwqqsbhg
+129454 vbn
+$ cd bwqqsbhg
+$ ls
+108701 zprprf.gss
+$ cd ..
+$ cd ..
+$ cd qftt
+$ ls
+64268 cvcl.jqh
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd dtpwln
+$ ls
+196215 cvcl.jqh
+dir dpwg
+dir ldzslndn
+dir znnsqqh
+$ cd dpwg
+$ ls
+192388 gmh
+47754 grgzh.qdl
+99449 hqsh
+dir pbmf
+50061 pflp.mdw
+192902 qcq.pgg
+dir rmpvj
+dir scgc
+$ cd pbmf
+$ ls
+210083 wpfnwbl.mgf
+$ cd ..
+$ cd rmpvj
+$ ls
+125738 nmlnbvrd
+226214 zprprf.jnp
+114257 zprprf.srs
+$ cd ..
+$ cd scgc
+$ ls
+182115 rrc.rcc
+$ cd ..
+$ cd ..
+$ cd ldzslndn
+$ ls
+201992 qcrm.cpd
+$ cd ..
+$ cd znnsqqh
+$ ls
+85635 cvcl.jqh
+$ cd ..
+$ cd ..
+$ cd fvt
+$ ls
+dir dcqnblb
+dir gnc
+75864 vfn
+$ cd dcqnblb
+$ ls
+dir dcqnblb
+dir lbnflwsh
+$ cd dcqnblb
+$ ls
+269901 cvcl.jqh
+$ cd ..
+$ cd lbnflwsh
+$ ls
+33336 grpdmd.ggz
+42861 phg.wmc
+$ cd ..
+$ cd ..
+$ cd gnc
+$ ls
+dir jhjbjsp
+dir jjppr
+$ cd jhjbjsp
+$ ls
+96177 ldzslndn
+$ cd ..
+$ cd jjppr
+$ ls
+181016 dqp
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd hrcrw
+$ ls
+261376 dtjfpppr.dww
+54658 vsrgvw.pfn
+$ cd ..
+$ cd jdqzmqn
+$ ls
+52342 dcpndc.vlg
+171946 gggpchh.tbb
+dir ldzslndn
+11156 nbfrfvv.gzw
+$ cd ldzslndn
+$ ls
+107873 cvcl.jqh
+216034 gfdjrbz
+68844 pqllfrrh.jcf
+$ cd ..
+$ cd ..
+$ cd qcq
+$ ls
+152886 ldzslndn.ltn
+105125 vwplh.vbf
+$ cd ..
+$ cd rsn
+$ ls
+15385 hqcmjdgv.jjv
+105735 qcq.bzg
+58805 snczcsp
+26668 vbn
+$ cd ..
+$ cd zprprf
+$ ls
+dir chbmq
+dir dcqnblb
+dir dqp
+dir nfspb
+89506 zprprf.hnt
+$ cd chbmq
+$ ls
+dir cnjvw
+dir dqp
+151434 frsvrdnt
+dir msztjvcb
+240689 qcq.jlh
+dir sjzrcg
+97312 vnr.zfr
+dir zprprf
+$ cd cnjvw
+$ ls
+dir bpbs
+252403 cqhtshc
+dir djmjhn
+10935 fhqmswr
+6582 pdwml.ldd
+dir qcq
+219282 rfmd
+$ cd bpbs
+$ ls
+147582 bnhwsnsj.gdm
+61362 cvcl.jqh
+152857 vdgcqdn.sqd
+$ cd ..
+$ cd djmjhn
+$ ls
+dir bjdbcjbb
+dir dcqnblb
+dir dqp
+dir lgdwtt
+$ cd bjdbcjbb
+$ ls
+110710 cvcl.jqh
+252792 hmshctr.lgz
+dir mjhtmbj
+189745 shsswcgr
+dir tfnhp
+194940 vbn
+dir zprprf
+$ cd mjhtmbj
+$ ls
+dir dqp
+dir hbthpcmb
+$ cd dqp
+$ ls
+200832 sbcrz.qgw
+$ cd ..
+$ cd hbthpcmb
+$ ls
+55191 ffcntg
+$ cd ..
+$ cd ..
+$ cd tfnhp
+$ ls
+276825 dqp
+161538 gqmr.wgb
+$ cd ..
+$ cd zprprf
+$ ls
+287638 dcqnblb.ssp
+41274 hgmrvj.mwf
+249118 sbb.gsf
+105141 wwrg.gqz
+$ cd ..
+$ cd ..
+$ cd dcqnblb
+$ ls
+1957 btmmc
+32386 dtzbzg.dhm
+dir mmrbj
+98283 ntmhfgtl.pmf
+dir zprprf
+$ cd mmrbj
+$ ls
+273194 wnsq
+251527 zprprf
+$ cd ..
+$ cd zprprf
+$ ls
+27678 ldzslndn.rrl
+62866 ljf.fdj
+148502 qcq.dlg
+dir rvgqvm
+179231 tllnmhn.pjp
+64033 vbn
+dir zcdrj
+$ cd rvgqvm
+$ ls
+dir ntbv
+262324 prhgj.szz
+dir qbvdh
+$ cd ntbv
+$ ls
+116608 cgv.fvj
+175200 swpswq.twt
+$ cd ..
+$ cd qbvdh
+$ ls
+160353 sdhfrb.wjn
+$ cd ..
+$ cd ..
+$ cd zcdrj
+$ ls
+283262 ctl
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd dqp
+$ ls
+dir jfzm
+111438 rdrgb.mjf
+64194 wgtmqrq
+dir zprprf
+$ cd jfzm
+$ ls
+158774 pflp.mdw
+$ cd ..
+$ cd zprprf
+$ ls
+215264 sgsstcp
+$ cd ..
+$ cd ..
+$ cd lgdwtt
+$ ls
+dir qcq
+$ cd qcq
+$ ls
+165461 ldzslndn.vvb
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd qcq
+$ ls
+dir dpd
+165044 grpdmd.ggz
+82343 ldzslndn
+dir mwg
+176689 psjcwp.wct
+44404 qcq.zwd
+$ cd dpd
+$ ls
+84087 dqp
+227386 zprprf.gfs
+$ cd ..
+$ cd mwg
+$ ls
+214086 pflp.mdw
+dir sjjsdn
+225859 wcdt
+158892 zprprf.frs
+$ cd sjjsdn
+$ ls
+260121 gplgp.dfn
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd dqp
+$ ls
+dir hcrwclpg
+dir zphd
+$ cd hcrwclpg
+$ ls
+dir cmqntjj
+16393 ldzslndn.qbm
+91152 qqdtc.zdq
+$ cd cmqntjj
+$ ls
+272266 ldzslndn.pll
+$ cd ..
+$ cd ..
+$ cd zphd
+$ ls
+165711 chftwcsw.fqw
+256871 cvcl.jqh
+251168 zprprf.gfv
+$ cd ..
+$ cd ..
+$ cd msztjvcb
+$ ls
+206231 brzn.lmn
+dir dcqnblb
+21571 dqp
+dir fmn
+45779 mlfctz.cjr
+288827 pflp.mdw
+220578 qcq.fqf
+$ cd dcqnblb
+$ ls
+198121 ghbwgs
+93681 nmqhl.vpq
+$ cd ..
+$ cd fmn
+$ ls
+29407 mdfws.qvs
+$ cd ..
+$ cd ..
+$ cd sjzrcg
+$ ls
+155120 ddclvsjr.rpq
+136029 ldzslndn.dcm
+dir vhzh
+$ cd vhzh
+$ ls
+212446 vbn
+$ cd ..
+$ cd ..
+$ cd zprprf
+$ ls
+240335 crt.gqh
+185363 gnmm.qgh
+dir ldzslndn
+dir nwl
+dir qll
+277043 vbn
+217796 vtvgpdl.vtm
+$ cd ldzslndn
+$ ls
+273570 cvcl.jqh
+68510 fgdmz.hrc
+dir npq
+dir swjrzzrm
+$ cd npq
+$ ls
+97923 dzcjsqwt
+$ cd ..
+$ cd swjrzzrm
+$ ls
+180599 tmpgn.bjf
+$ cd ..
+$ cd ..
+$ cd nwl
+$ ls
+171833 dlwrfhh.qgn
+$ cd ..
+$ cd qll
+$ ls
+219926 dcqnblb.bvn
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd dcqnblb
+$ ls
+dir lvpb
+276198 tbgcm.qct
+$ cd lvpb
+$ ls
+142590 bvhjlld
+268259 gnjfg.sgb
+dir qcq
+206220 qcq.zsg
+258137 rrsw.dnb
+dir tmr
+215549 vbn
+$ cd qcq
+$ ls
+dir mmpgd
+dir tdsz
+dir tmfvsjwc
+$ cd mmpgd
+$ ls
+70793 jwbnpwnn
+$ cd ..
+$ cd tdsz
+$ ls
+246310 tdvrhhg.bzq
+$ cd ..
+$ cd tmfvsjwc
+$ ls
+103899 grpdmd.ggz
+287850 ldzslndn
+125930 llhr
+$ cd ..
+$ cd ..
+$ cd tmr
+$ ls
+83344 fbtfcg.hqp
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd dqp
+$ ls
+dir lbgmcbv
+dir nbg
+$ cd lbgmcbv
+$ ls
+81776 wzdzzdp
+$ cd ..
+$ cd nbg
+$ ls
+dir mfsgjp
+155574 pflp.mdw
+$ cd mfsgjp
+$ ls
+199400 vdgcqdn.sqd
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd nfspb
+$ ls
+262412 csrdtbs
+73867 vbn
+136389 zqps.hjt
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd nhqwt
+$ ls
+123766 cvcl.jqh
+dir dhrtvctp
+222086 grpdmd.ggz
+dir gzg
+26005 lhpmz.tgz
+dir mcnjwwfr
+117122 msn.gst
+$ cd dhrtvctp
+$ ls
+224079 vdgcqdn.sqd
+$ cd ..
+$ cd gzg
+$ ls
+124395 dqp
+dir wqdbtqm
+$ cd wqdbtqm
+$ ls
+237354 pflp.mdw
+212019 vdgcqdn.sqd
+$ cd ..
+$ cd ..
+$ cd mcnjwwfr
+$ ls
+92504 cshdztf
+dir dctl
+dir dqp
+dir flcrmhlj
+161879 grpdmd.ggz
+dir gtt
+dir hlbnhchz
+220093 mdtdsgvm.zgg
+dir twntr
+287192 vbn
+$ cd dctl
+$ ls
+dir bbhch
+155396 hrrj.jzm
+164971 pblqmwj.vdb
+dir wnlgfpvf
+$ cd bbhch
+$ ls
+dir dpqtp
+dir jvdrcw
+$ cd dpqtp
+$ ls
+174135 gwb.qrb
+$ cd ..
+$ cd jvdrcw
+$ ls
+215993 dcqnblb.cqp
+200800 stjttf.ngc
+$ cd ..
+$ cd ..
+$ cd wnlgfpvf
+$ ls
+135978 cvcl.jqh
+dir dqp
+54018 lbrfmt
+$ cd dqp
+$ ls
+270516 dcqnblb.jqw
+dir dqp
+144626 grpdmd.ggz
+157731 hvcv.rhp
+133773 lnnt
+76250 vdgcqdn.sqd
+$ cd dqp
+$ ls
+41504 zprprf.cmc
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd dqp
+$ ls
+dir dqp
+dir ldzslndn
+236737 mqzcvm.fjh
+239746 nhcdz.ncj
+dir rpchqq
+248824 vdgcqdn.sqd
+250937 zrchht.mwg
+$ cd dqp
+$ ls
+203381 qcq.djm
+$ cd ..
+$ cd ldzslndn
+$ ls
+dir dqp
+dir fptnzlv
+dir gmbnpm
+dir vhvblt
+$ cd dqp
+$ ls
+19579 qcq.lhg
+$ cd ..
+$ cd fptnzlv
+$ ls
+209930 dcqnblb
+$ cd ..
+$ cd gmbnpm
+$ ls
+dir ldzslndn
+dir qcq
+$ cd ldzslndn
+$ ls
+11075 pflp.mdw
+$ cd ..
+$ cd qcq
+$ ls
+dir tdp
+$ cd tdp
+$ ls
+40741 vdgcqdn.sqd
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd vhvblt
+$ ls
+dir lzr
+$ cd lzr
+$ ls
+62245 gbnj.llg
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd rpchqq
+$ ls
+dir bcs
+dir dcqnblb
+dir fvjzn
+dir lrphzrv
+$ cd bcs
+$ ls
+179794 bbn.dzb
+242069 cmjdmzjf.zgf
+1703 cvcl.jqh
+dir gnmhwj
+dir ldzslndn
+152520 qltpsz.jsj
+dir sqqjfps
+$ cd gnmhwj
+$ ls
+dir gvs
+201600 hptn.ftf
+dir hzrnb
+dir qcq
+dir sqhl
+$ cd gvs
+$ ls
+152358 zprprf.mlh
+$ cd ..
+$ cd hzrnb
+$ ls
+94290 gplsfd
+$ cd ..
+$ cd qcq
+$ ls
+91909 vmqd.bmg
+$ cd ..
+$ cd sqhl
+$ ls
+238673 vdgcqdn.sqd
+262885 zmdvr.nfg
+$ cd ..
+$ cd ..
+$ cd ldzslndn
+$ ls
+240461 mdz
+84303 qtj
+$ cd ..
+$ cd sqqjfps
+$ ls
+88753 fwn.tff
+$ cd ..
+$ cd ..
+$ cd dcqnblb
+$ ls
+dir dqp
+189996 dqp.pvp
+$ cd dqp
+$ ls
+dir qvfjz
+196506 vbn
+$ cd qvfjz
+$ ls
+209316 pflp.mdw
+107459 rwpbh.vpt
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd fvjzn
+$ ls
+241464 cvcl.jqh
+dir dqp
+dir ldzslndn
+dir msp
+125 pflp.mdw
+131895 vbn
+$ cd dqp
+$ ls
+34019 pflp.mdw
+202957 vbn
+$ cd ..
+$ cd ldzslndn
+$ ls
+147492 cvcl.jqh
+248719 spc.rfv
+$ cd ..
+$ cd msp
+$ ls
+184407 cvcl.jqh
+$ cd ..
+$ cd ..
+$ cd lrphzrv
+$ ls
+dir bbwqmbg
+81858 cvcl.jqh
+dir dqp
+248670 gqqsww.tsn
+199141 grpdmd.ggz
+dir ldzslndn
+34514 ldzslndn.ctw
+dir tln
+214615 zprprf.fwm
+$ cd bbwqmbg
+$ ls
+129750 flf
+dir pvlw
+dir qcq
+126 sqcqphz.tbm
+$ cd pvlw
+$ ls
+198005 jfvj.hdv
+$ cd ..
+$ cd qcq
+$ ls
+dir wgdzws
+$ cd wgdzws
+$ ls
+253522 ldzslndn.qwt
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd dqp
+$ ls
+281993 cvcl.jqh
+dir hwqjlwcb
+50532 msccz.qgm
+102187 trv.tnq
+111 wplnmj.bfl
+$ cd hwqjlwcb
+$ ls
+267580 dhjqb.dsb
+153195 ldzslndn.jqv
+41526 mvwcwc.zsc
+$ cd ..
+$ cd ..
+$ cd ldzslndn
+$ ls
+58666 cvcl.jqh
+79950 dqp.tmc
+242217 hns.lrb
+dir njswzh
+240692 vdgcqdn.sqd
+dir zvmjvcdm
+52909 zzh
+$ cd njswzh
+$ ls
+149732 cvcl.jqh
+dir rnmfd
+$ cd rnmfd
+$ ls
+75368 dqp.hmv
+14350 vbn
+$ cd ..
+$ cd ..
+$ cd zvmjvcdm
+$ ls
+dir jgczt
+$ cd jgczt
+$ ls
+dir qcq
+95941 qzvvwshv.jwc
+$ cd qcq
+$ ls
+273942 pflp.mdw
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd tln
+$ ls
+dir bmcng
+1518 lrg
+dir vnjfrhp
+$ cd bmcng
+$ ls
+38917 fqcrt
+$ cd ..
+$ cd vnjfrhp
+$ ls
+dir dcqnblb
+dir dqp
+247186 grpdmd.ggz
+dir ldzslndn
+169216 pflp.mdw
+206487 vdgcqdn.sqd
+16976 vlsrzjmb.mmc
+257938 wjl
+$ cd dcqnblb
+$ ls
+dir dqp
+$ cd dqp
+$ ls
+184133 qcq
+$ cd ..
+$ cd ..
+$ cd dqp
+$ ls
+dir dcqnblb
+31612 dqp.pnt
+212283 ldzslndn
+61600 vdbfc.ddj
+197189 wpv.wff
+$ cd dcqnblb
+$ ls
+62412 tfzllmrj
+dir zprprf
+$ cd zprprf
+$ ls
+dir bqnpsl
+dir dszrvpzc
+$ cd bqnpsl
+$ ls
+261548 spbsbbsw.cmn
+$ cd ..
+$ cd dszrvpzc
+$ ls
+188232 sggpqslr.smn
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ldzslndn
+$ ls
+dir bgnhd
+dir pgvcdzwz
+dir qgzhm
+$ cd bgnhd
+$ ls
+56989 cvcl.jqh
+$ cd ..
+$ cd pgvcdzwz
+$ ls
+110034 qhgnndv
+$ cd ..
+$ cd qgzhm
+$ ls
+247232 grpdmd.ggz
+269292 ldzslndn
+153843 tpz
+dir vnschqwr
+162392 wnq.btb
+$ cd vnschqwr
+$ ls
+43005 fvtvzfqm.jvc
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd flcrmhlj
+$ ls
+245668 dcqnblb.sdj
+dir lffj
+229909 pflp.mdw
+280176 vbn
+$ cd lffj
+$ ls
+116451 jmzz.jdd
+dir pjlwb
+162815 pmhlqq.snr
+226183 zffth
+$ cd pjlwb
+$ ls
+67518 qcq.hjq
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd gtt
+$ ls
+52105 grpdmd.ggz
+126869 zprprf.fgj
+$ cd ..
+$ cd hlbnhchz
+$ ls
+3064 dqp.lrw
+278756 grpdmd.ggz
+177208 ldzslndn.wlv
+141685 vbn
+$ cd ..
+$ cd twntr
+$ ls
+63747 cvcl.jqh
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd qcq
+$ ls
+226858 cwblp.zgp
+dir jjqsmfhr
+dir rjbqtrq
+dir vwmpnbts
+141715 wdbhdch
+286381 zprprf
+$ cd jjqsmfhr
+$ ls
+dir btmm
+dir fqndtlgq
+$ cd btmm
+$ ls
+4031 dqp.lrr
+dir fzdd
+$ cd fzdd
+$ ls
+dir vnwpn
+$ cd vnwpn
+$ ls
+dir bzlgsl
+dir ztvzrrbv
+$ cd bzlgsl
+$ ls
+9294 ldzslndn.sqr
+$ cd ..
+$ cd ztvzrrbv
+$ ls
+256017 cvcl.jqh
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd ..
+$ cd fqndtlgq
+$ ls
+271528 ccbmgp.bwd
+$ cd ..
+$ cd ..
+$ cd rjbqtrq
+$ ls
+122150 ldzslndn
+46467 tpdvp.pjf
+$ cd ..
+$ cd vwmpnbts
+$ ls
+47518 fcrwfzvm
+263343 gmc.lrt
+212764 qcq
+$ cd ..
+$ cd ..
+$ cd vwqwlqrt
+$ ls
+dir psrs
+$ cd psrs
+$ ls
+281998 zprprf.hml

2022/src/common.rs

@@ -1,6 +1,7 @@
 //! Common helper utilities to all days
 
 use anyhow::Result;
+use nom::combinator::map;
 use nom::error::ErrorKind;
 use nom::error::ParseError;
 use nom::Finish;
@@ -92,3 +93,26 @@ where
         }
     }
 }
+
+/// Add an index to repeated successful invocations of the embedded parser.
+pub fn enumerate<I, O, E>(f: impl Parser<I, O, E>) -> impl FnMut(I) -> IResult<I, (usize, O), E> {
+    let mut index = 0usize;
+
+    map(f, move |v| {
+        let res = (index, v);
+        index += 1;
+        res
+    })
+}
+
+/// Return the minimum and maximum of two unordered variables
+pub fn minmax<T>(a: T, b: T) -> (T, T)
+where
+    T: PartialOrd,
+{
+    if a < b {
+        (a, b)
+    } else {
+        (b, a)
+    }
+}

2022/src/day01.rs

@@ -2,7 +2,6 @@ use std::ops::Add;
 
 use anyhow::Result;
 use nom::character::complete::newline;
-use nom::combinator::opt;
 use nom::multi::separated_list0;
 use nom::sequence::terminated;
 use nom::IResult;
@@ -14,13 +13,9 @@ fn parse_elf(input: &[u8]) -> IResult<&[u8], i32> {
     reduce_many1(terminated(nom::character::complete::i32, newline), Add::add)(input)
 }
 
-fn parse_max(input: &[u8]) -> IResult<&[u8], i32> {
-    reduce_many1(terminated(parse_elf, opt(newline)), Ord::max)(input)
-}
-
 pub fn part1(input: &[u8]) -> Result<String> {
-    let result = parse_input(input, parse_max)?.to_string();
+    let elves = parse_input(input, parse_elf_list)?;
-    Ok(result)
+    Ok(elves.into_iter().fold(0, Ord::max).to_string())
 }
 
 fn parse_elf_list(input: &[u8]) -> IResult<&[u8], Vec<i32>> {

2022/src/day02.rs

@@ -1,15 +1,12 @@
-use std::ops::Add;
-
 use anyhow::Result;
 use nom::character::complete::newline;
-use nom::combinator::map;
 use nom::combinator::map_res;
+use nom::multi::many0;
 use nom::sequence::separated_pair;
 use nom::sequence::terminated;
 use nom::IResult;
 
 use crate::common::parse_input;
-use crate::common::reduce_many1;
 
 #[derive(Copy, Clone, Eq, PartialEq)]
 enum Rps {
@@ -73,7 +70,7 @@ impl TryFrom<u8> for Rps {
     }
 }
 
-fn parse_line(input: &[u8]) -> IResult<&[u8], (Rps, Rps)> {
+fn parse_plan(input: &[u8]) -> IResult<&[u8], Vec<(Rps, Rps)>> {
     fn parse_rps(input: &[u8]) -> IResult<&[u8], Rps> {
         // Note: alpha1 also sort of works but is significantly slower
         map_res(nom::bytes::complete::take(1usize), |v: &[u8]| {
@@ -81,34 +78,33 @@ fn parse_line(input: &[u8]) -> IResult<&[u8], (Rps, Rps)> {
         })(input)
     }
 
-    terminated(
+    fn parse_line(input: &[u8]) -> IResult<&[u8], (Rps, Rps)> {
-        separated_pair(parse_rps, nom::character::complete::char(' '), parse_rps),
+        separated_pair(parse_rps, nom::character::complete::char(' '), parse_rps)(input)
-        newline,
+    }
-    )(input)
+
+    many0(terminated(parse_line, newline))(input)
 }
 
 pub fn part1(input: &[u8]) -> Result<String> {
-    parse_input(
+    let plan = parse_input(input, parse_plan)?;
-        input,
+
-        reduce_many1(
+    let result: u32 = plan
-            map(parse_line, |(them, us)| us.score() + us.score_against(them)),
+        .into_iter()
-            Add::add,
+        .map(|(them, us)| us.score() + us.score_against(them))
-        ),
+        .sum();
-    )
+
-    .map(|sum| sum.to_string())
+    Ok(result.to_string())
 }
 
 pub fn part2(input: &[u8]) -> Result<String> {
-    parse_input(
+    let plan = parse_input(input, parse_plan)?;
-        input,
+
-        reduce_many1(
+    let result: u32 = plan
-            map(parse_line, |(them, us)| {
+        .into_iter()
-                us.score_result() + us.needed(them).score()
+        .map(|(them, us)| us.score_result() + us.needed(them).score())
-            }),
+        .sum();
-            Add::add,
+
-        ),
+    Ok(result.to_string())
-    )
-    .map(|sum| sum.to_string())
 }
 
 #[cfg(test)]

2022/src/day03.rs

@@ -1,9 +1,79 @@
 use anyhow::Result;
+use itertools::Itertools;
 
-pub fn part1(_input: &[u8]) -> Result<String> {
+fn priority(item: u8) -> u32 {
-    todo!()
+    match item {
+        b'a'..=b'z' => item - b'a' + 1,
+        b'A'..=b'Z' => item - b'A' + 27,
+        _ => 0,
+    }
+    .into()
 }
 
-pub fn part2(_input: &[u8]) -> Result<String> {
+fn seen(backpack: &[u8]) -> u64 {
-    todo!()
+    let mut seen = 0;
+
+    for &b in backpack {
+        seen |= 1 << priority(b);
+    }
+
+    seen
+}
+
+pub fn part1(input: &[u8]) -> Result<String> {
+    let mut total = 0;
+
+    for line in input.split(|&b| b == b'\n') {
+        let (first, last) = line.split_at(line.len() / 2);
+
+        let seen = seen(first);
+
+        for &b in last {
+            let prio = priority(b);
+
+            if (seen & (1 << prio)) != 0 {
+                total += prio;
+                break;
+            }
+        }
+    }
+
+    Ok(total.to_string())
+}
+
+pub fn part2(input: &[u8]) -> Result<String> {
+    let mut total = 0;
+
+    for chunk in &input.split(|&b| b == b'\n').chunks(3) {
+        let mut mask = u64::MAX;
+
+        for backpack in chunk {
+            let seen = seen(backpack);
+            mask &= seen;
+        }
+
+        if mask != 0 {
+            debug_assert_eq!(1, mask.count_ones());
+            total += mask.trailing_zeros();
+        }
+    }
+
+    Ok(total.to_string())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    const SAMPLE: &[u8] = include_bytes!("samples/03.txt");
+
+    #[test]
+    fn sample_part1() {
+        assert_eq!(part1(SAMPLE).unwrap(), "157")
+    }
+
+    #[test]
+    fn sample_part2() {
+        assert_eq!(part2(SAMPLE).unwrap(), "70")
+    }
 }

2022/src/day04.rs

@@ -1,9 +1,86 @@
 use anyhow::Result;
+use nom::bytes::complete::tag;
+use nom::character::complete::newline;
+use nom::combinator::map;
+use nom::multi::many0;
+use nom::sequence::separated_pair;
+use nom::sequence::terminated;
+use nom::IResult;
 
-pub fn part1(_input: &[u8]) -> Result<String> {
+use crate::common::minmax;
-    todo!()
+use crate::common::parse_input;
+
+#[derive(Copy, Clone, PartialOrd, PartialEq)]
+struct Assignment(u32, u32);
+
+impl Assignment {
+    fn one_contains(self, other: Self) -> bool {
+        let (first, second) = minmax(self, other);
+
+        if second.0 == first.0 {
+            first.1 <= second.1
+        } else {
+            second.0 <= first.1 && second.1 <= first.1
+        }
+    }
+
+    fn one_overlaps(self, other: Self) -> bool {
+        let (first, second) = minmax(self, other);
+
+        if second.0 == first.0 {
+            first.1 <= second.1
+        } else {
+            second.0 <= first.1
+        }
+    }
 }
 
-pub fn part2(_input: &[u8]) -> Result<String> {
+fn parse_assignments(input: &[u8]) -> IResult<&[u8], Vec<(Assignment, Assignment)>> {
-    todo!()
+    use nom::character::complete::u32;
+
+    fn parse_single(input: &[u8]) -> IResult<&[u8], Assignment> {
+        map(separated_pair(u32, tag("-"), u32), |(start, end)| {
+            Assignment(start, end)
+        })(input)
+    }
+
+    let parse_line = separated_pair(parse_single, tag(","), parse_single);
+
+    many0(terminated(parse_line, newline))(input)
+}
+
+fn parts_common(input: &[u8], filter: impl Fn(Assignment, Assignment) -> bool) -> Result<String> {
+    let assigments = parse_input(input, parse_assignments)?;
+
+    let overlapping = assigments
+        .into_iter()
+        .filter(|&(a, b)| filter(a, b))
+        .count();
+
+    Ok(overlapping.to_string())
+}
+
+pub fn part1(input: &[u8]) -> Result<String> {
+    parts_common(input, Assignment::one_contains)
+}
+
+pub fn part2(input: &[u8]) -> Result<String> {
+    parts_common(input, Assignment::one_overlaps)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    const SAMPLE: &[u8] = include_bytes!("samples/04.txt");
+
+    #[test]
+    fn sample_part1() {
+        assert_eq!(part1(SAMPLE).unwrap(), "2")
+    }
+
+    #[test]
+    fn sample_part2() {
+        assert_eq!(part2(SAMPLE).unwrap(), "4")
+    }
 }

2022/src/day05.rs

@@ -1,9 +1,166 @@
+use std::cmp::Ordering;
+
 use anyhow::Result;
+use nom::branch::alt;
+use nom::bytes::complete::tag;
+use nom::bytes::complete::take;
+use nom::bytes::complete::take_until;
+use nom::character::complete::newline;
+use nom::combinator::map;
+use nom::combinator::opt;
+use nom::multi::fold_many1;
+use nom::multi::many1;
+use nom::sequence::delimited;
+use nom::sequence::preceded;
+use nom::sequence::terminated;
+use nom::sequence::tuple;
+use nom::IResult;
 
-pub fn part1(_input: &[u8]) -> Result<String> {
+use crate::common::enumerate;
-    todo!()
+use crate::common::parse_input;
+
+type Move = (usize, usize, usize);
+type OwnedStacks = Vec<Vec<u8>>;
+
+fn parse_row<'a>(input: &'a [u8], stacks: &mut OwnedStacks) -> IResult<&'a [u8], ()> {
+    // Forgive me for this crime
+    fold_many1(
+        enumerate(terminated(
+            alt((
+                // Parse a delimited value into a Some(content)
+                map(delimited(tag("["), take(1usize), tag("]")), |v: &[u8]| {
+                    Some(v[0])
+                }),
+                // Or an empty stack into a None
+                map(tag("   "), |_| None),
+            )),
+            opt(tag(" ")),
+        )),
+        || (),
+        move |_, (index, c)| {
+            if let Some(b) = c {
+                if stacks.len() <= index {
+                    stacks.resize_with(index + 1, Vec::new);
+                }
+
+                stacks[index].push(b)
+            }
+        },
+    )(input)
 }
 
-pub fn part2(_input: &[u8]) -> Result<String> {
+fn parse_stacks(input: &[u8]) -> IResult<&[u8], OwnedStacks> {
-    todo!()
+    let mut stacks = Vec::new();
+
+    let (input, _) = terminated(
+        fold_many1(
+            terminated(|input| parse_row(input, &mut stacks), newline),
+            || (),
+            |_, _| (),
+        ),
+        // Skip the line with the numbers
+        take_until("\n\n"),
+    )(input)?;
+
+    // Reverse the stacks since we parsed them top-down
+    for stack in &mut stacks {
+        stack.reverse();
+    }
+
+    Ok((input, stacks))
+}
+
+fn parse_task(input: &[u8]) -> IResult<&[u8], (OwnedStacks, Vec<Move>)> {
+    fn parse_usize(input: &[u8]) -> IResult<&[u8], usize> {
+        map(nom::character::complete::u32, |v| v as usize)(input)
+    }
+    let (input, stacks) = parse_stacks(input)?;
+
+    // Consume the double newline
+    let (input, _) = tag("\n\n")(input)?;
+
+    let (input, moves) = many1(terminated(
+        tuple((
+            preceded(tag("move "), parse_usize),
+            preceded(tag(" from "), parse_usize),
+            preceded(tag(" to "), parse_usize),
+        )),
+        newline,
+    ))(input)?;
+
+    Ok((input, (stacks, moves)))
+}
+
+/// Some magic to get two mutable references into the same slice
+fn get_both(stacks: &mut [Vec<u8>], from: usize, to: usize) -> (&mut Vec<u8>, &mut Vec<u8>) {
+    match from.cmp(&to) {
+        Ordering::Greater => {
+            let (begin, end) = stacks.split_at_mut(from);
+            (&mut end[0], &mut begin[to])
+        }
+        Ordering::Less => {
+            let (begin, end) = stacks.split_at_mut(to);
+            (&mut begin[from], &mut end[0])
+        }
+        Ordering::Equal => panic!("Tried to stack from and to {from}"),
+    }
+}
+
+fn compute_answer(stacks: &mut [Vec<u8>]) -> Result<String> {
+    let mut result = String::with_capacity(stacks.len());
+
+    for stack in stacks {
+        result.push(
+            *stack
+                .last()
+                .ok_or_else(|| anyhow::anyhow!("Encountered empty stack"))? as char,
+        );
+    }
+
+    Ok(result)
+}
+
+pub fn part1(input: &[u8]) -> Result<String> {
+    let (mut stacks, moves) = parse_input(input, parse_task)?;
+
+    for (count, from, to) in moves {
+        let (from, to) = get_both(&mut stacks, from - 1, to - 1);
+
+        let drain_start = from.len() - count;
+
+        to.extend(from.drain(drain_start..).rev());
+    }
+
+    compute_answer(&mut stacks)
+}
+
+pub fn part2(input: &[u8]) -> Result<String> {
+    let (mut stacks, moves) = parse_input(input, parse_task)?;
+
+    for (count, from, to) in moves {
+        let (from, to) = get_both(&mut stacks, from - 1, to - 1);
+
+        let drain_start = from.len() - count;
+
+        to.extend(from.drain(drain_start..));
+    }
+
+    compute_answer(&mut stacks)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    const SAMPLE: &[u8] = include_bytes!("samples/05.txt");
+
+    #[test]
+    fn sample_part1() {
+        assert_eq!(part1(SAMPLE).unwrap(), "CMZ");
+    }
+
+    #[test]
+    fn sample_part2() {
+        assert_eq!(part2(SAMPLE).unwrap(), "MCD");
+    }
 }

2022/src/day06.rs

@@ -1,9 +1,68 @@
 use anyhow::Result;
 
-pub fn part1(_input: &[u8]) -> Result<String> {
+fn find_first(input: &[u8], unique: usize) -> Result<usize> {
-    todo!()
+    let mut seen = [false; 256];
+
+    let mut tail_it = input.iter();
+
+    let mut first = 0;
+
+    // Loop invariant: input[first..last] contains only unique characters
+    for (last, &c) in input.iter().enumerate() {
+        if seen[c as usize] {
+            first += (&mut tail_it)
+                .take_while(|&&b| b != c)
+                .map(|&b| seen[b as usize] = false)
+                .count()
+                + 1; // +1 because take_while doesn't return the first element that didn't satisfy the condition, while we do need to count it
+        } else {
+            // New unique character found: input[first..=last] contains unique characters
+            if last - first + 1 == unique {
+                return Ok(last + 1);
+            }
+
+            seen[c as usize] = true;
+        }
+    }
+
+    anyhow::bail!("Did not find unique sequence of length {unique}");
 }
 
-pub fn part2(_input: &[u8]) -> Result<String> {
+pub fn part1(input: &[u8]) -> Result<String> {
-    todo!()
+    Ok(find_first(input, 4)?.to_string())
+}
+
+pub fn part2(input: &[u8]) -> Result<String> {
+    Ok(find_first(input, 14)?.to_string())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    const SAMPLES: &[&[u8]] = &[
+        b"mjqjpqmgbljsphdztnvjfqwrcgsmlb",
+        b"bvwbjplbgvbhsrlpgdmjqwftvncz",
+        b"nppdvjthqldpwncqszvftbrmjlhg",
+        b"nznrnfrfntjfmvfwmzdfjlvtqnbhcprsg",
+        b"zcfzfwzzqfrljwzlrfnpqdbhtmscgvjw",
+    ];
+
+    #[test]
+    fn sample_part1() {
+        const CORRECT: &[usize] = &[7, 5, 6, 10, 11];
+
+        for (&sample, &correct) in SAMPLES.iter().zip(CORRECT) {
+            assert_eq!(find_first(sample, 4).unwrap(), correct);
+        }
+    }
+
+    #[test]
+    fn sample_part2() {
+        const CORRECT: &[usize] = &[19, 23, 23, 29, 26];
+
+        for (&sample, &correct) in SAMPLES.iter().zip(CORRECT) {
+            assert_eq!(find_first(sample, 14).unwrap(), correct);
+        }
+    }
 }

2022/src/day07.rs

@@ -1,9 +1,124 @@
+use anyhow::Context;
 use anyhow::Result;
+use nom::branch::alt;
+use nom::bytes::complete::tag;
+use nom::bytes::complete::take_until;
+use nom::character::complete::newline;
+use nom::combinator::map;
+use nom::combinator::opt;
+use nom::multi::fold_many0;
+use nom::sequence::delimited;
+use nom::sequence::preceded;
+use nom::sequence::terminated;
+use nom::sequence::tuple;
+use nom::IResult;
 
-pub fn part1(_input: &[u8]) -> Result<String> {
+use crate::common::parse_input;
-    todo!()
+
+fn parse_dir<'a>(
+    input: &'a [u8],
+    dirs: &mut Vec<u32>,
+    dir_stack: &mut Vec<&'a [u8]>,
+) -> IResult<&'a [u8], u32> {
+    use nom::character::complete::u32;
+
+    enum Entry<'a> {
+        File(u32),
+        Dir(&'a [u8]),
+    }
+    let initial_len = dir_stack.len();
+
+    let (mut input, mut size) = preceded(
+        tag("$ ls\n"),
+        fold_many0(
+            // Map many newline-terminated entries
+            terminated(
+                // of either
+                alt((
+                    // A size followed by a name
+                    map(terminated(u32, take_until("\n")), Entry::File),
+                    // Or the word "dir" followed by a name
+                    map(preceded(tag("dir "), take_until("\n")), Entry::Dir),
+                )),
+                newline,
+            ),
+            || 0u32,
+            |files_sum, entry| match entry {
+                Entry::File(size) => files_sum + size,
+                Entry::Dir(name) => {
+                    dir_stack.push(name);
+                    files_sum
+                }
+            },
+        ),
+    )(input)?;
+
+    for i in initial_len..dir_stack.len() {
+        let (new_input, content_size) = delimited(
+            tuple((tag("$ cd "), tag(dir_stack[i]), newline)),
+            |input| parse_dir(input, dirs, dir_stack),
+            // Optional cd'ing out because the last directory is never exited.
+            opt(tag("$ cd ..\n")),
+        )(input)?;
+
+        input = new_input;
+        size += content_size;
+    }
+
+    dirs.push(size);
+    dir_stack.truncate(initial_len);
+
+    Ok((input, size))
 }
 
-pub fn part2(_input: &[u8]) -> Result<String> {
+fn parse_program(input: &[u8]) -> IResult<&[u8], (u32, Vec<u32>)> {
-    todo!()
+    let mut dirs = Vec::new();
+    let mut dirstack = Vec::new();
+    let (input, size) = preceded(tag("$ cd /\n"), |input| {
+        parse_dir(input, &mut dirs, &mut dirstack)
+    })(input)?;
+
+    Ok((input, (size, dirs)))
+}
+
+pub fn part1(input: &[u8]) -> Result<String> {
+    let (_, sizes) = parse_input(input, parse_program)?;
+
+    let searched_size: u32 = sizes.into_iter().filter(|&size| size <= 100000).sum();
+
+    Ok(searched_size.to_string())
+}
+
+pub fn part2(input: &[u8]) -> Result<String> {
+    const TARGET: u32 = 30000000;
+    const TOTAL: u32 = 70000000;
+
+    let (used, sizes) = parse_input(input, parse_program)?;
+
+    let required = TARGET - (TOTAL - used);
+
+    let min = sizes
+        .into_iter()
+        .filter(|&size| size >= required)
+        .min()
+        .context("Did not find dir large enough to delete")?;
+
+    Ok(min.to_string())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    const SAMPLE: &[u8] = include_bytes!("samples/07.txt");
+
+    #[test]
+    fn sample_part1() {
+        assert_eq!(part1(SAMPLE).unwrap(), "95437");
+    }
+
+    #[test]
+    fn sample_part2() {
+        assert_eq!(part2(SAMPLE).unwrap(), "24933642");
+    }
 }

2022/src/samples/03.txt

@@ -0,0 +1,6 @@
+vJrwpWtwJgWrhcsFMMfFFhFp
+jqHRNqRjqzjGDLGLrsFMfFZSrLrFZsSL
+PmmdzqPrVvPwwTWBwg
+wMqvLMZHhHMvwLHjbvcjnnSBnvTQFn
+ttgJtRGJQctTZtZT
+CrZsJsPPZsGzwwsLwLmpwMDw

2022/src/samples/04.txt

@@ -0,0 +1,6 @@
+2-4,6-8
+2-3,4-5
+5-7,7-9
+2-8,3-7
+6-6,4-6
+2-6,4-8

2022/src/samples/05.txt

@@ -0,0 +1,9 @@
+    [D]    
+[N] [C]    
+[Z] [M] [P]
+ 1   2   3 
+
+move 1 from 2 to 1
+move 3 from 1 to 3
+move 2 from 2 to 1
+move 1 from 1 to 2

2022/src/samples/07.txt

@@ -0,0 +1,23 @@
+$ cd /
+$ ls
+dir a
+14848514 b.txt
+8504156 c.dat
+dir d
+$ cd a
+$ ls
+dir e
+29116 f
+2557 g
+62596 h.lst
+$ cd e
+$ ls
+584 i
+$ cd ..
+$ cd ..
+$ cd d
+$ ls
+4060174 j
+8033020 d.log
+5626152 d.ext
+7214296 k