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initial commit, includes days 1 and 2 solutions

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Stephen Waits committed 2020-12-02 15:21:56 -08:00
commit 71e7c5e90d
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.gitignore
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/target
Cargo.lock
Generated
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# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
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[[package]]
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dependencies = [
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Cargo.toml
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[package]
name = "aoc2020"
version = "0.1.0"
authors = ["Stephen Waits <swaits@amazon.com>"]
edition = "2018"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
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regex = "1"
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8-13 j: sddtjjjjlzqjtnjjj
2-4 l: wmxltll
1-9 k: gdjhphrfxsdpjqqkx
15-17 n: pptwgnwfmmnxswjzn
17-18 k: kkkkskkkkkknskkkkkkk
12-17 c: ccccccccccsccccccc
8-17 b: btxbbbbmbbbbbbbbcb
17-20 s: tshrnrqlssdtsnsdsgcw
2-4 w: wwww
1-5 s: lhspxs
9-13 g: cggggchgggfzgggg
1-2 v: vvvfm
1-11 v: vfvvmfvtnvvkvc
18-19 b: bbbbbbbbbtbbbbbbbbbb
8-10 p: ppfpppjzpvr
6-12 r: rrrggrcrmrlr
5-6 d: dpddls
1-3 r: rrrt
1-3 j: jjkghtlh
3-9 q: hcqqhgrjqqvtqqjvjxvl
7-9 n: nnnnnnnnn
11-12 v: vvvvvvvgvvvv
4-13 d: djddddmdgddddddx
1-2 b: sbbq
9-14 b: dbdgpsfzbjpkbbkbzs
7-13 p: pppftpxlrbhrkpppp
1-6 p: ppppppp
2-4 w: wwnw
8-15 l: klllllllllllllkll
4-8 z: zvzzzzgzzz
15-16 n: nnknnnnnwnnnnnsnnn
1-8 c: chczcdcccpccc
2-13 f: gfblfggbfzhff
2-6 g: njglpsbmxrl
16-18 q: hhvfzzqqqnqhpwxqvq
4-11 f: ffsffnffffsfs
14-16 m: mmmmmmmmmmmmdqmmmjmm
3-11 l: llglllllllvl
5-10 l: tngnngcrjnhfpklt
12-14 n: nnnnnnnnsnntnx
4-16 b: hdbbjbhzcbvrfbhbntb
14-15 r: kxrrrrrrrrrrrrrrr
9-11 d: dhdtjdddsdzqddzdxxd
5-11 n: ndxnnsnnnndn
5-6 n: xnnnnnn
3-7 s: ssssgvscxldkdlspct
13-17 f: fffffffffffffkffff
8-13 v: vwwvvvvzvmvkq
2-6 t: tstplhxt
2-11 c: zfcgscfpgcbbqc
4-5 z: zszqqxcbjnrwkwzgnjzt
12-13 g: ggggjgggggggggjgg
4-5 j: wjmwcrsjjbpt
1-4 n: nnnqn
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3-8 h: zhphrhbhkhbxwh
4-5 c: cccbhc
10-13 d: wgdddddzdlndnkddqdwg
18-19 g: gggbgggbhgpggggggdz
10-14 x: xxxxxxxxxqzxxgq
7-19 t: dtsmsstnttxttrttttt
3-4 s: stsd
1-4 d: dddn
4-14 b: frgbbqbbqbgqjgln
6-7 h: hhhhhgs
11-13 w: xwqwwwwwgzwwwklwtsw
4-5 s: ssskz
1-14 s: shsfrdqnssswss
2-3 n: nhknnnnnnnpnnnnnn
5-13 q: qqqqzqqqqqqqqq
3-10 b: rfbksnzmsbkpdbrfpfks
1-2 v: vvdqwbknv
9-10 r: rrrrrrrrmr
1-2 b: sqbbbc
10-11 n: nnnnnnnnnznn
1-8 t: thtjttctdmgvnwfr
14-16 j: jjjdjkjjjjjjjjjjjvj
7-8 v: tvvnlvvvhvvv
7-13 s: fshsssssssfsslpjsr
6-10 s: ssssssssssss
3-7 m: mqmzmsm
2-13 z: cnlbjnngdzsqtnbk
5-6 j: jjrdnt
14-15 h: hhhghhhhhhhhhpm
2-6 l: lnkllpfdsd
8-9 p: pptpppbvzp
13-15 x: xxxxxlxxxxxxbxh
2-9 k: xrglrkvkkrkkxkk
4-5 r: rlffgcqjbrvtdscr
2-8 n: nnnnnjnn
7-9 b: vdspbxxbg
9-10 b: bbbbbbbcrvbbbbbbbbb
5-10 l: lhllvpvxcbfclllvll
2-5 n: mkjnz
10-18 b: bhthcpbwbbpdjspbsb
8-10 r: rrprrrqsrrrgzrlcf
12-13 w: wwwwwwpwwwwdb
4-16 z: zzvnzzzzzzzqwzzlzz
12-17 t: tttttttbtwttdttttttt
2-3 b: bbbc
2-9 b: phbmnbbdgbxbr
6-8 r: rprrrrrr
14-16 x: xxxxxxxxxxxxxxxx
10-11 d: dvdrdkdfhdtdddddd
6-7 v: vgvvvvvvjw
3-4 h: hhhh
7-10 m: hmmqdssxmnmm
5-6 d: dddddn
13-19 x: xxxxxxxxxtxxgxxxxxc
5-12 g: ggxmgzlggbggggltkggx
1-15 f: nznmdrdfbrcnnslh
7-8 g: jxjgqmggggtdgsdgggm
1-3 p: kpjxqpkpp
3-4 s: fbxl
1-4 j: jfhjdlxbwrdjxzktz
11-12 m: mmmmmmmmmmmm
16-17 v: vvvvvvvvvvvvvvvnz
8-15 z: bzzdzzqztznfgzzvz
2-4 c: fglsc
1-8 q: qbqgqgtq
11-13 c: ccrjctrpfcxccqv
8-11 l: llllllnlllgfc
4-6 l: glqltllxllhb
7-10 c: fclctdcgcqjlctc
5-12 t: dtttttmttvbt
3-5 d: vddtdzdddvgd
8-18 z: zzzzzzzzzzzzzzzzzz
1-8 s: qtspsssw
4-6 g: rsggjm
1-12 r: drrrrrrrrrrsr
3-15 q: fqtsbqtcjqqzqqwq
2-8 v: qvsvcdvvvvv
4-6 p: pkctjwgjpm
3-5 s: ssgwns
11-17 v: vvvvkvvvvvvvvvvvrvp
5-10 f: ffffhxffxgfffx
1-2 h: dnhhhhhhh
5-11 r: jzltrrrvtjrs
3-6 c: hcccpqrcd
4-18 p: nrpppbkvwrlzjvpwcpt
6-7 q: qqqqqkh
6-8 v: vvvvvvvv
4-5 b: bjpnk
7-12 r: rvrrnrrdrlrr
2-17 j: zjjjcjtjjjjfjspjj
1-4 g: gggg
4-9 f: lfffwffffzwffn
1-7 z: nzzxzwpzpfzzzz
5-7 z: zzcjbztlc
2-3 s: sjsqzfhs
7-11 n: nvnsnjvnhtsnphkzs
11-12 n: nnnnnnnnnnjc
1-4 d: vddg
3-4 q: qqzw
8-10 t: thzttttsptt
3-9 w: lwpgwrwmgc
9-13 d: bdfmkdlbdgtdd
2-3 l: jlll
4-6 v: mscgmnvvtvtzvklqhzvv
2-10 c: ccnzfcmzccpqnc
6-9 w: wwwwwwwwsj
9-15 l: llllnlllmlllxll
8-9 q: lqqbffqqqqnlqzwqqlrg
7-9 p: pppppzptbp
9-13 b: bbbbbbbbhbbbv
13-20 p: zhpppppppppppppppqpp
7-8 d: dddddddd
10-11 v: vvhvvvvzvvvgvzv
5-7 x: xxxxvxt
7-14 d: ddddddcdlddddpvjdd
4-5 x: xxxnx
4-11 m: mdrjmkbhmmgmmmm
11-17 v: vvvvvvvvvvvvvvvvkn
10-17 l: ltddhlllllljlllllll
6-10 j: fbjnvgtwdm
9-12 c: lcccccgcfccccc
7-12 z: zlqzzhbmzzqszzg
4-5 s: ssssslh
10-19 x: wjzfxrcdpxzxxxxgkmx
11-14 l: klllvpklrlpllvllll
5-7 h: hhhldtrhhzg
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2-3 v: vrkvv
9-18 b: bbhbbbgbbfbbbbbbbcqb
3-10 f: fdlvdffffhfffff
7-8 s: xsgssfstsssnlrzqs
6-8 p: vprjjprzb
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9-14 f: fkffffqfjfffzffnf
16-17 x: xxxxxxxxxxxxxxxnr
1-14 m: mmmmmmmmmmmmmmmmm
14-16 d: kwtvhfwddvcxdddd
3-15 k: kknkkkkkkkskkgkkkdkk
3-6 d: dsdmndpdmvcllq
4-5 d: gdvqqqtqw
13-14 l: llllllllllllwb
8-14 h: chlhflhxhchnwl
12-15 j: jjsljjjjjjjhjjwjj
3-14 c: pxxlstbvfmmzhcjcv
4-14 p: fhpxvfxblfphhjppdddp
2-3 j: jjjj
16-18 r: rrrrrrrrrrrrrrrrrp
8-13 p: vlppwpphhjppk
8-11 w: wwwzwwmlwwwwwww
14-16 k: qqvtnmpkkrpfzsnftwtk
15-17 b: bbbhbbbbbbbbbbbbbb
7-8 m: mmmmmmsj
11-12 v: vzvvvvvvvvvvv
5-8 p: jpppphpp
3-4 n: ndjntnl
10-11 v: jmcvpvvfxhjw
1-4 p: pndptkg
1-2 z: gmzzpgzrzzzr
4-6 b: rrbnbbblb
7-8 r: rtrrrrrr
5-6 z: zznzzk
12-13 j: jzjdvqjsjpljjnzjsvst
3-4 k: gkkkrk
8-10 g: ggggxgglghw
5-8 w: wwkwwwww
1-2 x: xjrgjxxns
3-5 s: mlszs
2-5 r: trrglpk
14-15 d: drdjwgvdxcrgdvpxd
4-12 h: wpklmfhrkcqdd
6-8 v: vpvxjlvl
16-19 m: mmmmmmwmmmmmmgmbmmhm
11-12 n: nnxnhqrnknlp
1-3 h: hknfhwwz
3-4 r: zrrlrqbp
16-17 h: hhhhhhhhhhhhhhhwh
4-7 b: xbqxbkjbbbb
7-9 g: ggggggggg
8-9 t: tttttttkt
2-5 j: fkjhxjjftwjpgjxq
5-8 c: ccvcccvcc
14-17 g: gggggggggggggnggpg
8-12 x: xxxfxxxxlxtpxvx
7-12 l: lllllllllllllllll
6-8 v: vzvvvvvvvh
7-9 w: wwwwwwswj
2-3 j: lvvrj
3-4 r: rnrrsr
1-8 c: kqvcsngc
4-8 r: rrrrrrrr
4-6 z: cczzzgz
2-4 v: vvhvkm
10-14 h: ccnhhbhhhhhmhhh
3-4 v: cvvvvfcwmg
8-15 g: ggghgckggbkggmgggkkg
10-13 v: vvvvvvvvvqvvm
1-3 h: hhkhh
4-6 l: llldlg
8-19 c: czcsjccrqcvjcclcccc
13-20 s: ssssssjsssssssssssss
5-6 s: tsssvjqlls
4-9 s: sntvsssszsm
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9-10 z: wpzmzkzzzzzvd
6-17 g: gglfgqkglgrgrggnzg
10-11 f: ffsbdjfhbdgfksffhn
9-10 n: nnggcfptnngnnszppgv
8-12 w: wwrwwwwwnwwwwwwww
7-17 r: wkrrfcrjrrdprpxrrcr
9-10 m: mmmmmmmnwxmm
1-8 x: lxbxxxxd
1-6 h: xhhhhhhhhh
8-12 b: bmbbbpbnkdbbbjblbb
7-9 m: dmmtwmcdgj
1-3 q: qcqvqlqggzrhm
10-15 v: vvvvvvvvvvvvvvvv
1-13 l: llglllwllllblllll
2-7 s: szsszstbsg
1-5 h: hhhwhhphzczth
7-18 f: xnzzkfqsfntwtfwflb
3-5 v: fzdvg
2-8 s: lsvsshsssss
10-11 z: zzzzzzzzxzzxzzzzz
1-4 r: prrrrrr
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9-15 j: mjjjrjjcqjwjjjjj
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12-13 k: kkkkkkkkkkkkk
7-9 t: trttcgtttttt
14-15 l: llllpllllllllll
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1-4 v: pvrrvv
13-14 j: jjjjjjjjjdjjgjj
3-5 x: xqxxxsx
2-3 z: zzsxz
3-7 n: nnnnrtjbnn
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8-11 b: bbblfbjqbbkqkcbbbbm
4-5 w: swqrftwvwwq
3-4 c: bsnpvrccvthcwb
4-6 p: pplnxkpw
6-8 k: krkkkkkk
4-8 x: ggdsdrdncmkpvqrxckt
9-18 t: ttttttttttvtttxbht
13-14 w: wwwwwwwwwwwwww
3-4 g: pgggmgxdm
13-14 r: rrrrxrrrrrrrtp
5-8 h: qmhhhhht
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4-5 g: hlghgklvpgg
12-13 q: qqqqqqqqqqqbx
5-10 g: ggggdggggm
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4-13 h: hhhhhhhhhhhhkhh
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4-9 x: xmxkbdxfc
1-2 q: gqtg
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4-8 f: ffkffvkfvfp
14-15 b: bbbbbbbbbbtbbbk
8-14 f: ffnfkpfkxvmvfjpffrr
9-13 r: rrlrrxkrzrrrkr
2-4 x: xxxlx
1-6 c: mcfccc
16-17 v: xvvvvvvvvvvvvvvvv
2-7 t: dvzktkt
9-18 z: ztqzzfzzzczjzczhzkzz
2-13 z: czkznmsgqmhfz
1-8 f: wkffffffffxfffffffff
6-9 b: bbbrrbxbrbxqb
6-9 x: xqxkxfwpsxxdxtnxd
1-13 j: jjjjjjjjjjjjjjj
2-4 h: thzhxhhk
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9-18 t: wbtbptjfnvtvcnttctm
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5-6 g: ggggqg
4-5 d: fdddd
1-10 n: bdnnncbsbjnccf
14-15 f: ffffzfffffffcpw
8-9 t: ttttttttt
11-16 p: rppppppppppsnjnppppp
9-12 r: llrclfnkcrrrrrrrrdt
2-8 r: rrrrrrrrr
7-8 f: lmdnndpwfbqfxrnqw
3-9 k: kkkkkkkkskkkkk
6-14 h: hhhhhhhhhphhhh
2-11 g: ggggggggggffl
2-10 z: zxzzzzzzxgmfzt
10-11 r: rrrrrrrrlrrdxrr
2-5 m: mvqmq
2-6 w: wwjlwwwqmsn
3-5 j: jzjjq
4-7 j: jjjnjjnj
3-4 v: vvvj
1-4 h: hhhh
10-11 w: wwgwwjlwwkccmfwwkq
13-15 k: kkrlkkkkkkkkkkk
4-5 q: qqqbr
2-4 h: hqhh
9-12 k: kkkfvpxkkkrkkkb
7-10 x: xxxxxxxxxx
5-9 n: nnznnnxmn
16-17 c: ccccccmcccccclczmc
1-3 x: xxxq
9-18 w: wvwxwwtwwvgwwwwnwwf
14-15 l: lcllllllllllllllll
15-18 f: fffffffffffffrdffnf
6-7 k: kkkxlkbkk
5-7 j: jjjjqjtjj
1-9 b: jbbbxgqqjdlb
1-3 r: wwrmvlqzhqsltznlhcd
9-11 d: dddddddddddd
4-9 l: llrmlvllrvl
2-7 f: tfgfvwjsnflh
2-3 v: cvvvv
3-6 z: nkzwnzkvzqlzkwszdz
3-9 v: vhqzcvvvfrvdm
12-13 n: nnnnnnnkfnnqjnnw
6-14 f: ffffffffffffff
6-9 x: mxxgrnxxqxcglx
4-7 w: whwwwwwnw
1-5 v: vvflv
3-6 h: hhhhhh
10-12 k: kkktrgncpkvkk
1-3 w: wfwqq
18-19 l: llllllqlllllllllllj
7-10 t: fttthttjqtj
7-9 b: bblbbbwbt
5-7 r: rrhrqrrr
1-7 w: kwwwwwsw
4-6 h: hpnmzhbhfhqntvr
5-8 x: mxmxpxxjvx
6-10 t: qgtmhfflnbvnttpngvvj
4-9 t: tvtfttttvtl
3-4 q: qhxv
3-8 x: fxcxlxjsxwgs
14-16 k: kkkkkxkkkkkkdrkv
2-4 x: qppr
9-13 b: bbbbbjzbsbgbzbbbbb
4-13 s: sssssssssssssss
3-10 d: dslldmdwdfwdwnmpjd
7-8 s: sssssssr
5-7 f: fffffffh
1-2 f: ffxf
2-3 c: cccc
10-12 c: cchccccccccc
12-14 q: hqmhqqrqvlgqgqlqtsqq
4-5 m: mmmms
2-12 j: bjfjdjxmjcjjhtzvs
4-13 p: bsprpkglzfscp
5-7 d: dddddbdddzt
2-8 q: vqcqcqrmqg
9-10 v: vvbvvvvvvv
9-10 c: cccccccbsc
10-14 n: nnnnnnnqnknnnznn
5-7 t: ttttttt
7-12 c: ccccckccckcccg
3-4 b: mgjbbsmbcbbp
4-8 t: swztttxttttpsvt
11-12 r: rrrrrlrrrrrc
3-5 t: tmppv
2-11 v: nspwbnmjcvszpvrhvjv
4-5 v: vvvvvtv
8-9 x: xnndxxxtrxqfxx
13-16 s: zdsqjvrhqxxswscszbl
7-15 s: sjsjssqsssssssss
2-16 j: nzxqwnjkjjqczhjkjdj
13-14 z: zzzzzzzzzzzzzz
2-4 j: jmjh
7-8 t: httftnsmtt
2-3 f: gpfc
12-13 x: pxxxxxxxxwxvqxx
1-5 h: hbqkhp
5-9 k: mmkkhkkknwqk
1-4 j: jjjxjtjjjjjdj
4-5 r: rfrrrr
1-7 d: fpbqxxddh
9-13 g: gggggvggggggggg
4-8 q: qqqkqqqqq
16-18 x: mpxdckjxbqhmxxlxxzxx
2-14 f: fffwffffffffmff
15-19 w: bzmkzxqthgswzlwnphww
4-7 j: jzjjzjjpzjlvjjjjljj
2-5 b: brbbwprbvb
5-7 x: cxrxwxw
2-4 n: nnhn
3-4 q: qqsqq
8-15 v: hnvzkvvrjnvvvvvj
3-4 j: jjcjjp
1-7 d: ddvddddbd
3-8 v: pgvfvrcv
5-8 p: bbppdttpkpfp
12-17 k: kkkfkkkkqkkqkkskdk
1-8 k: pcbkwswkmkkkbkrkk
16-17 f: fffffffzffffffffff
3-7 q: qqqqqqq
2-4 s: sssss
11-13 x: jxmczktzfrrrv
15-19 l: lllllclllllllllflll
8-14 m: mmmmmmmmdmmmmmmmmmmm
5-10 j: jjdxtcpwfxqqgpn
2-7 n: nnmnnnjnnntz
10-16 j: jjjjjjjwjpjjjjjnj
3-15 m: mvmttdmmsmmmkwmx
3-4 q: qqqql
5-6 b: bbbbjn
14-17 t: ttttttttptttttttxt
12-17 m: mqgpmmmmbmmmmmpmmg
19-20 n: njngnntvnnpndnsndnsg
1-7 j: gbxzpqwcsc
1-2 r: mxdvrbqr
5-10 z: fzxzpczfcbkzzzzzz
7-8 d: dddddddddd
9-10 d: ddddddddpz
3-16 b: bbjbbbbbbbbbbbbb
8-10 b: bbcbbdbvbk
12-16 x: xxxxxxxxxxxxxxxbx
1-3 l: nklsbwr
3-7 k: kkkfhkkzwkz
5-10 f: lqphfhztff
2-4 k: kqffwknfrg
5-9 w: wwwwqwwwpww
1-6 z: jdbrjvm
7-8 r: rrrrrwrrlmr
2-13 m: nszmspbmrrtpwppmq
14-15 z: zzzzzzzzzzzzzzz
4-9 x: dmklkllxx
3-4 m: mmqpfmgzgkhwz
1-6 q: fphqvm
9-12 p: pvprppdtpxsjbpmmppp
4-5 x: xxxqmx
1-9 d: ddpjdcmbdstn
1-3 g: gggg
2-4 w: wlclwzf
5-11 f: ffffbzfnwfh
2-4 v: vhvhj
1-4 h: hqskhghrznfkkg
2-6 b: bxbbtk
2-4 x: xxxx
7-8 w: wwwwwqnxwww
2-12 h: hshhnhhxlbfchhhdhhsh
16-17 q: qqqqfqqcqdqqtqqcf
9-12 t: ttttttttjttt
1-3 m: hdzdvv
5-14 r: rmrkrbrrlrrrhwrrpkr
4-6 g: gggggx
15-16 r: rrrtrrrrrrrrrrtp
5-13 q: mzqtnknqzqgqhqdkwmlf
13-14 d: ddddddddvdddddd
4-5 p: ppprzr
7-8 z: zzxzzzfjz
8-9 c: ccgzcccmhcc
4-5 x: hxxxxq
1-3 t: ttttttpttltt
11-14 h: hhchhbtvfvjhhr
7-8 r: brrrrrmrrr
8-12 v: vvvvvvvnvvvf
5-6 l: nddlllwlllll
13-14 k: kkkkkfvkkkklmwkk
8-10 t: tttttttttt
2-9 k: jbrxrwkhkh
4-5 p: hpppp
10-12 z: zzzzzzzzzzzfzz
2-8 c: cqxkjkdhkgsdddtvt
1-5 d: dddsdhd
4-13 v: vvxlvvvvvvvvgvv
1-4 q: pqqv
3-4 k: krrk
6-8 v: cdvvvxvhvvvvv
1-3 d: ddddtd
10-11 b: bbbbbbbbbpj
9-16 d: ddrddddgdcddddddd
9-10 k: llrctckdkkv
8-11 f: jnffzfrffgffsfwfvkkj
8-13 d: dbddnddnjdmjdddkdd
5-6 b: bbbbhzbz
2-11 h: hhvghhhhhhh
15-16 q: qqqqqnqtqqqbqxqlqqcq
4-5 k: kkkdw
10-16 j: jqvhdjgmkjckjlpg
6-11 q: vqdnfbqqgqmqqqqq
8-11 q: qqrqqqqqlkq
8-11 v: wvvvvvvvfvvvrvvj
8-13 s: ssssssssscsfsss
6-8 w: pwwtwwlwwhww
8-9 f: ffffjfflb
2-4 v: jvgxmphvr
2-6 r: rrzrcd
10-16 n: lvknnwnnvsmnnnnhn
12-13 r: rrrpjrrrrrrtfrkwmr
data/output-01.txt
+2
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@@ -0,0 +1,2 @@
1016131
276432018
data/output-02.txt
+2
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622
263
src/day01.rs
+41
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@@ -0,0 +1,41 @@
// ==== day 1
use crate::utils;
use anyhow::{anyhow, Result};
fn day01_part1(data: &[i64]) -> Result<i64> {
for i in 0..data.len() - 2 {
for j in i + 1..data.len() - 1 {
if data[i] + data[j] == 2020 {
return Ok(data[i] * data[j]);
}
}
}
Err(anyhow!("no result found"))
}
fn day01_part2(data: &[i64]) -> Result<i64> {
for i in 0..data.len() - 3 {
for j in i + 1..data.len() - 2 {
for k in j + 1..data.len() - 1 {
if data[i] + data[j] + data[k] == 2020 {
return Ok(data[i] * data[j] * data[k]);
}
}
}
}
Err(anyhow!("no result found"))
}
pub fn run() -> Result<(i64, i64)> {
let data = utils::read_i64s("data/input-01.txt")?;
let answers = utils::read_i64s("data/output-01.txt")?;
let p1 = day01_part1(&data)?;
assert_eq!(p1, answers[0]);
let p2 = day01_part2(&data)?;
assert_eq!(p2, answers[1]);
Ok((p1, p2))
}
src/day02.rs
+48
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// ==== day 2
use crate::utils;
use anyhow::Result;
use regex::Regex;
struct PasswordSpec {
min: usize,
max: usize,
required: char,
password: String,
}
fn valid_password_1(p: &PasswordSpec) -> bool {
let count = p.password.chars().filter(|c| c == &p.required).count();
p.min <= count && count <= p.max
}
fn valid_password_2(p: &PasswordSpec) -> bool {
let char_a = p.password.chars().nth(p.min - 1).unwrap();
let char_b = p.password.chars().nth(p.max - 1).unwrap();
(char_a == p.required) ^ (char_b == p.required)
}
pub fn run() -> Result<(usize, usize)> {
let data = utils::read_file("data/input-02.txt")?;
let answers = utils::read_i64s("data/output-02.txt")?;
// parse lines like "4-8 n: dnjjrtclnzdnghnbnn" into vector of PasswordSpec{}
let re = Regex::new(r"(\d+)-(\d+) +([a-z]): +(\S*)")?;
let pwspecs: Vec<PasswordSpec> = re
.captures_iter(&data)
.map(|cap| PasswordSpec {
min: cap[1].parse().expect("parse error"),
max: cap[2].parse().expect("parse error"),
required: cap[3].chars().next().expect("string index error"),
password: (&cap[4]).to_string(),
})
.collect();
let p1 = pwspecs.iter().filter(|p| valid_password_1(&p)).count();
assert_eq!(p1, answers[0] as usize);
let p2 = pwspecs.iter().filter(|p| valid_password_2(&p)).count();
assert_eq!(p2, answers[1] as usize);
Ok((p1, p2))
}
src/main.rs
+18
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use anyhow::Result;
mod day01;
mod day02;
mod utils;
// TODO
// ====
// * move from i64 to something else that works with the data+problems, int, i32, usize?
// * clean up error handling (move to `?` inside closures)
// ==== main()
fn main() -> Result<()> {
println!("Day 01: {:?}", day01::run()?);
println!("Day 02: {:?}", day02::run()?);
Ok(())
}
src/utils.rs
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// ==== utilities
use anyhow::Result;
use std::fs;
pub fn read_i64s(filename: &str) -> Result<Vec<i64>> {
Ok(read_file(filename)?
.lines()
.map(|s| s.parse::<i64>().expect("i64 parse error"))
.collect())
}
pub fn read_file(filename: &str) -> Result<String> {
Ok(fs::read_to_string(filename)?)
}