Solve day 12 (pain)

input/12-0a.in

@@ -0,0 +1,4 @@
+AAAA
+BBCD
+BBCC
+EEEC

input/12-0b.in

@@ -0,0 +1,5 @@
+OOOOO
+OXOXO
+OOOOO
+OXOXO
+OOOOO

input/12-0c.in

@@ -0,0 +1,10 @@
+RRRRIICCFF
+RRRRIICCCF
+VVRRRCCFFF
+VVRCCCJFFF
+VVVVCJJCFE
+VVIVCCJJEE
+VVIIICJJEE
+MIIIIIJJEE
+MIIISIJEEE
+MMMISSJEEE

input/12-0d.in

@@ -0,0 +1,5 @@
+EEEEE
+EXXXX
+EEEEE
+EXXXX
+EEEEE

input/12-0e.in

@@ -0,0 +1,6 @@
+AAAAAA
+AAABBA
+AAABBA
+ABBAAA
+ABBAAA
+AAAAAA

input/12-1.in

@@ -0,0 +1,140 @@
+GGGGOOOOOOOOXXXXXXXXXXXXXXXXXSSSSSSSSSSSWWWWWWWWWWYYYYYYYYYYYYYYVVVVVVVVVVVVVVAGEEEEEEEEGGGGGGGGGGGGGEEBEQEYYYYYYYYBSSSBBBBBBBBBBBBBBBBBBBBB
+GOOOOOOOOOOOOXXXXXXXXXXXXXXXXSSSSSSSSSSWWSWWWWWWYWYYYYYYYYYYYYYYYPVVVVVVVVVVVVVVEEEEEEEEGGGGGGGGGGEGGEEEEEEYYYYYYYYBBBBBBBBBBBBBBBBBBBBBBBBB
+GGGGOOOOOOOOOXXXXXXXXXXXXXXXSSSSSSSSSSSWSSWWWWWWYYYYYYYYYYYYYYYYYYVVVVVVVVVVVVVVEEEEEEEEGGGGGGGGGEEEEEEEEEEEYYUYYYYBBBBBBBBBBBBBDBBBOOBBBBBI
+GGGGGOOOOOOOXXXXXXXXXXXXXXXSSSSSSSSSSSSSSSQQWWRWYYYYYYYYYYYYYYYYYYVVVVVVVVVVVVVVEEEEEEEEGGGGGGGGGNEEEEEEEEEEYUUUUUUBBBBBBBBBDDDDDBBBOOBBBBII
+GGGOOOOOOOOOXXXXXXXXXXXXXSSSSSSSSSSSSSSSSSQQQRRRYYYYYYYYYYYYYYYYYYYVVVVVVVVVVVVVEEEEEEEEGGGNGGGGGNTTEEEEEEEEUUUUSSSBBBBBBDDDDDDDDDDOOOBBBBBI
+GGGGOOOOOOOXXXXXXXXXXXXXXSSSSSSSSSSSSSSSSRMMQRRRYYYYYYYYYYYYYYYYYYYVVVVVVVVVVVVVEEEEEEEEGGNNGGGGGNTTEEEEEEEEEUUSSQQQOBDDDDDDDDDDDDDDOBBBBBBB
+GGGGGOOOOOOXXXXXXXXXXXXXXSSSSSSSSSSSSSSSRRRRRRRRRJQQYQYYYYYYYYYYYVVVVVVVVVVVVVVVEEEEEEEEGGNNNNNGNNNEEJUUUUUUUUUUQQQQQDDDDDDDDDDDDDDBBBBBBBBB
+GGGYGYOOOOOOXXXXXXXXXXXXXXXSYYSSSSSSSSSRRRRRRRRRJJJQQQCYYYYYIVYBBVVVNNNNNVVVVVVVEEEEEEEEGGNNNNNNNNNEJJUUUUUUUUUUQQQQQQQDDDDDDDDDDDDBBBBBBSSK
+GGGYYYOOOOOYYYXXXGGXXXGGGGGYYYYYSSSSOSSRRRRRRRRRRQQQQQQYYYEEIIIBBVVVNNNNNVVVVVEEEEEEEEEEGGGNNNNNNNNNNJGGUUUUUUUUNQQQQQYDDDDDDDDDDDDSSKSSSSSS
+GGGGGYYOYOOYYXXXGGGGGGZGGGYYYYSSSSSSSSSSRRRRRRRRAVVQQQYYYYEIIIBBBVVVNNNNNNVVEEEEEEEGGGGGGGGNNNNNNNNNJJGGUUUUUUUUUQQQQQQDDDDDDDDDDDDDSSSSSSSS
+GGGGGYYYYYYYYYXXXXGGGGGGGGGGYYYSSSYYYSSRRRRRRRRRVVVQQQQIYYIIIIIIBBVNNNNNNNVVEEEEEEEUUUGGGGGNNLGNNNNGGGGGGUUUUUHHQQQQTQQDDDDADDDDNDBBBSSSSSSS
+GGYGYYYYYYYYYYXXXXGGGGGGGGGGYYYYYYYRRSRRRRRRRRRRRRVVVQQIIVIIIIIIIGNNNNNNNNMMEEEEEEEEEGGEEERRRGGGGGGGGGGUUUUUUUHGQSQTTTCDDDXXDDDDNDBSSSSSSSSS
+YYYYYYYYYYYYYYXXXGGGGGGGGGGGYYYYYYYRRRRRRRRRRRRRRRVVVVQQQVXIIIIIQGNNNNNNNNUMEEEEEEEEEEEEEEEERGGGGGGGGGGUUUIUUHHHHTTTTTCDDDXXDDDDNNSSSSSSSSSS
+YYYYYYYYYYYYYYYXXGGGGGGGGGGGGYYYYTRRRTRRRRRRRRRRRRRVVVVVVVIIIGIGGGGNNNNNNNNAEEEEEEEEEEEEEEEERGGGGGGGGGGIIUIIGGHHHTTTTTCDDDXXXXNDDNSSSSSSSSSS
+YYYYYYYYYYYYYYYXGGGGGGGGGGGGGGGGYTKTTTTRRRRRRRRRRRVVVVVVVVVVIGGGGGGGNNNNNNZMMEEEEEEEEEEEEEEERRRGGGGGRRIIIIIIIIOHHTTTTTTTXXXXXXNNNNSSSSSSSSSS
+YYYYYYYYYYYYYYYGGGGGGGGGGGGGGGTTTTTTTTGTRRRCRRRUUUUUUUUUVVGVGGGGGGGGGNNNNMMMMMMEEEMEEEEEEERRRRGGGGRRRRRIIIIIXITHHTTTTTSSSXXXXXNUUNSSSSSSSSSS
+OOYYYYYYYYYYYSYGGGGGGGGGGGGGGGGGGTTTTTTTTCCCRRRUUUUUUUUUVVGGGGGGGGGGGGGGTTMMMMMEEEMMEEEEEEERRRGRRRRRRRRIIIIIXTTTTTTTTSSSXXXXXXUUUNNNSSSSSSSS
+OYYYYYYYYYYYSSGGGSSSGGSGGGGGGGGTZTTTTTTTTCCCCCRUUUUUUUUUVVVTGGGGGGGGGGGGMMMMMMMMMMMEEEEEEDDTTRRRRRRRRRBIIIIITTTTTTTSSSSSXXXXXXUUNNNNSSSSSSSS
+OYYYYYYYYYYYSSSSSSSSSSSSGGGGGHGTTTTTTTTTTTTCCCYUUUUUUUUUZVNOOGGGGGGGGGGGGMMMMMMMMMMEEEEEUTTTTRRRRRRRRRBIIIIIPTTTTTSSSSSSXXXXXUUUNNNNNNSSSSSS
+OOYOYYYYYSSSSSSSSSSSSSSSGGGGGHHHTTTDTTTTTCTUUUUUUUUUUUUUODOOOGGGGGGGGGGMMMMMMMMMMMMZUUUUUTTTTTTRRRRRRRBBIIIBBBBTTSSSSSSSSXXNNUNNNNNNNNNSSSSN
+OOYOOYYYGSSSSSSSSSSSSSSSGGGGGHHHHTTTTTZCCCTUUUUUUUUUUUUUOOOOOOOGGGGGGGGYMTMMMMMMMMMMUUUUATTTTTTRRRRRRRBBBBBBSBBSTTSSSSSSSSXXNNNNNNNNNNNSNNNN
+OBOOOOYBGGSSSSSSSSSSSSSSTGUGHHHHHHHTTTCCCCCUUUUUUUUUBBBOOOOOOOOPOOGGGGGYYYMMMLMMMMMMUUUUAATTTTTTRRRRRRBBBBBSSDSSTSSSSSSSSSXNNNNNNNNNNNNNNNNN
+BBBOOYYBGSSSSSSSSSSSSSSSTTIKIHRHHHIIECCCCCCUUUUUUUUUBBBOOOOOOOOOOOIOGGYYYYYLLLMMMMMMUUUUATTTTTTTRRRRRRRBBBBSSSSSSSSSSSSJJJJNNNNNJNNNNNNNNNNN
+BBBBBBBBBBSZSSSSSSSSSSSSIIIIIRRRRHISCCCCCCCUUUUUUUUUBOBBBOOOOOOOOOOOOOYYYYYYLLMMMMMMMUUUGGTTTTTTGRRRRRRBBBBSSSSSSSSSSSSJJJJJJJJJJNNNNNNNBBNN
+BBBBBBBBBBSZSSSSLSLSSSSSIIIIIRRRIIIICCYCCCCUUUUUUUUUBOBBSOOOOOOOOOOYYYYYYYYYLLUUUMZMMUUUUGKTTGTTGGRRRRRRBBSSSSSSSSSSSSSJJJJJJJJJJJNBBBBBBBNN
+BBBBBBBBBVSSSSSSLLLLSSIIIIIIRRIRIIIAACCCCCTUUUUUUUUUVOOBSOOOOOOOOOTTYYYYYYLLLUUUUUUUUUUUGGGTGGGGGGGGRRRRBBSSSSSSSSSSSSSJJJJJJJJJJJJJBBBBBBNN
+BBBBBBBBBSSSSSSSLLLLLIIIIIIIRIIRIIIJAAJJCCCUUUUUUUUUOOOOOOOOOOOOOOYYYYYYYYYLLUUUUUUUUUQUGGGGGGGGGGGCCRRRBBSSSSSSSSSSSSSJJJJJJJJJJJJJBBBBBBBN
+BBBBBBBBBSBBSSSLLLLLAAAILIIIIIIIIJJJAJJJCJJUUUUUUUUUVVVOOOOOOOOOOYYYYYYYYYYYYYUUUUUUUUQQGGGGGGGGGGGGCRCCSSSSSSSSSSSSSJJJJJJJJJJJJJJBBBBBBBBN
+BBBBBBBBBBBSSSLLLLLLLLLLLLIIIIIIJJJJJJJJCJJUUUUUUUUUVVVOOOOOOOOOOYJJYYYYYPYYYNNUUUUUQQQGGGGGGGGGGGGCCCCCSSSSSSSSSSSHSSJJJJJJJJJJJJJBBBBBBBNN
+BBBBBBBBBBBSSSSLLLLLLLLLLLIIIIIIXXJJJJJJJJJUUUUUUUJJVVVLQQQOOOOOOOOJYYYYYPPPPPNNUUUUUQQQUGGGGGGGGGGGCCCCSSSSSSSSSSSHHSJJJJJJJJJJJJJBBBBBBBBB
+BBBBBBBBBBBGSSLLLLLLLLLLLIIIIIIIXXJEEJJJJJJUUUUUUUJJJVVLQQXQOOOOOOUYYYYYYPNPPPNPPPUUUQQQQGGGGGGGGGGGCCSSSSSSSSSSHHHHHSOJJJJJJJJJJJJBBBBBBBBN
+BBBBBBBBBBPWLLLLLLLLLLLLLIIIIIIIXXXXEDDJJJJUUUUUUUJJJJQQQQQQQQQQQOUUYYYYYQPPPLPPPPOOQQQQGGGGGGCCCGGCCCSSSSSSSSSSHHHHHOOOJJJJJJJJJJJBBBBBBNBN
+BBBBBBBBWWWWWWALLLLLLLLLIIIIIIIXXXXXXDDJJJVUUUUUUUJJJQQQQQQQQAAUUUUUUUUYYQPPPPPPPPOSSSSSSSGGGGCCCCCCCCCCSSSSSHHHHHHHHHOOOJJJJJJJJJJJBBNNNNBN
+BBBBBBBBBBBWWWALLLLLLLLLLIIIIIIIXDXXXDDDVVVVVVVJJJJJJQQQQQQQAAAUUUUUUUYYYYPPPPPPPPPSSSSSSSGGICCCCCCCCCSSSSSSSSSSHHHHHOOOOJJJJJKKJJJJLSNSNNNN
+BBBBBBBBBBWWWWJJJLLLLLLLLLLIIIIIDDDXDDVIIVVVVVVVJJJJJTQQQQQQAUUUUUUUUUUUYUUPPPPPSSPSSSSSSSGGGCCCCCCCCCCSSSSSSSSHHHHGHOOJJJJJJKKJJLJLLSNSNNNN
+BBBBBBBBBWWWWJJJJJLLWLRJSIIIIIDDDDDDDDVVVVVVVVVPJJJJQQQQQQQQQGUUUUUUUUUUUUPPPPPPPSSSSSSSSSGCCCCCCCCCCCSSSSSSSSSSSSSSMJJJJJJJJJJLLLLLLSSSNNNN
+BBDDBBBDBWJJJJJJJJJJJJJJJIIIIIDDDDDDDDVVVVVVVVVVVJJQQQQQQQQQQQUUUUUUUUUUUUPPPPPPPSCSSSSSSSGCCCCCCCCCCCCSSCSSSSSSSSSSJJJJJJJJJJJLLLSSSSSSSSNS
+BPDDDDDDWWWJJJJJJJJJJJJIIIIIIIWDDDDDDDVVVVVVVVVVJJJQQQQQQQQQQQJUUUUUUUUUUUUUPPPPPPCSSSSSSSCCCCCCCCCCCCCCCCCSSSSSSSSSPJJJJJJJJJJJLLLSSSSSSSSS
+PPPNNDWWWWWJJJJJJJJJJJJIIIIIIWWWDDDDDDDDVVVVVVVVJJQQQQQQQQQJJJJUUUUUUUUUUUUPGPPPDDSSSSSSSSSSJJCCCCCCCCCCCSSSSSSSSSSSSJJJJJJJJJJJJSSSSSSSSSSS
+PNNNNNNWWRWJJJJJJJJJJJJJIIIIIWWWWDDDDDDDCVVVVVJJJJJJQJQJQJJJJJJUUUUUUUUUUUPPPPPPDSSSSSSSSSSACCCCCCCCCCCCCSSSSSSSLSSSJJAJJJJJJJOOOOSSSSSSSSSS
+PPNNNNNWRRWWJJJJJJJJJJJIIIIIIWWWWDDDDDDDCVVVVVVJJJJJQJQJJJJSJJJUUUUUUUUUUUPUFFPPDDSVSSSSSASAAACCCCCCCWWOSSSSSSSSSSSSSAAJJJAJJTSSSSSSSSSSSSSS
+PPNNNNNNNRWRRJJJJJJJJXJIIIIIIWWWWWDDDDDDDVWVVVVVJJJJJJJJJJJSJJJLLUUUUHUUUUUUFFPPFSSFSSSAAAAAAACCIIIJCWWWWSSSSSSSSSSSAAAAAAAAATTSSSSSSSSSSSSS
+PPNNNNNNRRRRJJJJJJJJXXXIIAIWWWWWWHDDADDIIVWWWWVJJJJJJJJJJJJSSSSSSUUUUUUUUUUUUFFJFFFFFFAAAAAAAAAIIIIIWWWWWSUUUUUUUUUAAAAAAAAAATTSSSSSSSSSSSSS
+NNNNNNNNNRRRRJJGGJXXXXXIAAAAWWWWGDDDAADLLWWWLLMLLLJJJJJJJJSSSSSSSSUUUUUUUUUUUJJJJFFFFFFFFAAKAAAIIIIIWWWWLSUUUUUUUUUAAAAAAAAAATTSSSSSSSSSSSSS
+NNNNNNNNNRRRRRGGGJXXXAAAAAAAWAWADDDDAADLLLWWLLLLLLLLJJJJJJSSSSSSSSSOPUUUUUKKCCJJJFFFFFFFFFAKKAIIIIIIWWWWWSUUUUUUUUUAAAAAAAAAATTTSSSSSSSSSSSS
+NNNNNNNNNRRRRGGGGGXXAAAAAAAAWAWAADDAAAAALLLLLLLLLLLLJJJJJJJBSSSSSSSPPPPUUKBKCKFFFFFFFFFFKKKKKAAAAIIIIWWAAAUUUUUUUUUAAAAAAAAAATTTTSSSJJSSSSSS
+NNNNNNNNNRRRRRRGGGGGAAAAAAAAAAAAAAAAYYYALLLLLLLLLLLJJJJJJJBBBSSSSSSSPPPKKKKKKKFFFFFFFFFFKKKKKKAAIIIIUUWAAAUUUUUUUUUAAAAAAAATATTTTTTSJJSSSSSS
+NNNNNNRNRRRRRRRGGGGWAAAAAAAAAAAAAAAAYYYZLLLLLLLLLHHHJJJJJJBBBSSSSSPPPPPPPTKKKKKKKKKKKFKKKKKKKKKLLIIIIIWWWYUUUUUUUUUAAAAAAATTTTTTTTJJJJJSJSJS
+NNNNNRRNRRRRRRRGGGGGGGGAAAAAAAAAAAAYYYYYLLLLLLLLLLHHHHJJJBBBFSXSSSSPPPPPPPCKKKKKKKKKKKKKKKKKKAALLIIIIILZYYUUUUUUUUUAAAAAAATTTTTTJJJJJJJSJJJS
+SQQNUURRRRRRRRRGGGGGGGGGAAAAAAAAAAYYYYYLLLLLLLLLLLLHHHJJJJBBBBBBSSPPPPPPPPKKKKKKKKKKKKKKKKKKKAALLIIIWWLZYYYYYYYAAAAAAAAAAATTTTTTJEJJJJJJJJJS
+QQQQQUUUURRRRRGGGGGGGGGGAAAAAAYYYYYYYYYLLLLLLLLLLLLHHHYJJJBBBBBBDPPPPSPPPAKKKKKKKKKKKKKKKKLKAALLLLLLLLLLYYYYYYYAAAAAAAAAATTTTTTJLJJJJJJJJJJE
+VQQQQQUUURRRRGGGGGGGGGGGGAAAAAYYYYYYYYYLLLLLLLLLLLLHHYYYYNBBBBBBDPPPPSPPPAKKKKKKKKKKKKKKKKLAALLLLLLLLLLLLLYYYYYAAAAAAATTATTTTTTJJJJJJJJJJJJJ
+VVVQQUUUUURRRRGGGGGGGGGGGAAAAAYYYYYYYYLLLLLLLLLLLLLHYYYYBBBBBBBBDPSSSSSPPAAKTKKKKKKKKKKLLLLLLLLLLLLLLLLLLYYYYYYYAAAAATTTTTTTTTTTJJJJJJJJJJCJ
+VVVVUUUUTRRRRRRGGGGGGGGGAAAEAYYYYYYYYYLLLLLLLLLLLLLYYYYYBBBBBBEBDSSSSSSSAAATTKKKKKKKKKKLLLLLLLLLLLLLLLLLLLLYYYYYYAAAAAAATAZZZZTTTJJJJJJJJJJM
+VVVUUUUUTTRRRRRRGJGGGUGXRRRERRRRYYYYYYYLLLLLLLLLLKYYYYYYYBBTWWEEWSSSSSSSSTTTTTTKKTKKKKLLLLLLLLLLLLLLLLLLLLFYYYYYYYYAAAAAAAZZZZZZZJJJJJJJJMMM
+VVVUUUUUUTRRRRUUJJUUUUXXXRRRRRRRYYYYZZYYYLLLLKKKKKKYYYYYYYWWWWWWWSSSSSSSSWWTTTTTKTKKKKLLLLLLLLLLLLLLLLLLLLYYYYYYYYGGGGGGGGGGZZZZZZJJJJJJJMMM
+VVVVUUUTTTRRRRUUUUUUUUXXXRRRRRRRVYZZZZZYYLLLLLKKKKYYYYYYYYWWWWWWWWSSSSSSSTTTTTTTTTTTKPPLLLLPZIZLLLLLLLLLLLYYYYYYYYGGGGGGGGGGZZZZZZZZZJJJJJMM
+VVVVQUTTTTRTRRUUUUUUUUXXRRRRRRRVVZZZZZZZYYLLKKKKKKKYYYYWYYWWWWWWWWWSSSSSTTTTTTTTTTTTKPPLPPPPZZZZZLLLLLLLTTYYYYYYYPGGGGGGGGGGZZZZZZZZMMJMMMMM
+VVVVVUTTTTTTRRUUUUUUUUUUURRRRRRRRRZZZZZZYGGLGKKKKKKWWWWWWWWWWWWWWWWWSSTTTTTTTTTTTTTTTPPPPPPPZZZZZZLLLLLLYYYYYYYYYPGGGGGGGGGGGGGGZZZZZMMMMMMM
+VVVVVTTTTTTTRUUUUUUUUUUUURRRRRRRRBZZZZZZZGGGGKGKKKKWWWWWWWWWWWWWWWSSSVRTTTTTTTTTTTTPPPPPPPPZZZZZZNLLLLZZYYYYYYYPPPGGGGGGGGGGGGGGZZMMMMMMMMMM
+YYYVTTTTTTTTRRUUUUUUUUUUURRRRRRRZBZZZZZZGGGGGGGGGKKKWWWWWWWWWWWWWVVVVVVTTTTTTTTTTTTTTPPPPZZZZZZZZNNNNLLPPYYYYYYPPPGGGGGGGGGGGGGGZZMMMMMMMMMM
+YYYYYTTTTTTTTUUUUUUUUURURRRRRRRZZZZZZZZGGZGGGGGGKKKKWWWWWWWWWWWVVVVVVVVTXTTTTTTTTTTQPPPPPZZZZZZZZNNNNLNPPYYYYPYPPPGGGGGGGGGGGGGGZZZMMMMMMMMM
+YYYYTTTTTTTTMMMUUUUHRRRRRRRRRRRRVZZZZZZZZZZGGGGBBBBKWWWWWWWWWWVVVVVVVVVVVVTTTTTTTTQQQPPPZZZZZZZZZZNNNNNPPYZYYPYPPPGGGGGGGGGGGGGGOOZZZZMMMMMM
+YYVVIIETTTTTMMMUUUURRRRRRRRRRQCQQAAZZZZZZZGGGGGBBKKKKKMWWWWWWWWVVVVVVVVVTTTTTTTTTHQQZZZZZZZZZZZZZZNJNPPPPPYYYPPPPLLLLLLGGGGGGGGGOOZZZZMMMMMM
+YYVIIIETTTTTTMMUUURRRRRRRRRRQQQQQQQQZZZZZZXGGGKKKKKKKMMMWWWWWWWWVVVVVVVVTTTTTTTTTTQQQZZZZZZZZZZJZZJJNJPPPPPYPPPPPLLLLLLGGGGGGGGGOOZZZMMMMMMM
+VVVVVEETTTTTTTMMMMRRRRRRRRQQQQQQQMQXZZXXXXXGGKKKKKKKMMMMMMWWWWWWWVVVVVVVTVTTTTTTTTQQQQQZZZZZZZZJJZZJJJPPPPPYIIPPPPLLDLLGGGGGGGGGZZZZZMZMMMMM
+VVVJVEEGTTTTTMMMMMRRRRRRRRRQQQQQQQXXXZXXXKKKGKKKKKKKMMMMMMWWWWWWUUVVVVVVTVTTTTTTTTQQQWQQQZZQZZZJJJJJPPPPPPIIIIIIIPPLLLLGGGGGGGGGVZZZZZZZMMMM
+VVVVOEEEEETTTMMMMMMRRRRRRRRQPQQQQQXXXZZXXKKKKKKKKKKKMMMMMMMMWWWWWUBBVVVVTVTTTTJTWWWWQWWQQQZQZZZJJJJPPPPPPPPIIIIIPPPPPLLLLHHOOOOOZZZZZZZZMMMM
+VVVVVVEEETTTTMMMMMMMRRRRRRPPPQQQQXXXXXXXXKKKKKKKKKKKMMMMMMBMBWBBBBBBVVVVVKKUUTJJWWWWWWWQQQQQQZJJJJJPPPPPPPPPPIPPPPPPPHHHHHOOOOOOOZZZZZZZZZMM
+VVVVVVEEEETTTMMMMMMMRRRRRPPPPAQQXXAXXXXXXAAAKKKKKKKMMMMMMMBBBBBBBBBBBKKKKKKUUUWWWWWWWWWQQQQQQZZJJJJJJPPPPPPPPPPPPPPPPHHHHHOOOOOOZZZZZZZZZMMM
+PVVVVVSEEEEEMMMMMMMMMRRRRPPPPAAAAAAAXXXXXAAAAAAAKARMMMMRRMHBBBBBBBBBKKKKKKUUUWWWWWWWWWWWQQQQQZZJJNJPPPPPPPPPPPEEPPLPHHHHHOOOOOOOZZZZZZZZZMMM
+VVVVVVSEEEEEUUUUUMMMMMRRRPPPPAAAAAAAXXXXAAAAAAAAAARMRRRRRRRRBCBBBBBBKKKKKKKWWWWWWWWWWWWWQQQQQNNNNNJPPPPPPPPPPPEEZPPHHHSSHOOOOOOOZZZZZZAZAAMM
+VVVVVVVUUHHHGGUUUUMMMMRPRPPPPAAAGKKAAXXAAAAAAAAAAARRRRRRRRRRVBBBBBBBKKKKKKKWWWWWWWWWWWWQQQQQQNNNNNJPPPPPPPPPPPEEEPPEEHSSOOOOOOOOOZZZZZAAAAMM
+VVVVVVVUUHHHGHUUUUUUUUPPPPPPPGGGGKKAXXAAAAAAAAAAAARRRRRRRRRRRBBBBBBBBKKKKKKUTWWWWWWWWWQQQQQQQQNNNJJPPPPPPPPPPPREEEEESSSSSSOOOOOOOZZZZZAAAAAA
+VVVVVJVUUHHHHHUUUUUPPPPPPPPPPGGGKKGXXXAAAAAAAAAAAARRRRRRRRRRREEBBEEEBBKKKLKTTTTWWWWWWWWWQQQQQQQQNJJJJJPPPPPPPPEEEEEEESSSSOOOOOOOOOOZZAAAAAAA
+VVVVVJVUUHHHHHHUUUUPWWPPPPPPPPGGGGGGXXAAAAAAAAAAAAARRRRRRRRRREEWWWWWWWWKKKTTTTTWWWWWWQQQQQQQQQQNNNNJJJPPPPPPPEEEEEEEESSSSOOOOOOOOOOWAAAAAAAA
+UUUUUUUUUUHHHUUUUUPPPWPPPPPPPPGGGGGGXXAAAAAAAAAAAYRRRRRRRREEEEFWWWWWWWWKKTTTTTTWWWWWWQQQQQQQQQQUUNNJJJJJJPPPEEEEEEEOSSSSSNNNNNNONOOOAAAAAAAA
+UUUUUUUUUHHHHUUUUUPPPWWPPPPPPPGGGGZZAAAAAAAAAAAAAYYRRRRREEEEWWWWWWWWWWWKKKKKKKKKKWWWWQQQQQQQQQQUYNNYYYJJJPPPXEEEEEOOOSSONNNNNNNNNNNAAAAAAAAA
+UUUUUUUUHHHHHHUUUUUUUWWPPPPPPPPGGGPPAAAAAAGZAAZZYYYRRRRRREEEWWWWWWWWWWWKOKKKKKKKKIIIIQQQQQQQWWUUYYYYYYYJJYXXXEEFOYOOOOOOONNNNNNNNNNAAAAAAAAA
+UUUFEFBBBHWWUUUUUUWWWWWWWPPQPPPPPPPPEAAFAAZZVZZZYYYRRRRREEEFWWWWWWWWWWWWWWWWWWWWKIIIHQQQQQQQWWUUYYYYYYYYYYXXXEXOOOOOOOONNNNNNNNNANAAAAAAAAAA
+FFUFFFBBBBWWWWUUUWWWWWWWWPPQQQPPPPPPPPYZZZZZZZZZYYYFREEEEEFFWWWWWWWWWWWWWWWWWWWWKIHIHQQQQQWWWWYYYYYYYYYYYYXXXXXOOOOOOONNNNNNNNNNAAAAAAAAAAAA
+FFFOFFFBBWWWWUUUWWWWWWWKKQPQQQPPPPPPPPYYZZZZZZZZZYFFEEEEEFFFFWWWWWWWWWWWWWWWWWWWKIHHHQQQQQWWWWWWWYYYYYYYYYYYYYOOOOOOOONNNNNNNNNNNAAAAAAAAAAA
+FFOOFFBBBWWWWWWWWWWWWKKKKQQQQQPPPPPPPPPYYZZZZZZZZZFFEEEEEFFFFWWWWWWWWWWWWWWWWWWWKHHHHQHHHWWWWWWWWWWWYYYYYYYYYIOOOOOOOOOONNNNNNNNNEAIIAAAAAAA
+FFFFFFFBFFFWWWWWWWWWWKKKKQKQPQPPPPPPPPPPPZZZZZZWWWFFFFFFFOFFFWWWWWWWWWWMKKKKKKKKKHHHHHHHWWWWWWWWWWWWYYYYYYYIIIIOOOOOOONNNNNNNNNNEEEEEIAAAAAA
+XFFFFFFFFFFWWWWWWWWWWWKKKKKQPPPPSSPPFPPZZZZZZZZWWWFFFFFFFFFFFWWWWWWWWWWKKKKKKKKKJJJHHHHHHWWWWWWWWRYYYYYYYYYIIIIIOOOOOONNNNNNNNNEEEEEEAAAAAAA
+XFFFFFFFFFFFFWWWWWWWWKKKKKKKSPPSSSSSSSPPZZZZZWWWWWFFFFFFFFFFFWWWWWWWWWWKKKKKKKKKJJTTYHHHHHWWWWWWWWJYYYYYYYIIIIIIOOOOONNNNNNNNNNEEEEEENAAAAAA
+FFFFFFFFFFFWWWWWWWWKKKKKKKKPSSSSSSSSSSPZZZZZZZZWWWWFFFFFFFFWWWWWWWWWMMKKKKKKKKKKJJJTYHHHHWWWWWWWWWYYYYYYYYIIIIIIOOOOOONNNNNNNNNEEREEEEAAAAAB
+FFFFFFFFFRRRRRRRWKKKKKKKKKPPSSSSSSSSSZZZZZZZZZZZWWWFFFFFFFFWWWWWWWFFJJKKKKKKKKKKJJJJYYYYHWWWWWWWWWWWYYYYYYYYIIIIOOOOOOONVVNNNEEEEEEEEEAATABB
+FFFFFFFFFFRRYRRRKKKKKKKKKKKKDSSSSSSSSZZZZZZZZVWWWVVFFFFFFUFWWWWWWWVFFJKKKJJJJJJJJJJJYYYYYFWWWWWWWWWWYYYYYYYYIIIIOOOOOOOOAVVNNNEEEEEEEEEEEAEB
+FFFFFFFFFFRRRRRRRVKKKKKKKKKSSSSSSSSXSSZZZZZZZVVVVVVFFFFFFUFWWWWWWWVVVJJJJJJJJJJJJJJFYYYYWWWWWWWWWWYYYYYYYYYIIIIIIOOOBBVOVVVVVEEEEEEEEEEEEEEE
+FFFFFFFFFFFRRRRRRVRKKKKKKKKKKSSSSSSSSZZZZZZZRRVVVVZZFFVVVFFWWWWWWWVVVJJJJJJJJJJJJJNNNNNWWWWWLWWWWYYYYYYYYIIIIIIIIIOBBVVVVVVVVVEEEEEEEEEEEEEE
+FFFFFFFPPPRRRRRRRRRRKKKKKKKKKSSSSSSSSSZZZZZZRRVVVVVZZZVVVVVWWWWWWVVVJJJJJJJJJJJJJJJJNNNNWWWWWLLWLLLLLLYIIIIIIIIIIMMBBVVVVVJJJJJEEEEEEEEEEEEE
+FFFFFFFPPPRRRRRRRRKKKKKKKKKKKKSSSSSSSSHZZZZZRVVVVVVVVVVVVVVVVVVVVVVVVVJJJJJJJJJJJJJJJNNNNNWWWWLLLLLLLLIIIIBIIIIIMMMMBVVVJJJJJJJJEEEEEEEEEQED
+FFFFFFRPPPRRRRRRRRRKKKKKKKKKKHHSHSHHLLBXZBRRRRRVVVVVVVVVVVVVVVVVUVVVVJJJJJJJJJJJJJJJNNNNNWWWWWLLLLLLLLIIIBBBIIIIMMMMBVVJJJJJJJJJJJEEEEEEEEED
+FEFFFFRPPPRRRRRRRRRKKKKKKKKAHHLHHHHHBLBBBBRRRRVVVVVVVVUUVUUUUUUUUUBBBBBJJJJJJJJJJNNNNNNNNWWWLLLLLLBLBBBSSBBBBBIIMMMMMVFJJJJJJJJJJJJJEEEEEEEE
+EEBBBFRPPPRRRRRRRRRRHKKKJKKJJHHHHHHHBBBBBBRRVRRVVVVVVUUUVVUUUUUUUUUEBBBBBBJJBBBNNNNNNNNZNWWWLLLLLLBLBBBBBBBBBIIIMMMMMMEAJJJJJJJJJHJJEEEEEEEE
+EEBBBBRPPPRRRRRRRRRRHHHHJKKJCHHHHHHVBBBBBBBRVVVVVVVVVUUUUUUUUUUUUUUBBBBBBBBBBBBNNNNNNNZZZWWWWLZLLLBBBBBBBBBBOOIIIIMDDMEEJJJJJJJJJJJJOJQQEQSE
+EEBLBMMPPPRRRRRRRRRRHHJJJJJJCHHHHHHVBBBBBBBVVVVVVVVVVUUUUUUUUUUUUUUBBBBBBBBBBBBNBBNNNNNZZWWWWWZZZBBBBBBBBBBOOOIIIIDDDMEDJJJJJJJJJJJJJJQQQQQH
+EEBBBBBPPPRRRRRRRRRRRHHJJJJJJHHHHHVVBBBBBBYYVVVVVVVVVUUUUUUUUUUUUUUBBBBBBBBBBBBBBBNNNZZZZZZZZZZZZBBBBBBBBOOOOOIIIODDDDEDJJJJJJJJJJJJJJQQQQQH
+EEEBBBBPPPRRRRRRRRPPPJJJJJJJJJHHHHVBBBBBBBVVVVVVVVVVVVUUUUUUUUUUUUBBBBBBBBBBBSBBBZZZZZZZZZZZZZZZZZBBBBBOGOOOOOOOOOODDDDDJJJJJJJJJJJSSQQQQQQQ
+BBBBBBBBJBRPPRRRRRPPPJPJJJJJJJJKHVVBBGGBGBGGVVVVVVVVVVVUUUUUUUUUUUBBBBBBBBBBBSBXXZZZZZZZZZZZZZZZZBBBBBBOOOOOOOOOOODDDDDDJJJJJJJJJJJQQQQQQQQQ
+KBBBBBBBBBDPPPRRRPPPPPPPPPPJJJJKHHVBBHGGGGGVVLVVVVVVVVUUUUUUUUUKKUKBBBBBBBBBSSSSSSSZZZZZZZZZZZZZZBBBBOOOOOOOOOOOOODDDDDDDDDDJJJJJJJJQQQQQQQQ
+KBBBBBBBBBDPDPRRPPPPPPPPPPPJJWJJHWBBBHHGGMGVVVVVVVVVVVVUUUUUUUUKKKKBBBBBBBBSSSSSSSSSZZZZZZZZZZZZBBBBBBOOOOOOOOOOOIOODDDDDDDDDDDDDQQQQQQQQQQQ
+BBBBBBBBBBDDDPRPPPPPPPPPPPPJPWWWWWWWHHHGMZZZZZZZZVVVVVVHKKKKKKKKKKKUEBBBBBBSSSSSSSSSZZZZZZZZZZZZBBBBBBOOOOOOOOOOOOOODDDVDDDDDDDDDDQQQQQQQQQQ
+BBBBBBBBBBDDDDDDPPPPPPPPPPPPPWWWWHHHHHHHMZZZZZZZZVVBVVVHCKKKKKKKKUUUUGGBBBSSSSSSSSSSZZZZZZZZZZZZZZOOOBOOOOOOOOOOOOOOVVVVDDDDDDDDDDDDDQQQQQQQ
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+MBBBBBBBBJDDDDDDDDLPPPPPPPPPPPPWHHHHHHHHHZZZZZZZZMMMMCCCCKKKKKKKUUUUUUUYYYYYYYYSSSSSZZZZZTTTTTTTTOOOOOOOXOOOOOOOOOOVVVVVZZZZZZDDQQQQQQQQQQQQ
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src/bin/12.rs

@@ -0,0 +1,157 @@
+use std::collections::HashSet;
+
+static DIRECTIONS: [(isize, isize); 4] = [(1, 0), (0, 1), (-1, 0), (0, -1)];
+
+fn dfs(map: &[Vec<char>], visited: &mut [Vec<bool>], x: usize, y: usize) -> (usize, usize) {
+    visited[y][x] = true;
+
+    let mut area = 1;
+    let mut perimiter = 0;
+    for (nx, ny) in DIRECTIONS.into_iter().filter_map(|(dx, dy)| {
+        Option::zip(
+            x.checked_add_signed(dx).filter(|&nx| nx < map[0].len()),
+            y.checked_add_signed(dy).filter(|&ny| ny < map.len()),
+        )
+    }) {
+        if map[y][x] == map[ny][nx] && !visited[ny][nx] {
+            let (narea, nperimiter) = dfs(map, visited, nx, ny);
+            area += narea;
+            perimiter += nperimiter;
+        } else if map[y][x] != map[ny][nx] {
+            perimiter += 1;
+        }
+    }
+
+    perimiter += DIRECTIONS
+        .into_iter()
+        .filter(|&(dx, dy)| {
+            Option::zip(
+                x.checked_add_signed(dx).filter(|&nx| nx < map[0].len()),
+                y.checked_add_signed(dy).filter(|&ny| ny < map.len()),
+            )
+            .is_none()
+        })
+        .count();
+
+    (area, perimiter)
+}
+
+fn dfs_border(
+    map: &[Vec<char>],
+    visited: &mut [Vec<bool>],
+    border: &mut HashSet<(usize, usize, usize)>,
+    x: usize,
+    y: usize,
+) -> (usize, usize) {
+    visited[y][x] = true;
+
+    let mut area = 1;
+    let mut perimiter = 0;
+    for (i, nx, ny) in DIRECTIONS
+        .into_iter()
+        .enumerate()
+        .filter_map(|(i, (dx, dy))| {
+            Option::zip(
+                x.checked_add_signed(dx).filter(|&nx| nx < map[0].len()),
+                y.checked_add_signed(dy).filter(|&ny| ny < map.len()),
+            )
+            .map(|(nx, ny)| (i, nx, ny))
+        })
+    {
+        if map[y][x] == map[ny][nx] && !visited[ny][nx] {
+            let (narea, nperimiter) = dfs_border(map, visited, border, nx, ny);
+            area += narea;
+            perimiter += nperimiter;
+        } else if map[y][x] != map[ny][nx] {
+            border.insert((i, x, y));
+        }
+    }
+
+    for (i, _) in DIRECTIONS.into_iter().enumerate().filter(|&(_, (dx, dy))| {
+        Option::zip(
+            x.checked_add_signed(dx).filter(|&nx| nx < map[0].len()),
+            y.checked_add_signed(dy).filter(|&ny| ny < map.len()),
+        )
+        .is_none()
+    }) {
+        border.insert((i, x, y));
+    }
+
+    (area, perimiter)
+}
+
+fn main() {
+    let text = std::fs::read_to_string("input/12-1.in").unwrap();
+
+    let map = text
+        .lines()
+        .map(|l| l.chars().collect::<Vec<_>>())
+        .collect::<Vec<_>>();
+
+    let mut visited = vec![vec![false; map[0].len()]; map.len()];
+
+    let mut sum = 0;
+
+    while let Some((x, y)) = visited
+        .iter()
+        .enumerate()
+        .flat_map(|(y, l)| {
+            l.iter()
+                .enumerate()
+                .filter(|&(_, &b)| !b)
+                .map(move |(x, _)| (x, y))
+        })
+        .next()
+    {
+        let (area, perimiter) = dfs(&map, &mut visited, x, y);
+        sum += area * perimiter;
+    }
+
+    println!("{sum}");
+
+    let mut visited = vec![vec![false; map[0].len()]; map.len()];
+
+    let mut sum = 0;
+
+    while let Some((x, y)) = visited
+        .iter()
+        .enumerate()
+        .flat_map(|(y, l)| {
+            l.iter()
+                .enumerate()
+                .filter(|&(_, &b)| !b)
+                .map(move |(x, _)| (x, y))
+        })
+        .next()
+    {
+        let mut border = HashSet::new();
+        let (area, perimiter) = dfs_border(&map, &mut visited, &mut border, x, y);
+
+        let mut borders = 0;
+        while let Some(&v) = border.iter().next() {
+            let (i, x, y) = border.take(&v).unwrap();
+            borders += 1;
+
+            let (dx, dy) = DIRECTIONS[(i + 1) % 4];
+
+            let mut j = 1;
+            while Option::zip(x.checked_add_signed(dx * j), y.checked_add_signed(dy * j))
+                .filter(|&(nx, ny)| border.remove(&(i, nx, ny)))
+                .is_some()
+            {
+                j += 1;
+            }
+
+            let mut j = -1;
+            while Option::zip(x.checked_add_signed(dx * j), y.checked_add_signed(dy * j))
+                .filter(|&(nx, ny)| border.remove(&(i, nx, ny)))
+                .is_some()
+            {
+                j -= 1;
+            }
+        }
+        sum += area * borders;
+    }
+
+    println!("{sum}");
+}