From 1dfae1e03aee84b73d0114dfa16d827373ea6ce7 Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Thu, 9 Dec 2021 23:08:40 +0000
Subject: Added day 9

---
 9.c     |  72 +++++++++++++++++++++++
 9a.c    | 107 ++++++++++++++++++++++++++++++++++
 data.8  | 200 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 data.9  | 100 ++++++++++++++++++++++++++++++++
 data.9a |   5 ++
 5 files changed, 484 insertions(+)
 create mode 100644 9.c
 create mode 100644 9a.c
 create mode 100644 data.8
 create mode 100644 data.9
 create mode 100644 data.9a

diff --git a/9.c b/9.c
new file mode 100644
index 0000000..fc8d0e4
--- /dev/null
+++ b/9.c
@@ -0,0 +1,72 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#define MAX_SIZE 256
+
+static char *ReadLine(char *p, size_t size, FILE *fp)
+{
+    if ((p=fgets(p, size, fp)))
+    {
+        size_t l = strlen(p);
+
+        while(l && p[l-1] == '\n')
+        {
+            p[--l] = 0;
+        }
+    }
+
+    return p;
+}
+
+static int Lowest(char map[MAX_SIZE][MAX_SIZE],
+                  int x, int y, int width, int height)
+{
+    char val;
+
+    val = map[y][x];
+
+    return (y == 0 || map[y-1][x] > val) &&
+           (y == height - 1 || map[y+1][x] > val) &&
+           (x ==0 || map[y][x-1] > val) &&
+           (x == width -1 || map[y][x+1] > val);
+}
+
+int main(void)
+{
+    char buff[0x8000];
+    char map[MAX_SIZE][MAX_SIZE]={0};
+    int map_height = 0;
+    int map_width = 0;
+    int sum = 0;
+    int x = 0;
+    int y = 0;
+    int f = 0;
+
+    while(ReadLine(buff, sizeof buff, stdin))
+    {
+        map_width = strlen(buff);
+
+        for(f = 0; f < strlen(buff); f++)
+        {
+            map[map_height][f] = buff[f] - '0';
+        }
+
+        map_height++;
+    }
+
+    for(y = 0; y < map_height; y++)
+    {
+        for(x = 0; x < map_width; x++)
+        {
+            if (Lowest(map, x, y, map_width, map_height))
+            {
+                sum += map[y][x] + 1;
+            }
+        }
+    }
+
+    printf("sum = %d\n", sum);
+
+    return 0;
+}
diff --git a/9a.c b/9a.c
new file mode 100644
index 0000000..ea80d5f
--- /dev/null
+++ b/9a.c
@@ -0,0 +1,107 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#define MAX_SIZE 256
+
+static char *ReadLine(char *p, size_t size, FILE *fp)
+{
+    if ((p=fgets(p, size, fp)))
+    {
+        size_t l = strlen(p);
+
+        while(l && p[l-1] == '\n')
+        {
+            p[--l] = 0;
+        }
+    }
+
+    return p;
+}
+
+static int Lowest(char map[MAX_SIZE][MAX_SIZE],
+                  int x, int y, int width, int height)
+{
+    char val;
+
+    val = map[y][x];
+
+    return (y == 0 || map[y-1][x] > val) &&
+           (y == height - 1 || map[y+1][x] > val) &&
+           (x ==0 || map[y][x-1] > val) &&
+           (x == width -1 || map[y][x+1] > val);
+}
+
+static int BasinSize(char map[MAX_SIZE][MAX_SIZE],
+                     char fill[MAX_SIZE][MAX_SIZE],
+                     int x, int y, int width, int height)
+{
+    if ((x < 0 || x == width || y < 0 || y == height) ||
+        (map[y][x] == 9 || fill[y][x]))
+    {
+        return 0;
+    }
+    else
+    {
+        fill[y][x] = 1;
+        return 1 + BasinSize(map, fill, x - 1, y, width, height) +
+                   BasinSize(map, fill, x + 1, y, width, height) +
+                   BasinSize(map, fill, x, y - 1, width, height) +
+                   BasinSize(map, fill, x, y + 1, width, height);
+    }
+}
+
+static int Compare(const void *a, const void *b)
+{
+    const int *pa = a;
+    const int *pb = b;
+
+    return *pa - *pb;
+}
+
+int main(void)
+{
+    char buff[0x8000];
+    char map[MAX_SIZE][MAX_SIZE]={0};
+    char fill[MAX_SIZE][MAX_SIZE]={0};
+    int max[3] = {0};
+    int map_height = 0;
+    int map_width = 0;
+    int x = 0;
+    int y = 0;
+    int f = 0;
+
+    while(ReadLine(buff, sizeof buff, stdin))
+    {
+        map_width = strlen(buff);
+
+        for(f = 0; f < strlen(buff); f++)
+        {
+            map[map_height][f] = buff[f] - '0';
+        }
+
+        map_height++;
+    }
+
+    for(y = 0; y < map_height; y++)
+    {
+        for(x = 0; x < map_width; x++)
+        {
+            if (Lowest(map, x, y, map_width, map_height))
+            {
+                int basin = BasinSize(map, fill, x, y, map_width, map_height);
+
+                if (basin > max[0])
+                {
+                    max[0] = basin;
+
+                    qsort(max, 3, sizeof(max[0]), Compare);
+                }
+            }
+        }
+    }
+
+    printf("product = %d\n", max[0] * max[1] * max[2]);
+
+    return 0;
+}
diff --git a/data.8 b/data.8
new file mode 100644
index 0000000..93e8577
--- /dev/null
+++ b/data.8
@@ -0,0 +1,200 @@
+gfeabcd adecfb gcedb cef efgdc decabg cbfg edfga fdegcb cf | fc faedg fdage fec
+bcfegd fdceg ecgfadb fdae af cdeagf afc abdgc gcadf gfbace | cefdbg afgedc bcagd gedcf
+gbf bagdec fgdbae cfbd bgacd fb fbcaegd dfgbac gbfca gecaf | gadcfb abgcf bdcgea gbf
+eagcf cdgbaf cbadg fbcdgea cebfad fb fdgb abf gcdbea cgabf | bfdg dgacb gacef bafcg
+bgface cfadb gfc gcfba febg aedcgfb bceag cdgaeb adfecg gf | acfdb fabdc efagdc facbd
+bfegac adbfg ebagf beafgcd gfeadc age cgedbf gfceb eabc ae | acbe gfcbea aefgb abdgf
+bfeag cbae cbg bc cbaefg cfdga fgdbec ebadgf eacgfdb gabcf | bfgcea eabc eagfb bc
+abdcfg aebfd fbcade cdbge cfae eafcgbd dcabe bca degfba ca | ecfa fcadegb edbfag abc
+dfcgea efcbg ecda fadgbc fac bdacegf ac feabgd afgde ceagf | fdgae abgdfc egcfa fagde
+gfd gdcab fgdcae ecdfb bfdgc dacbef fbeg fg fdcgbe cdagbfe | bacgd cfdbea efacdg bcaefd
+eb afbgd gafbe bef gacdfb gdecfab aecfg egdb defgab bdaefc | gacfbd bfaecd gabfdc bef
+ecfb cbdfeg fgbadec fgcdb egf cefdg eagdc fbcdag fe gadbfe | fbgade bedfag gafbdc ecfdg
+bafcdg gbd dbcgef ecgdf cbged cgabe faebgcd cgfeda db debf | bdg efdgc fbed gbcde
+gdfceab afced decafb gadfc fg agdbc befcga fegd cgf cfegad | egdf ecafbg gbcda dcagf
+eca ea efda cfbda badgcf dbcea edcfab abfcdeg bagfce cbdeg | efad fedcba fgcbea adfbce
+gdefbca cf acbfg cegbda begca fbc gfebac afce gbdfa bdfgec | cbf bfc gecbaf cbafg
+afcebd agebfc fbcea eadfbg bdf cdfa dfecb df cbdfgea becgd | ceagbf fcda becfd ebfac
+ecb adgfeb fedbgca efac cfdegb egbaf ec bgcda gefbca cgaeb | afbdgce bec ec feca
+eacdb dfcabe dg fdabgc cdg gaed cbaged gecdb ebgcf dagefbc | debgc dgaceb gcd fdebca
+cega gdbefac gfdcb efbgca ga afg cgbaf aecfb ceabdf edgbaf | fedagb dbafce ga ga
+efbadc acgde fagcde fe dcaebg edfg acgef cbagf fae acfebgd | ef badcef dfge gecfa
+cbgfa cbae dabgef ba bag fcgea fdcage gfbcd cgbdaef gfecab | aefbgd bfgac gebacf bgfac
+dgfbce fgc bfcda egdfa gc fgedab acgdf acedgf aegc fbcgade | dfagc bgdafe aegfd egfda
+dgfa bedfc badcf agfbcd af eadbcg bfegca bfa cgabdef bgadc | bgdacf dcfba fcbda gbedafc
+aceg gdaef fcbegda dcefab afcedg abgdfc cadef agf degbf ag | bdgfe bacfgd cadfe fcgeabd
+bgefcd edg acdegb edcba cbdefa cfaeg beacgfd egcda dg dbga | efagc abcdegf adfceb dg
+faedbc gabde becfgd caebf acfg eacbg cgabfe cdebfga gc gcb | cdgebf cefab abdfce gdcefb
+de cgdfb edbg dbacfge cdfeg cebdgf agcef afbcgd dce dbfcea | beadfgc gbcadf dgcef degb
+egcafb cgadfbe gdace fd bafce cedabf bgdefa dcfb afd ecafd | gaefbd dfcb aebcf gcabfe
+cb beafcd bdgacf cdb bgac edgbfac cgfed bcgfd bgfdae gdabf | bafdg gcba fbgcd cegdf
+fceba ag degafbc bfcga bcafeg agf bafedc gace bfdcg fedbga | bdefca fcgbd cbafe cgbdf
+cafbge ce fbcea fecgdab aec adbcgf fbgca bgec baedf fegdca | defab bcfae ecgb aec
+dgbc dagfcb acfgbde bad adcfg dabfc gacdef aebdgf cabef bd | acfdb defgca dbegfac gfdca
+ecdf degfb adbge fcbgea dbgfec gfd df egfcb gacdebf cdfgba | cgbdfe gfd cfegab gfabce
+defcbga fcade efbac fb gacdbe abceg abcdgf egbf fcbgae bfa | befg cabdge eafcb bf
+cfbdae cg decbfag egfab fgdc dcbfe fegbc gce gdebca bfdgec | dcfg eadgcb ebdfc gfdcbe
+eagcdf cfaeg dgfe bdcefa gcabfed cgbda cegfab dae cagde de | dae adbecf edfcga fdge
+egfa gfbeac cfbag af fcgbe egbdfc abf cgbda ebfadc gbaedfc | cagefb edcbgf gebfc egcfb
+gda ga bcadge gfea dcbgef adcfb fdebg cgbfdae gfdaeb fabdg | fegbd egaf dafgeb gda
+gefad fegbad adecbfg db bed eacgb fcdgeb agdbe adbf acgfde | fabedcg bed gfadeb gedafc
+fb cbefa baf dfbgca edfac gefbac eadbgc efbg gfecbad aecgb | dbacfeg degabc fgacbed febg
+cbgfad eabcfgd cfdeg fbd adegb fb cfeb egbcfd fbegd agdefc | fdaegc febc fb ebgad
+dbfgc badc cfdabg fgaceb degfab facegdb dgb efgcd fcagb db | gfbca cgfbd gacfbed fbgdc
+efgcbd efbdc ef febdag dagfbc fcge bfdcg dabcefg edf ecdba | cbdegf defabg dcgabf bcade
+ecdfbga cbdeaf bfgdc fca eagdfc eafdb bdfca ca caeb gfeadb | cbae dcbfa acf fgcbd
+gdefcba bafd efcdab gecdbf fdc becfa gceda fd cafde baecgf | dfaec cabedf abcfeg df
+cfb daefb bgfcde dgacb edfcagb acfe fdbcea dcafb cf febagd | fecdba dfcageb fabcd ceaf
+adgbec fcgb badgecf dagcb bagefd fdb bf dcbfa bfadgc cfdea | fb efdac cfdba gadcb
+afcgd bac gdebfca bcgaed afbcd ecdfgb dcfbe ba befa eafdbc | dcgfa dgbfce ab afcbed
+gbcdaf fdgac bagde cgdbaef eabgcf bf gecdfa gbafd cdfb fgb | aecgdf bdega gafebcd aefgbc
+gfeb cadfg bdfga aefgdb bgd bagdcfe bgeacd gb cebdfa efbda | dafebc bfadge dgb adcfg
+cda dageb fgebda bfcdage dcbeag cgade cefbad ca cbga cfdge | gbadec febcad beadg cfbdea
+gdabf eadgf fe defagcb abef feg gabcdf cedag dafgbe edgcbf | abgfde gedafcb cgeda adgec
+fbd gfeba fgecad edafgbc dfcbga abdgf cadfg cgdb bd aecfbd | agfcbd ebacfd bafdg dagcf
+cadefb cgde eg aebfcg fdbagce afdceg fbagd aeg dfage aedfc | gdaef fedca eg ecabdf
+dgbeaf fcbdga ae agfcd egabdcf deac dcgfae acgfe fbceg gea | aecd dace gcbfe gcfea
+dafeg fcg degbac gcdbe dcgef bdegcf gedbcfa cf ebfacg bcfd | agfebdc cegdf cf cf
+bdfcea bdgae ecbga dbg fegbda bdefa dg dbacgf geafbdc efgd | bdg gefd cagbe debga
+aegfdb afcbd cdaebfg dgafbc cagb ba dcefb fba cdagf fgadec | fedcb acbg bfcdga gfcaed
+bfagcd agfb afcdg fcegadb dfgecb gb adbec gabdc efacgd gbd | eacbd adcfg fbgadc dbgca
+fcedg dfgbea ea fcbadeg ade agefdc afcdb egca ceadf fegcdb | dfgce efcgdb dgecbf cfabd
+dfea ed agdfebc eabfc bcdgfe edc cdbga ecbda aefdbc acfgeb | bdaec abfec gbedcf acbde
+dgefcb fbcaeg fbcga bgfcaed bfgda dcbfag fgd cfda edbga fd | bgcfae abgdf acfgbe abegd
+dgabfc cgdfe afd fdcae af agfe decba fcebdg dgfcbea dgfcae | fcaed fcabdg eafg fa
+gafce debca gdfeca dfag dacbfeg fcbedg ceagbf fdc fd cadef | ecfad gcbefa begacf edbcgf
+daceg efdcbg fcgad dbeca bdface bcfagde abge ged aecgdb ge | ecgdbf egcad eg aebg
+fdbace debagc cgbef degba bacfedg gfda afb edfgba gbefa fa | fbdgcea befacd cdaebg fbaegd
+fgbdea dg gdfb gfcebad abfeg afecgb dagbe edcgfa cdeba edg | egd fbgd dge eacdb
+ge agdcfb fdcag fcbgaed degcf eadg bdcef acefdg bcfaeg gfe | aecfdg eg dcgfa caegbf
+bcgef gfdb bgfcae fcadbge cedbg edafcg dg dcebgf bacde dge | agefbc bgefcd bedfcg dg
+fga ga dcgfb dgeabf beadfgc eadfc gbca dcagf fadcbg bcgfed | ga dgcfba agcdf befcdg
+dbag cafgbe cdfgaeb gabcde eabdc fdace bd bgcea gdecbf bcd | afdec abegfc gebacf edgabc
+fcde cbadefg gdcefb bcdagf bcgef fdg abgcef edbfg df eabgd | egabd dbega gfcadb dbega
+bfdag adbefc efdgcb fceab dbc cfdba egafbc dc ceda beacdfg | dbfcge cd fbcea efacb
+dgaeb cgbeadf afbeg gdbfae ebadcg gdfb acgedf fg abefc gaf | fcdgbae gf bgaed fbaedg
+cfdbeg dcfaeb cagbe cfgabde afdc fbaed cfe bfaec bgadef fc | fcaedb gbeac cfdgbe afdc
+ceg dgecfa abecfg agcdfbe gcdae gfdcab fdec gbead ce acfdg | cgfad fgebca adbfgc dagcf
+dcf cgebfa dc gdcaef eacgbdf cdefgb cebd dagfb cdgbf cfgeb | cd bgadf dbfga dgfba
+gebac caefd bf bgacedf ebfdgc dbaf cfb bfeca agcedf dbcfae | debgcf adcefb befgdc gaecfd
+abec bafgc fcebg fbaceg dcefgba degfb gec acdfeg ec fgdbca | dbgfe gdbfe ecgbf bcea
+egafbd egdbc bdc cbfdag fcde ecbdfg fgbde ebcag debgafc dc | cdbeg fabedgc fgdecba dc
+ecdgfa ag badcegf gaecb eabgfc adecbf cag acebf fbag dbceg | ebgac bfag dgacef edgacf
+afgeb adgcbe efdb fgeacbd ceagf gbdefa eb bea dacfbg dabgf | eab bgfdea abfge bdfcage
+egbdac aefdb fgdeb dabfc ea dae dbacfeg cagbdf caef eabdfc | cadbf ae dafcgb beadf
+egcadbf gbce debac dge adfebc ecgad gdcfa dgcbea gdafeb eg | dgbfae ge adcegb bdfega
+fecag dc fgecd dgcb edc fbedca dbcfeg gbedaf gfdbcae ebgfd | dce gbdc edgbfc fedcba
+cafebdg adcfge debfac dgcae gec fbdegc ge cgdab faeg ceafd | gafe bagcd edfac cbagfde
+dc bgcaf gdcebaf ecgdab cagdf efabcg dgc dcfb fgeda cgbafd | gbcfea dacebg bgfdcea dc
+afedc ebfcg dgfbac adbe eafbdcg fdbce bd fbd bdafec afcdge | baed cfgade becdf dbcfea
+bdae fbdac deafcb badcegf bcefga badfgc efcgd eb dcebf ecb | bcafdeg eagfcb dcbfag fcdbga
+gb dafbce feagd bdegf bdcgafe fdgebc acdgbf cfbde ebcg bgd | adgfcb cgeb bceg dgbcfe
+cbdfge bdceag fc edbgc dgfae bcdf fce bcefdga dgefc ebgafc | cdfge bgecaf fdgce cf
+ba fcgae gecbfd cefbd cba afdbce aecfb beda fagdcb facdbge | ebad ecagf ba deab
+ba baf ebacgf fcgad fbcdeg bgcef gadbecf ecfadb acbgf geab | cgdbfe ba dbceaf adbecf
+cdfga efd efagcb egbd ed gacedfb fbdeca decgf gbcef gfbdce | cfedg bedcfg gecbf gbfce
+fegbca ega egfdca gfeba afbec fadbg defacb gcbe eg dfagecb | ebacdf bdgeafc dfabg efabc
+fdb efcbad bdaeg fbgade gfbe egacfdb adfgc bf dcebag badfg | dfcga bfd adfcg dgbaf
+ead agbcd de bcgeda gedb agced cdafgeb bfcgda adefcb fecag | cbgead acdgb edacbf dfeabc
+cagdfe egfca geacd dg gbaecf ged agfd cebda edcbgf decafbg | gbaefc ecgaf cgbaef gcfdbe
+fd agcfedb adgfb cdaf degab bfacg cebgfa bdgfec fbd dcgbaf | abdgcef dgacbf cfda cedfgba
+cafbd fgcb bgcad gdfcba eadbf adecgb cfa efgadc agcdefb cf | fc fdbcag fgeadc fegdca
+dgcf eadcg fg dabfe gdefa efg cegabd fadecg gadfbce facbeg | aecbgd gceda gdecab abcgfe
+ebfdca agbdcf gfadc bfc afgb cdgaef egcdb gbedfac fb dgbfc | ecbfadg baefdc bf dbgec
+fabcge cafged beg abfdge aegdf dabg fgbacde bg fdebg bcfed | efgda dgefba gaefbd bagd
+gbfda afbcgd acefdg adb bd gbfae dfcga acegdb acfdegb cbdf | dbfc abd bd dcabfg
+ecgdf abcedf gfcdba eadb ecb fdcab fecbagd be eacgbf ebfdc | gdbcfa ecfdab deba efbagc
+ca fcda efbdgc ebgda bgefacd cea cdebf bdefca efagbc ebcda | fgebca egabd edcbaf acfd
+agebd dcge ed gaebc fegacb cfaebgd bcedfa gfbad dbe cdgeab | dbega fbeacd gaebcd gfcabe
+bg edfagb daecgf bgafdce bdeag cgbdaf ebgf ebdac bga edfag | dabcgf cbaed ecdba abg
+efdcg afbd bfdeg bgf fgdaecb dagceb fb gcbafe abgdef egbad | fbeagd bcdafge gdbfe fgdbe
+becfa fg dgfe dfaegcb cedfbg begdca fgceb facbdg bfg gebcd | fg gebdcf dcbega cdegb
+edgacb cb cefdba gcaefd adcbg cdb cbge efgdcab gdeca fadbg | gcabfed cb acgdbe gbafd
+cfgbde eagdbc cegdb ebcf bdf fb fbgde facedgb eafdg dcbgfa | cdfagb cfbgde bf dfegcb
+gedcfab ebfcda ecdbf gfced fcebdg gcd gdeaf cg cdbgae fgcb | cedafb gdfecb cg gc
+fbe edbfca feadbgc cbefga fb dfaeb abdge eacdf gfedac fbdc | fadeb acbedf fbdae daecf
+dgacbef efgba dgbfe fecabd bgaefd bde dfcbg de aedg bfgeca | bdfcg ebfdac eagfb gdae
+efbgcd aedgcf acd cafbd gbfdaec bagc bcfgd ca gdafcb dbfae | bcadgf beadf ca fgcadb
+edgfba fbged aed gadcb bdgae ea efga cdbefa cbefdg dcabgfe | dfbcae bfceda ae gbaed
+gdc dfgbeac adcf bfecg abgfd bcdfg dabfgc cd fbgdae dbeacg | gcbfd fdgba afgdcb gbdcae
+ca acd ecfbdg fcdeb cdfbea gcabfde afdce cbaf afedg cgadeb | cdbef ca dbecf agfed
+gfceab ed fgecd fdgaec gdbfc eacfg cdegfba dcae deabgf efd | eagdfb ed cefag aced
+baced dg deabfg dga adcge gcfd acgefd acegf acbdfge fabgce | egfdac becad aebcfgd gcdae
+ed dec cdabgf acefb ecbfdga becagd gdbac cedbgf adeg edcab | bdagc acebd bdfgac gdfbcae
+gefbca edbfc agdf bgadce fegadc ceagf gafdbce ecfgd dg gcd | gdfaec bfecagd gacefb acgbefd
+cdega fcdbga gbfceda gafbde adgcb egfcd ceba dea badecg ae | aebgdc dfbage badfge edgcf
+egcdfba ebcga gfe adgcef gdbf bedgaf gabfe dbefa fg cbdfea | gdfaec dfbg abedf gcdfae
+feabc gdfeab ebgdafc fa cebga cadgeb gafc fbgeac ebcfd fea | gcabe cbgea febadg fcag
+afdb agdfe bdcafge fdaegb aegbd gefdc abdecg aecfbg afe af | fae adfgbe af degab
+fdg cdafgb fg cdbef bgfde gfea edbag ebadgc bgaefd adfcegb | befgd dfbgca baedcg gedba
+aedgfc afegbcd ag bcedga bedafc aedbc agd gbcda baeg gfcdb | edabc gaeb afedgbc agfdce
+eafdc db fcgbe dbac dcbfaeg ecfbad bdf bfced beafgd aedcfg | cdba bd cbafed db
+cf fcebgad adfeb afdbce afgcde debgc cbdfe cafb cfd dafgeb | bdecg aegdfc cf dbcegfa
+dfceab cebgad fgcbade dae ecdgb bgae dagec fdbgce ea dcagf | eagb ceabdf dcfeab badgce
+dgf agcfed gacf afcde dgcef dgaefb efdacb egbdc fg bdeafgc | acdef afgc gdeafcb fdegab
+abc aegfcb bc aedgbcf abdce eagdc gdceaf bdfae dcbg aedgbc | fbacge cadgbe gcaedf fdeba
+ebdagf ac gcbfe agc aebgc gcbfeda cbdgfa edabg dcae acbdge | cbgfad cag dgfbca abfegd
+cdafbge bgf afgd adcebg acefb gf dbgca agdcbf gacfb cfdgeb | dagf dacgb cfabe dbgfce
+ebgfacd eafgcd dbcafg ebcafd gdeac afeg eac bcgde afgcd ea | fdbgac dfgca ceafbd gfbacd
+gfeb gcdbfea dbecg edacgf fbdac efcdb fbdgec acbedg efc fe | cedbg bcfad ef fec
+gfbecad faegb gcdfea cfg gc bceg bagfc fagdeb bacdf fcabeg | aefgcb cfg dafbge agbfdce
+bfcedg decba agcf abegfd bdceagf bgacfe cg cbgae efgab ceg | fbceag eabgfc gc abgfec
+adebcf agbef abegdc bedgf cfbadeg bedcf fgcd gd bcdfeg gdb | cbafgde dbefc gdb abefg
+aeg cdabeg cgfadb aebgd ge ecafgdb edbfa acgdb gafedc gecb | cbge agefdbc cgdafb fdabe
+febag ceba ceagf dabfge gce cabedfg cadfg efbcga ec fbdceg | edgcbf bgefa fecag afcgd
+faecdb cea dabfgc dfagceb baed dgfcae caebf ebgcf ae bdacf | ae fbaecd ebcgf bcfda
+gefc efbdga ec bdgfe fcbeda ecadgbf cbgde cedgbf bce bcgda | ce bec ecdbg gcbad
+dbaegcf dbgaf agbde dcebfa gfdc fcabg gcfbda df ceafbg dfb | becdfa dbf egafcb bfagd
+gfdae gbfec egcdf afbceg bcdf acgdbfe dabcge cfegbd dc cde | fcdgeb dbagec cafbeg gacebd
+fg edcgafb fcadb bdgae fgbda ebdfac fabcgd gecfdb gfd gafc | cefgadb fg cbfged gf
+bdfea fceba fc agbce ecdgfab gcefad fec aebdgc bcegfa cfgb | dbfae efc ecbfga gdceaf
+cdfgb gefcda abdgce beagd ec bcae dbgfeca ecg ebdgc abfedg | dgabe adgcfe fdcbg ec
+fbedc egfabd gadcf dcfeg aecdbgf gcea eg dafgec fcdagb fge | bafedgc eacg ecdfg deafgb
+faegdb fdb bgfdec bcgda agfebc gcebdaf cedf gdfcb cfbge fd | dbegacf cfaegb gfcaeb befgac
+gbacdfe fdgcba befgc fabe bcf edcbg cgfeab cfaeg fb acdfeg | cfeag bcgde ebaf fgcdab
+gef dceg edfbc baedcf bdagef eg cfegb bfacg afgbced decfbg | dfegba cfegdb eg gacfb
+cba adgcfeb abfdce dgecbf ca ebdacg becdf adfc fbeac fabge | fbaeg gfbceda fceba bdaecf
+cb adefc egcb abc bedgac ecdab bdfgca eabgcfd edagb dabfge | bfdega fagcbd abcde agdeb
+dgfbae efgbacd gcdf bdg gd bcgdfe bgcde bedac cgbefa bcgfe | gbd aedcb ecfbg ecdbg
+gcafedb ecdbfa fedcg dcefga dfgca gbcde gfae ef fec bdfcga | fdgcabe cbadef fcgda ebdgc
+eca ea fbadec debcg agef edcga caedgbf fadgc dgafec cfbgda | cbdeg cedgbaf aecdfb dcgea
+afc gbafec egbdfca ca eagbfd aecgf abfeg gcba abedfc dfgec | gafbe cedafb afbeg cagfe
+agbde eabcgd fe dcfgb efd becdgfa dfageb fdebg fdcage bfea | def edgfb acfedg bgead
+gbdec facbgd ag gba bgceda aedcbgf eagd cgabe bface fbdecg | eagbc gcbdfa bafcgde eacbf
+dbacfge cagfdb geba cefgda bgc eacgf caebfg cbdef bg fcbge | bg abcegf efgca cfdeb
+gaefc cgefdab fdcaeg aegfdb gb badfc gbf bcfag gbfeac gceb | bdafc aefgdb gfcae dfcab
+dbceg bcafgd cfabde cfabdge aed ae deacb face egfbda bfdac | cgabdf fgeadb ade dcbge
+dfbgcea fbeca cefbg dfgc bgaefd dbecga gfe fg efdgcb cdbge | gcbfed cfbeg gdfecba gecbd
+gaced bd edfcag aecdfgb bgad edcbg debfca deagbc bdc egfbc | bdc cdb efcbad dagb
+egfca bgea adebfc gfceab cfebg cdefag dgfbc bgadecf ceb eb | dcefag facgeb edbfca eacfg
+fged bcaeg fcgbde gdfacb fcadbe bfcge ebfcd fcg edabgcf gf | gfbdac efcdb gfceb fgdceb
+fgbdeac facdb agcf fc bfegcd bedfa gbcda bcdfga fcb degacb | bgecad cf dcgbfea gfca
+dafbgc cfdga dgafeb db cfdage bcfaedg fbgec bdf dcab cdbgf | cfdgb befadg ebgfc acdbfg
+eadgf gdefab ebacd fc eafgcd caf deafc egcf dacbegf bfdagc | egadcfb agfdcb debca fdcagb
+dgaecb efd gbecdf fgdcae geaf faecd dfcab bcfagde egcda ef | fe ecagd efd fed
+dbaf bf bfg ebfcga degba cedfg adfcgeb edgfb begafd daecbg | cbegda cbeadg fbg cgfde
+gdebcfa cbfad ecgfd fbeg dgfbc bg gfcade gdb gdbecf gdbeac | fdcgbe begf acgedb cbdfg
+acfdge cadgbf gecfd dbefc fg agcebfd cfg gedac adcbge efag | egaf cbdgeaf gfc bdfgca
+fbgad eabg bcdafg bde edcfab fdgec degbfca badgfe dbgfe be | egbdf bgadf bfdge edgfc
+gfceab acf ceafbd cagdbe bdaf dcfae af febacgd fgdec daebc | cegfd dacfbe faebcd adfecb
+bgefcda facgb bcg fgec cgebad gc efagcb bdgaf fecba dcfbea | bfeac acgfb ebcaf bgadf
+eagbd abcgde afedc gcbe bac debcafg bgacdf bc dbcae gadbef | cba adcfbeg efdac cb
+fbead gdebfa cabge adfbgce dcb dc aebdc dacfeb dcfa gbfecd | decfba cd dc edcgfb
+gcbae ecfbag gebcf edabg efagcd cga ac beagcdf bcfgde fbac | fgecb gdabe agc ca
+dfgacb fadbg afebdg acbgefd gdbc cgafd efgac cd beafcd fdc | daebfgc cebfad bgdeaf dcf
+cfdeab efgadc cfbag ef cagbed dbcea ecfab cfe befd gecdfab | fgecdba cabde abefc dbcae
+fadec cbgade acbfe df cdf acfdeg afdg gabcfed acged bfdcge | efcda ebfca ebgcfad dcage
+cdfgeb eabgcdf faegc facgbd gdc efbdac fdbca fdgca gd badg | dfbceg cfdba cfgda bcadf
+cdeafg ecfbgd cb eabc aegdcfb cdfba bfc cdfeba edfac dagbf | ceafdg feadc fbegdc beacdfg
+acfbde agc cabgf cfdba gfecb bgadce bcgfda fadg cebdgfa ag | cbfad cebfagd agdcbf dcabf
+dfeag fgbedca dfceg fcgaed egdcfb edbcga aefc gfadb aeg ae | gefda gabfd egacdf dfbgec
+gfbec bdcaegf cdb bdacgf dgcbae gdcaf cfdage bd badf dbfcg | gaedbc dcb fcgdb afdbgc
+cgdef geafc fd fdgbac degbc dgcefba cfeabg dfae cafdge dcf | egbcfa defa df dcf
+cafed gdbfa cbfade cfgead cb gecbfd gdbcfea bcea cfb bacfd | bcea afdbg cbegdfa afdcbge
+ac fcdgeba gdfec bdgefa fedab eac fadce aecbgf dbac aedcfb | efgabdc cafde bacefd cfeagb
+begcf eagcdbf cfg bdcfea bfeca cfdagb bfged caeg cg acfegb | bgfde dgafceb dcfeab dgacfb
+gbdfca fadbg fbc cb bdfgae abgcf feacg dfabceg dabc cfgdeb | cbf fcgdeb eafgc bdfgea
+fcaegbd abgdce fdcgab gf bfgcae bfg gbfea abgce fgce ebadf | fdabgc gcfabe aebgdfc gbdcae
+cdagbe gedbacf efbcad ebdag be gbcfad gbdac ebcg ebd egfda | efgda ecgb gbecda bdfgca
+bfdgac gdecb abcde daefc efbgcd ecdbga agbe dab ab cfgabde | ebga ab cgbfad eacdb
+efgda ac acf dfgbec dfeac edfbc ecfdgba fceabd bfdcga aecb | ecadfgb abcedf cefad cabe
diff --git a/data.9 b/data.9
new file mode 100644
index 0000000..10120f9
--- /dev/null
+++ b/data.9
@@ -0,0 +1,100 @@
+9876543234679310943456798433456798998764321357921025689921987899896498799923491297654545679876212347
+6987675036678939874567987012567897899975532467892334567890996789789989679895989398743236789865101456
+5598983124589598765689765423678956789876543568943565678999765395679876598789678987654345998764313689
+4349994235695329976789998634678946789987987679757678989398653234598767459654567998767499899875424568
+3298987656795419899896459745989134568998998789968789699219772123987654398753456899989989689986576789
+2126598787896998788902349897991013457899999997989994567909765244598875697542346789798764593987897897
+1012349898999887567893956999543234967967988656799323459898954355699876989331238996659875691298998956
+4123467999598765456789897987654347899659876545678912398767896466789987979210349965545996789399659235
+3234598985439878567896789198795456789898765434189329987546789998994699867991467894534987899985432123
+4347899876567989678965994349987897899909996521034998675323597899123989659889578943023498999875321014
+5456987997689299989254789498798998999919989992129876543213456789239877545678989432145999998989432345
+6567896798792109892123569987679999998898767889234997854324597994399765434689996565236789987698544456
+7898945689899998763012458976597989987784345678949998985434989219987654323456899854345699996597655678
+8949239796958899954124567895435678996543234567897889876599878998698765435678998765496978989498966899
+9932198965346789867258789932124567987655123458976778987988769876569876646889019887989869979329987957
+9893987896234568954345898743245798998766234567894567899875457987421987756799934999876649868912398946
+8789876789195689875457999655466799679879845678913348987654346987630298867897895988965432946794459435
+7653245678989799876767899867578954568989658799101234999869234598541349998976789876894321987895568910
+9654134789678986988979989878989243456799767895312349898998945987676556789345698765789210398996678999
+8765245696567895399898979999599012367899898986423498776566899999887687990296987984694331239989989888
+9954346897379964219787767893478943479901999597434569653465678999998798921989896593789452398978998767
+0976557898298965398656456794569894998919589439765698542324599689929899439976789432599543987767999656
+2998678999997897987642347895698769867898478929876987321015689599845996598765678953498959876656897545
+9859789899886789998756468998789655456797569999989996432326796498656789987654567894997899965545998968
+7643996798654567949898979659897643245698979989994987543689895329868999998765678949876778964234899879
+5432345697543458957999989545998732124569998967943198964599943210979098969876899129875467996446789989
+8584557987654569767899993123989841034979987654599979989679985341989197854987989039654346789677899899
+7675678998765699898988932034976432149898998863278954393989876832698986543298968998765956799898998789
+8776789439897789909977794255987543298787899985369893212399989764567997432129456789979899989949987699
+9899899524989896429865689356898655398656799876456789105679899895678987521012359891398797778932397569
+9987978939878987898754578967898786499545892998968994323456789989989498432154467910987676567891986478
+9876568998767898999743679879969897987656901239879895544678999879897599543265998934977567456789765399
+7765459876546999898654798989456998998767893446989796665678998768789987654399899949765432345996996989
+6984345995437898759995987892399999439978998669995689776889997656667998969989789899986645567895789878
+5493234989425789647889876891987899321989998778934578987999876543459549998875569789998786688934899767
+4321049875414678936979965789976678910198989989323469998967987652368932987654414579989887999023987656
+5493959954323469324767894679864567891987878993212378999545698710456891099843203458976998942125998543
+7989898965434568913456893589653456789876567992105567894434789322567992129874212367895459993349879432
+8979767996576679102378921098732345898676456789213458943226798763456789298765673456789345989659765310
+9865656889677889293467892129641237899545345698924567899012999654567899349876654597891299978978987821
+8654345679898999989679953498432356789321234567897698978929898765678998956987875698910987567899398932
+7543234578929898878989769976544578996532356878998789567998769888789987897898986789321297478921239543
+5432143456919657667899898989757689987653479989019893478987847999898796789949997996548396567890198656
+8961012367898943456789987698768789998954568998929989569876435445989654678929898987657987678954239967
+7642123456976432367893297569899898769765679456998678978987321334678965799898769598767998999876349879
+8843234568965321245892195479901989859887894367899568989765410123457896893799654329878999899987456989
+9754545678976432496789989567899876543998999578965467999876923245569987932679954212989898789998567894
+9898758789876545789897678998967989862369998679754345699989874356998898921569896102398767678999978943
+9998767894988656896935569549459898973456899789643234987998765459876789932499789213988654589989899432
+8789978943299767965423478921298767895569964996532146986799878598765999893987689929876542679878798921
+9689989652129878987314567890989856789678953987844299875989989679754666789986567898986321299767687899
+6567897541012989796205679999976545679999654598765987654678998798673245678965438957895410987954576778
+4489995432123497654317895798765432459898767679876798763567899899542134589875312346689929996543134567
+3235789543235698785456954349876721248789878789989899874698999998753234696543201234567898987654235678
+2124678965346789896787893212987210187678989892198942976789998769876545987654415345698976798966547899
+1014589878456893987899954301297321234589899999977893988894987456998668998765623466989765429987858943
+2123578989569902398978975212976542475789789998756789199953986568989889679876734569879954312398969652
+3234567897698943469869865323987643567898699999547894349992197689679995566987655698767893202459878943
+4345978998997899598756998764598764678987569898769976998989999796598754324499878999859994312378989965
+5656899569866968965431279879689985789998498769878989876865778965469843212347989898948975459459999876
+6787932499754357896542456998789699899886329856989999765954567894345954353456798797837988678969878997
+7898953987643239919757567899897543998765498745899886644212678901234969754668997655126898789998868998
+8999654996544128929898978934998631349877899635789765432103789212349898975678986543235679892987657899
+9998969875431017999939989325698752356989998523489876643214897423598787896999697655356799921098545989
+9997978996652126789129893216799763467899896412678999765625996545987676569896598766587898943985432877
+9886899429863245679399789109999878978998765324569769889436789679876543456789439898698987899874321466
+8765678910964376899987698998784989989549995445678945996547899798965432387696429999789556789766440355
+7654569899875487999896587899543494399929987678799434987667934977994321234597998998995445678954321234
+6543456789989568998785476998932359239898998989893223699788999866789410165789896987654324479765535445
+5432567899987678997665365767899498998767999699932104567999987654789421256899765698985212356986787568
+4321256789999789886543214456798997987656789569543213469765498765678933345998754109876323567897898679
+5434345678998998765432102349987856798545993498994999578954329878989654658987653212987434878998929989
+6565656799567899876545214498986534987656789597789878989865912989498768767899864324598546789989939999
+7676768923456999987756725987995423898967896986678767993999894994239989878998975435987659896765798989
+8787879734567898998998999876789545789989954965483458912987789892129796989787896745898789975454447678
+9898989656789987889999987494899656789195899754312379909876556789097645692546999856789897654322334589
+8969398797996545978899976323678967991024789876106567899985434567998732101235678969897998854310123459
+7654249899975323456789985214567898942195678998217879999876524567986544212346989989976799965924265678
+8652135987976896568999953107998929769989899999356989998765213456987656434587896492455678999895696799
+9543299876989987689659864315789319898878989876467999989874301345699786547998954321234589987689989892
+7654987664698998796549874323498901997659878987578997779765432456789987856899967432355678996578678921
+9965799543567899987856975434567892987543656898989986569876753697897598767977898645698789975457568910
+9899898632356792198977896565678969876532345689995987432987884789966449878956789876899899764325457891
+6678997653458999299989979876799349865431334678953294321098765789654323989345999988967998955212345789
+4599298964578998988998968987891234986210123689964498753129877897654312993234789999654987742101234699
+3989129765679997667987899998910129876433234589876569876534988998973209894365678919869876543232348789
+2878939876799896543566999879321236997645345679987893997699999529994698765489799201978997654343469892
+3467899987986789432355698765432345698987456789298932398988965410989989876569895412399989765499598921
+5679979999895678921234569989543456789998987891019643599877896329879879999678976523989878979988987932
+6789568987784569990146678998656567899969898989998754988756899499764768998789897949876767989877656893
+9893499976543478989236789239767898998756789878899869876645798987653456799898789498765456799765346789
+6912987665421299879345678949879989976545698765789979865434687898432567895965689398754345678974235699
+5439876543210987769967899999989567895431987543695491984323456989943458954397899999665265667895127678
+6545997654521976458899910989996468986532398654599392395664677979894568965989959876543123456789024568
+7666798766439894346778929878987347897747498765678989987775899866789789999878943997651016567892123456
+8789899876598789234567898969876456798856569876789778998986798754989899989766959898764323456789236768
+9898999987697655139879987655987898949987899987894566989987986543478999876745898759877467897897345679
+8967998799798743016791098943498929956798999898913455678999876542359998765636789542976578949985498789
+7649876549899752145892987632349547897899498769101234589212987656767899443323498931987989539876569893
+8432987632999863236789876545678956789902349854213455678903498987898954321014567890198994321987689912
diff --git a/data.9a b/data.9a
new file mode 100644
index 0000000..6dee4a4
--- /dev/null
+++ b/data.9a
@@ -0,0 +1,5 @@
+2199943210
+3987894921
+9856789892
+8767896789
+9899965678
-- 
cgit v1.2.3