commit 51ce80223a14f9e928abc2280f81dbd326208683 (patch)
parent d7d8534a79c2ebc76fdeb16cc12c60b89900eda4
Author: Alex Karle <alex@alexkarle.com>
Date: Sat, 3 Dec 2022 12:54:33 -0500
Add 2020 solutions
These were tracked in a different non-public repo. Might as well
consolidate them and own up to the fact I wrote a good bit of Perl :)
Diffstat:
| A | 2020/01/input | | | 200 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | 2020/01/sol1.pl | | | 18 | ++++++++++++++++++ |
| A | 2020/01/sol2.pl | | | 31 | +++++++++++++++++++++++++++++++ |
| A | 2020/02/input | | | 1000 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | 2020/02/sol1.pl | | | 15 | +++++++++++++++ |
| A | 2020/02/sol2.pl | | | 13 | +++++++++++++ |
| A | 2020/03/input | | | 323 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | 2020/03/sol1.pl | | | 16 | ++++++++++++++++ |
| A | 2020/03/sol2.pl | | | 40 | ++++++++++++++++++++++++++++++++++++++++ |
| A | 2020/04/input | | | 989 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | 2020/04/sol1.pl | | | 26 | ++++++++++++++++++++++++++ |
| A | 2020/04/sol2.pl | | | 62 | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | 2020/05/input | | | 965 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | 2020/05/sol1.pl | | | 42 | ++++++++++++++++++++++++++++++++++++++++++ |
| A | 2020/05/sol2.pl | | | 50 | ++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | 2020/06/input | | | 2232 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | 2020/06/sol1.pl | | | 23 | +++++++++++++++++++++++ |
| A | 2020/06/sol2.pl | | | 25 | +++++++++++++++++++++++++ |
| A | 2020/07/input | | | 594 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | 2020/07/sol1.pl | | | 43 | +++++++++++++++++++++++++++++++++++++++++++ |
| A | 2020/07/sol2.pl | | | 41 | +++++++++++++++++++++++++++++++++++++++++ |
| A | 2020/08/input | | | 625 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | 2020/08/sol1.pl | | | 33 | +++++++++++++++++++++++++++++++++ |
| A | 2020/08/sol2.pl | | | 52 | ++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | 2020/09/input | | | 1000 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | 2020/09/sol1.pl | | | 40 | ++++++++++++++++++++++++++++++++++++++++ |
| A | 2020/09/sol2.pl | | | 46 | ++++++++++++++++++++++++++++++++++++++++++++++ |
| A | 2020/10/input | | | 100 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | 2020/10/sol1.pl | | | 27 | +++++++++++++++++++++++++++ |
| A | 2020/10/sol2.pl | | | 36 | ++++++++++++++++++++++++++++++++++++ |
| A | 2020/11/input | | | 99 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | 2020/11/sol1.pl | | | 71 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | 2020/11/sol2.pl | | | 99 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| M | README.md | | | 4 | ++++ |
34 files changed, 8980 insertions(+), 0 deletions(-)
diff --git a/2020/01/input b/2020/01/input
@@ -0,0 +1,200 @@
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diff --git a/2020/01/sol1.pl b/2020/01/sol1.pl
@@ -0,0 +1,18 @@
+#!/usr/bin/env perl
+# idea:
+# HAS to be O(N) because have to check each item in worst case
+use strict;
+use warnings;
+
+my %seen;
+while (<>) {
+ chomp;
+ my $comp = 2020 - $_;
+ if (exists $seen{$comp}) {
+ print $_ * $comp . "\n";
+ exit(0);
+ } else {
+ $seen{$_} = 1;
+ }
+}
+exit(1);
diff --git a/2020/01/sol2.pl b/2020/01/sol2.pl
@@ -0,0 +1,31 @@
+#!/usr/bin/env perl
+# idea:
+# HAS to be O(N) because have to check each item in worst case
+use strict;
+use warnings;
+
+# first read the whole file in
+my @all;
+
+open(my $fh, '<', 'input') or die "$!";
+for (<$fh>) {
+ chomp;
+ push @all, $_;
+}
+
+for (my $i = 0; $i < scalar @all; $i++) {
+ my $cand = shift @all;
+ my $magic = 2020 - $cand;
+ my %seen;
+ for (@all) {
+ my $targ = $magic - $_;
+ if (exists $seen{$targ}) {
+ print $targ * $_ * $cand . "\n";
+ exit(0);
+ } else {
+ $seen{$_} = 1;
+ }
+ }
+ push @all, $cand;
+}
+exit(1);
diff --git a/2020/02/input b/2020/02/input
@@ -0,0 +1,1000 @@
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diff --git a/2020/02/sol1.pl b/2020/02/sol1.pl
@@ -0,0 +1,15 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+open(my $fh, '<', 'input') or die "$!";
+my $n;
+for my $line (<$fh>) {
+ chomp $line;
+ my ($min, $max, $goal, $pass) = $line =~ m{^(\d+)-(\d+) ([a-z]): ([a-z]+)};
+ my $count = () = $pass =~ /$goal/g;
+ if ($count <= $max && $count >= $min) {
+ $n++;
+ }
+}
+print "$n\n";
diff --git a/2020/02/sol2.pl b/2020/02/sol2.pl
@@ -0,0 +1,13 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+open(my $fh, '<', 'input') or die "$!";
+my $n;
+for my $line (<$fh>) {
+ my ($A, $B, $goal, $pass) = $line =~ m{^(\d+)-(\d+) ([a-z]): ([a-z]+)};
+ if ((substr($pass, $A-1, 1) eq $goal) xor (substr($pass, $B-1, 1) eq $goal)) {
+ $n++;
+ }
+}
+print "$n\n";
diff --git a/2020/03/input b/2020/03/input
@@ -0,0 +1,323 @@
+.#.#....###..#.#..............#
+#......#####..##.##.#.......#.#
+.###.....#..#.#..#..#.#......#.
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diff --git a/2020/03/sol1.pl b/2020/03/sol1.pl
@@ -0,0 +1,16 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+open (my $fh, '<', 'input') or die "$!";
+
+my $n;
+my $i = 0;
+for my $l (<$fh>) {
+ chomp $l;
+ if (substr($l, (3 * $i) % length($l), 1) eq '#') {
+ $n++;
+ }
+ $i++;
+}
+print "$n\n";
diff --git a/2020/03/sol2.pl b/2020/03/sol2.pl
@@ -0,0 +1,40 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+
+# Read it all in
+open (my $fh, '<', 'input') or die "$!";
+my $i = 0;
+my @M = ();
+for my $l (<$fh>) {
+ chomp $l;
+ $M[$i] = [split('', $l)];
+ $i++;
+}
+
+# Do work on the matrix
+my @slopes = (
+ [1,1],
+ [3,1],
+ [5,1],
+ [7,1],
+ [1,2],
+);
+
+my @N;
+for (my $k = 0; $k < scalar @slopes; $k++) {
+ my ($r, $d) = @{$slopes[$k]};
+ my $j = 0;
+ for (my $i = 0; $i < scalar @M; $i += $d) {
+ if ($M[$i]->[$j] eq '#') {
+ $N[$k]++;
+ }
+ $j = ($j + $r) % scalar @{$M[0]};
+ }
+}
+
+print join(",", @N) . "\n";
+my $total = 1;
+$total *= $_ for @N;
+print "$total\n";
diff --git a/2020/04/input b/2020/04/input
@@ -0,0 +1,989 @@
+hgt:176cm
+iyr:2013
+hcl:#fffffd ecl:amb
+byr:2000
+eyr:2034
+cid:89 pid:934693255
+
+hcl:#b5c3db ecl:grn hgt:155cm pid:#baec97 iyr:2017
+byr:1939
+eyr:2020
+
+pid:526669252 eyr:1972
+hgt:152cm ecl:dne byr:1960 hcl:z iyr:2023
+
+eyr:2028 hcl:#c0946f hgt:73in byr:1926 ecl:#473aaf iyr:2016 pid:565318180
+
+pid:472686027 ecl:oth iyr:2019
+cid:277 byr:1940
+eyr:2030 hgt:170cm
+hcl:#62e117
+
+ecl:oth
+iyr:2017
+pid:938461813 hcl:#733820 byr:1959 hgt:159cm eyr:2022
+
+iyr:2011 eyr:2021 hcl:z
+ecl:hzl byr:2002 pid:17324328 cid:140
+hgt:186cm
+
+byr:2022 pid:3164234967 iyr:1984
+hgt:76cm hcl:6b3837
+ecl:#fa362b
+eyr:2037
+
+hcl:z eyr:1945
+pid:9247286687 hgt:75cm
+iyr:1934 cid:326 ecl:zzz
+byr:2005
+
+byr:2005
+ecl:lzr
+eyr:2021 pid:152cm
+cid:254 iyr:2020 hcl:z hgt:157cm
+
+iyr:2020 eyr:2020 hcl:#18171d ecl:gry pid:914128753 hgt:168cm
+byr:2002
+
+hcl:#7d3b0c hgt:160cm eyr:2020 iyr:2015
+pid:054067854 ecl:brn byr:2023
+
+hcl:#cfa07d hgt:157cm
+byr:1994 eyr:2027 pid:344443856
+iyr:2016
+
+pid:762423097
+iyr:2014 hcl:#a97842 ecl:brn hgt:180cm byr:1927 eyr:2021
+
+pid:6645616064 hcl:#ceb3a1 byr:2030
+eyr:2032 hgt:158cm iyr:2012
+ecl:#e9619e
+
+eyr:2022
+ecl:brn
+byr:1986
+hgt:161cm cid:99 pid:288726584 hcl:#6b5442 iyr:2019
+
+cid:75
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+hgt:66in byr:1953
+
+hcl:#623a2f byr:1978
+iyr:2013
+hgt:180cm eyr:2027 ecl:amb pid:836425641
+
+pid:557464096 hgt:155cm ecl:blu cid:142 byr:1936 iyr:2010
+hcl:#cfa07d eyr:2027
+
+ecl:gry iyr:2024 hcl:#341e13 pid:442593279 cid:314 hgt:186cm byr:1960
+eyr:2022
+
+cid:123 iyr:2014
+byr:2000
+pid:878733390 eyr:2021 ecl:hzl hgt:162cm
+
+byr:1959 cid:259
+pid:722895016
+ecl:brn iyr:2018 eyr:2027 hgt:185cm
+
+pid:163697814 ecl:hzl
+iyr:2013 byr:1932
+hgt:68in cid:286 eyr:2025 hcl:#efcc98
+
+byr:1927
+hgt:72cm ecl:oth
+eyr:2021 hcl:#99e959
+pid:669724466 iyr:2010
+
+byr:1943 iyr:2011 eyr:2024 pid:384419879 ecl:hzl hcl:#7d3b0c hgt:170cm
+
+pid:137944386 ecl:gry
+byr:1953 hcl:#733820 iyr:2013 eyr:2025 hgt:184cm
+
+iyr:2017 eyr:2023 pid:288078785
+hgt:179cm
+byr:1993 hcl:#602927 ecl:hzl
+
+ecl:brn
+hgt:187cm eyr:2024 byr:1971 iyr:2020 hcl:#b6652a pid:622975646
+cid:290
+
+pid:371817422 ecl:blu byr:1964
+iyr:2018
+eyr:2021 cid:176
+hgt:153cm hcl:#888785
+
+byr:2002
+cid:256 iyr:2014 eyr:2024 ecl:blu hcl:#18171d hgt:187cm
+pid:050022911
+
+hgt:178cm pid:211144001 eyr:2027 iyr:2013
+byr:1947
+hcl:#7d3b0c ecl:grn
+
+eyr:2025 ecl:blu pid:046417901 byr:1950
+iyr:2015 hgt:165cm
+hcl:#7d3b0c cid:128
+
+ecl:hzl eyr:2029
+iyr:2015
+hgt:171cm hcl:#341e13
+pid:561680375 byr:1997
+
+byr:1948 iyr:2023 pid:17288381 hcl:6a34a3 ecl:#671ece eyr:2001
+cid:152
+
+eyr:2036 hgt:141 iyr:1957 byr:1987 hcl:z
+pid:86986187 ecl:utc
+
+eyr:2024 hcl:#b6652a iyr:2017 ecl:blu byr:1988 cid:348 hgt:152cm pid:068684272
+
+iyr:2011 pid:989825275
+cid:78 hcl:#341e13 byr:1983 ecl:blu hgt:158cm eyr:2020
+
+ecl:grn hgt:187cm eyr:2027 iyr:2015
+hcl:#866857 pid:240650427
+byr:1940
+cid:91
+
+hcl:#888785 cid:185 byr:1925
+hgt:155cm iyr:2015 ecl:blu eyr:2027 pid:851697441
+
+iyr:2016 ecl:oth pid:056439470 byr:1985 eyr:2026
+hgt:154cm hcl:#282539
+
+ecl:hzl hcl:#a97842
+iyr:1944
+pid:118846711 eyr:2026 byr:1922 hgt:185cm
+
+iyr:2020 hcl:#733820
+pid:854531642 hgt:165cm
+ecl:hzl eyr:2022
+
+iyr:2014
+byr:1957 hcl:#7fa674 hgt:189cm
+eyr:2023 pid:740871941 ecl:brn
+
+ecl:amb cid:349 hgt:170cm
+byr:1952 hcl:#ceb3a1 iyr:2020
+eyr:2026
+pid:730499325
+
+eyr:2027 ecl:amb
+byr:1975 pid:985687961
+hcl:z hgt:157cm
+iyr:2013
+cid:133
+
+ecl:blu
+hgt:193cm iyr:2015 hcl:#10f2ba byr:1989 pid:939704495 eyr:2021
+
+ecl:oth eyr:2025 hgt:69in iyr:2014 cid:258 pid:477970733 byr:1984 hcl:#b6652a
+
+hcl:z byr:2013
+ecl:zzz
+pid:1904741884 hgt:180 cid:138 eyr:1985 iyr:1935
+
+eyr:2025
+iyr:2026 hgt:190in pid:#43ca33
+ecl:#3e1ef1 hcl:#7d3b0c byr:2030
+
+eyr:2029 hgt:191cm
+byr:1986 hcl:#ceb3a1 cid:327 pid:795060714 iyr:2012 ecl:hzl
+
+eyr:2025 iyr:2017 ecl:grn
+hcl:z
+pid:8886398 hgt:174cm byr:2016
+
+hcl:#a97842
+eyr:2021 ecl:grn iyr:2013 pid:565234133 byr:1998
+hgt:161cm
+
+eyr:2029 hgt:163cm byr:1933 cid:86 iyr:2011
+ecl:grn
+hcl:#fffffd
+pid:818769307
+
+hgt:190cm eyr:2030 hcl:#af5b5d iyr:2011 ecl:brn pid:359524299 byr:1969
+
+ecl:amb iyr:2011 eyr:2022
+cid:141
+byr:1978 hgt:69in hcl:#fffffd pid:013006109
+
+ecl:blu hgt:164cm iyr:2019 eyr:2027 pid:899103430 hcl:#cfa07d
+byr:1976
+
+eyr:1938
+ecl:#a03c41 pid:708735698
+iyr:2030
+hgt:184cm hcl:#b6652a byr:2013
+
+ecl:hzl byr:1997 hcl:#a97842 cid:60 pid:172cm
+eyr:2023 hgt:161in iyr:1936
+
+ecl:hzl
+byr:1938 pid:094889181
+hgt:162cm iyr:2020
+eyr:2028
+hcl:#623a2f
+
+hgt:162cm cid:86
+hcl:#623a2f pid:738174580 ecl:brn byr:1980 eyr:2028 iyr:2014
+
+byr:2007 hgt:150in hcl:z
+eyr:2032
+ecl:#114f3b
+iyr:2030 pid:5129772
+
+ecl:hzl iyr:2017
+hcl:#18171d
+pid:696283412 byr:1976 hgt:168cm
+eyr:2028
+
+eyr:1922 ecl:#84b0d4 byr:2013 hcl:#ceb3a1 pid:150cm iyr:2030
+hgt:71cm
+
+hgt:164cm byr:1949 ecl:gry eyr:2026
+hcl:#623a2f
+
+ecl:oth
+iyr:2013 hgt:166cm hcl:#50e385
+pid:478852286
+eyr:2030 byr:1930
+
+cid:129
+iyr:2020 byr:1978 pid:907580992 eyr:1955
+hcl:#602927
+ecl:grn hgt:165cm
+
+ecl:blu iyr:2018 byr:1953
+hgt:177cm pid:126681706 eyr:2025 hcl:#c0946f
+
+byr:1984 pid:275799917
+ecl:oth hcl:#623a2f cid:348 iyr:2020
+hgt:189cm eyr:2024
+
+iyr:2016
+ecl:hzl byr:1954
+hcl:#623a2f pid:810508839 eyr:2026
+hgt:185cm
+
+byr:1967
+eyr:2021 hcl:#ceb3a1
+pid:406634908 hgt:158cm iyr:2018 ecl:hzl
+
+iyr:2019 eyr:2030 pid:995681076 hcl:#341e13
+cid:101 hgt:162cm ecl:blu byr:1925
+
+eyr:2026 pid:272513479 hcl:#b6652a byr:1973 iyr:2016 ecl:amb hgt:182cm
+
+pid:298704871 eyr:2024 hcl:#efcc98 byr:1959
+iyr:2014 hgt:191cm ecl:grn
+
+hgt:193cm pid:750729809 ecl:oth
+cid:324
+iyr:2011 hcl:#efcc98 byr:1954 eyr:2020
+
+byr:1966 iyr:2019 eyr:2025 ecl:#2df4b6
+hgt:184cm pid:#fc17f4 cid:161 hcl:#602927
+
+byr:1955 hcl:299464 ecl:amb
+hgt:157cm iyr:2017 eyr:2021
+pid:239450987
+
+hgt:172cm
+ecl:hzl
+pid:839804598
+hcl:#341e13 eyr:2030 byr:1964 iyr:2013
+
+iyr:2018 hgt:152cm byr:1948 hcl:#623a2f pid:400121515
+ecl:blu
+eyr:2020
+
+cid:296
+ecl:grn
+byr:1960 iyr:2028 pid:#1f4b95 eyr:2033 hcl:#602927
+hgt:66cm
+
+iyr:1933 ecl:#232e20 pid:#d03ca7
+eyr:2030 hcl:598ed6 hgt:154in byr:2011
+
+cid:247 ecl:grn iyr:2014
+hgt:178cm
+byr:1992 hcl:#602927 eyr:2021
+pid:678964478
+
+iyr:2010 pid:623705680
+ecl:hzl hgt:181cm byr:1980 hcl:#341e13 eyr:2028
diff --git a/2020/04/sol1.pl b/2020/04/sol1.pl
@@ -0,0 +1,26 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+open(my $fh, '<', 'input') or die "$!";
+# slurp
+my $content;
+{
+ local $/;
+ $content = <$fh>;
+}
+
+my @recs = split("\n\n", $content);
+my $n;
+my @required = qw(byr iyr eyr hgt hcl ecl pid);
+REC:
+for my $r (@recs) {
+
+ my @fields = split(/\s+/, $r);
+ my %has = map { $_ => 1 } map { $_ =~ s/:.*//r } @fields;
+ for my $req (@required) {
+ next REC if !exists $has{$req};
+ }
+ $n++;
+}
+print "$n\n";
diff --git a/2020/04/sol2.pl b/2020/04/sol2.pl
@@ -0,0 +1,62 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+open(my $fh, '<', 'input') or die "$!";
+# slurp
+my $content;
+{
+ local $/;
+ $content = <$fh>;
+}
+
+my @recs = split("\n\n", $content);
+my $n = 0;
+my %required = (
+ byr => sub { $_[0] =~ /^\d\d\d\d$/ && $_[0] >= 1920 && $_[0] <= 2002 },
+ iyr => sub { $_[0] =~ /^\d\d\d\d$/ && $_[0] >= 2010 && $_[0] <= 2020 },
+ eyr => sub { $_[0] =~ /^\d\d\d\d$/ && $_[0] >= 2020 && $_[0] <= 2030 },
+ hgt => sub {
+ my $v = $_[0];
+ if ($v =~ /^(\d\d+)(cm|in)$/) {
+ if ($2 eq 'cm') {
+ return ($1 >= 150 && $1 <= 193);
+ } else {
+ return ($1 >= 59 && $1 <= 76);
+ }
+ } else {
+ return 0;
+ }
+ },
+ hcl => sub { $_[0] =~ /^#[0-9a-f]{6}$/ },
+ ecl => sub { $_[0] =~ /^(amb|blu|brn|gry|grn|hzl|oth)$/ },
+ pid => sub { $_[0] =~ /^\d{9}$/ },
+);
+REC:
+for my $r (@recs) {
+ my @fields = split(/\s+/, $r);
+
+ # parse the fields, validate as you go
+ my %has;
+ for my $f (@fields) {
+ my ($k, $v) = split(':', $f);
+ $has{$k} = $v;
+ if (!exists $required{$k}) {
+ next if $k eq 'cid'; #ok
+
+ print "unknown key: $k\n";
+ next REC;
+ }
+ if (!$required{$k}->($v)) {
+ # print "bad key/val: $k:$v\n";
+ next REC;
+ }
+ }
+
+ # check they all exist
+ for my $req (keys %required) {
+ next REC if !exists $has{$req};
+ }
+ $n++;
+}
+print "$n\n";
diff --git a/2020/05/input b/2020/05/input
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diff --git a/2020/05/sol1.pl b/2020/05/sol1.pl
@@ -0,0 +1,42 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+open (my $fh, '<', 'input') or die "$!";
+
+my @items;
+{
+ local $/;
+ my $content = <$fh>;
+ @items = split("\n", $content);
+}
+
+# HACK: don't have to compute ID for all of them--sort then compute ID
+#
+# BUT: we'll brute force it...
+my @ids = map { id($_) } @items;
+@ids = sort { $b <=> $a } @ids;
+print $ids[0] . "\n";
+
+
+sub id {
+ my ($v) = @_;
+ my $id;
+ # row
+ for (my $i = 0; $i < 7; $i++) {
+ if (substr($v, $i, 1) eq 'B') {
+ $id += (2 ** (6 - $i)) * 8;
+ } else {
+ # F -- lower bound stays same, no addition
+ }
+ }
+ # col
+ for (my $i = 7; $i < 10; $i++) {
+ if (substr($v, $i, 1) eq 'R') {
+ $id += 2 ** (9 - $i);
+ } else {
+ # R
+ }
+ }
+ return $id;
+}
diff --git a/2020/05/sol2.pl b/2020/05/sol2.pl
@@ -0,0 +1,50 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+open (my $fh, '<', 'input') or die "$!";
+
+my @items;
+{
+ local $/;
+ my $content = <$fh>;
+ @items = split("\n", $content);
+}
+
+# HACK: don't have to compute ID for all of them--sort then compute ID
+#
+# BUT: we'll brute force it...
+my @ids = map { id($_) } @items;
+@ids = sort { $b <=> $a } @ids;
+
+# NOTE: not first or last
+for (my $i = 1; $i < $#ids; $i++ ) {
+ if ($ids[$i-1] - $ids[$i] > 1) {
+ print $ids[$i] + 1 . "\n"; # 2 seat gap, print middle
+ exit(0);
+ }
+}
+exit(1);
+
+
+sub id {
+ my ($v) = @_;
+ my $id;
+ # row
+ for (my $i = 0; $i < 7; $i++) {
+ if (substr($v, $i, 1) eq 'B') {
+ $id += (2 ** (6 - $i)) * 8;
+ } else {
+ # F -- lower bound stays same, no addition
+ }
+ }
+ # col
+ for (my $i = 7; $i < 10; $i++) {
+ if (substr($v, $i, 1) eq 'R') {
+ $id += 2 ** (9 - $i);
+ } else {
+ # R
+ }
+ }
+ return $id;
+}
diff --git a/2020/06/input b/2020/06/input
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diff --git a/2020/06/sol1.pl b/2020/06/sol1.pl
@@ -0,0 +1,23 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+my @groups;
+open(my $fh, '<', 'input') or die "$!";
+{
+ local $/;
+ my $content = <$fh>;
+ @groups = split("\n\n", $content);
+}
+
+# reduce each group to a bag o words, then uniq, count
+my $n;
+for my $g (@groups) {
+ my %yes;
+ for my $m (split("\n", $g)) {
+ chomp($m);
+ $yes{$_} = 1 for split('', $m);
+ }
+ $n += keys %yes;
+}
+print "$n\n";
diff --git a/2020/06/sol2.pl b/2020/06/sol2.pl
@@ -0,0 +1,25 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+my @groups;
+open(my $fh, '<', 'input') or die "$!";
+{
+ local $/;
+ my $content = <$fh>;
+ @groups = split("\n\n", $content);
+}
+
+# reduce each group to a bag o words, then uniq, count
+my $n;
+for my $g (@groups) {
+ my %yes;
+ my @members = split("\n", $g);
+ my $goal = scalar @members;
+ for my $m (@members) {
+ chomp($m);
+ $yes{$_} += 1 for split('', $m);
+ }
+ $n += scalar grep { $yes{$_} == $goal } keys %yes;
+}
+print "$n\n";
diff --git a/2020/07/input b/2020/07/input
@@ -0,0 +1,594 @@
+faded yellow bags contain 4 mirrored fuchsia bags, 4 dotted indigo bags, 3 faded orange bags, 5 plaid crimson bags.
+striped olive bags contain 4 dark crimson bags.
+dotted indigo bags contain 4 faded black bags, 4 clear cyan bags, 5 vibrant teal bags.
+plaid crimson bags contain 3 shiny gold bags, 3 plaid gray bags.
+muted fuchsia bags contain 3 shiny bronze bags.
+plaid gray bags contain no other bags.
+dull maroon bags contain 2 posh maroon bags, 3 wavy aqua bags, 2 faded white bags, 5 posh bronze bags.
+dull red bags contain 3 striped silver bags, 2 dark tan bags.
+muted lavender bags contain 3 striped red bags.
+shiny lime bags contain 1 dotted olive bag.
+dim violet bags contain 5 faded orange bags, 4 plaid green bags, 1 faded black bag.
+wavy indigo bags contain 4 bright aqua bags, 2 dotted orange bags, 2 vibrant yellow bags.
+vibrant purple bags contain 3 plaid indigo bags, 3 dark gold bags, 3 striped yellow bags, 3 light tomato bags.
+plaid plum bags contain 1 faded silver bag.
+striped teal bags contain 2 shiny crimson bags, 1 dull gray bag, 3 vibrant teal bags.
+posh crimson bags contain 2 light violet bags.
+pale maroon bags contain 2 wavy maroon bags, 1 dotted white bag.
+drab cyan bags contain 4 dim violet bags, 5 pale tan bags, 3 faded black bags.
+bright black bags contain 2 faded magenta bags.
+dotted green bags contain 3 muted cyan bags.
+striped chartreuse bags contain 5 posh silver bags, 5 wavy violet bags.
+drab olive bags contain 5 dull blue bags.
+drab green bags contain 2 vibrant violet bags, 2 dim violet bags, 2 light brown bags.
+dark violet bags contain 5 drab brown bags, 4 dim chartreuse bags, 4 dark salmon bags.
+faded orange bags contain 4 dull lavender bags.
+dark fuchsia bags contain 2 clear tomato bags.
+plaid gold bags contain 3 clear tomato bags.
+muted red bags contain 1 muted green bag.
+dark coral bags contain 5 muted white bags, 3 mirrored indigo bags, 1 shiny blue bag, 2 drab green bags.
+dark chartreuse bags contain 2 bright teal bags.
+dim silver bags contain 4 shiny white bags, 2 vibrant plum bags, 3 clear plum bags.
+clear silver bags contain 1 dull gray bag.
+pale gray bags contain no other bags.
+plaid chartreuse bags contain 3 dull brown bags.
+dotted crimson bags contain 3 pale olive bags, 2 pale black bags.
+dark blue bags contain 1 light red bag, 5 striped turquoise bags.
+dim white bags contain 5 bright white bags, 4 light magenta bags, 4 wavy chartreuse bags.
+striped magenta bags contain 3 dull coral bags.
+drab bronze bags contain 4 bright red bags.
+light gray bags contain 1 mirrored coral bag.
+wavy brown bags contain 4 clear lime bags, 1 plaid lavender bag, 1 faded lavender bag.
+bright violet bags contain 5 clear indigo bags, 1 plaid indigo bag, 3 light beige bags.
+drab tan bags contain 4 drab chartreuse bags.
+shiny teal bags contain 1 bright tan bag.
+dark silver bags contain 1 drab orange bag, 1 striped plum bag, 2 bright gold bags.
+wavy turquoise bags contain 3 striped gray bags, 1 dotted lime bag, 4 pale plum bags, 2 vibrant orange bags.
+wavy red bags contain 1 dim gold bag, 1 striped turquoise bag, 1 bright red bag.
+mirrored yellow bags contain 5 faded cyan bags, 2 wavy green bags.
+wavy blue bags contain 5 dark violet bags, 4 vibrant gray bags.
+mirrored olive bags contain 5 faded orange bags, 2 posh aqua bags, 3 dotted silver bags, 2 striped plum bags.
+faded crimson bags contain 3 striped maroon bags, 4 pale tomato bags.
+vibrant olive bags contain 2 wavy yellow bags, 2 mirrored orange bags.
+vibrant fuchsia bags contain 4 dim yellow bags, 3 drab tan bags.
+dotted tan bags contain 2 faded fuchsia bags, 2 pale turquoise bags, 4 mirrored gray bags.
+mirrored beige bags contain 1 mirrored olive bag.
+faded turquoise bags contain 5 dull yellow bags, 5 clear gray bags, 5 muted lavender bags.
+wavy violet bags contain 5 dotted gold bags, 5 dull cyan bags.
+light tan bags contain 1 dull salmon bag, 1 dull bronze bag, 1 dull tan bag.
+wavy tan bags contain 4 drab black bags.
+muted silver bags contain 1 dark lavender bag, 5 pale tan bags, 2 clear violet bags, 3 drab coral bags.
+dull blue bags contain 5 muted olive bags, 2 drab salmon bags, 3 clear red bags.
+bright chartreuse bags contain 5 dim teal bags.
+posh bronze bags contain 3 plaid black bags, 1 clear lavender bag, 3 dim chartreuse bags, 1 plaid gray bag.
+striped orange bags contain 5 dull turquoise bags, 2 dotted olive bags, 5 bright coral bags, 1 mirrored aqua bag.
+posh white bags contain 4 dim tomato bags, 5 light salmon bags.
+faded cyan bags contain 2 plaid crimson bags, 5 muted green bags, 4 bright olive bags.
+dark red bags contain 2 bright blue bags, 5 faded turquoise bags, 5 bright black bags.
+pale magenta bags contain 4 drab chartreuse bags, 2 light tomato bags, 5 dull lavender bags.
+posh orange bags contain 3 muted gray bags.
+clear tan bags contain 2 dim crimson bags, 3 light olive bags.
+dark green bags contain 4 muted maroon bags, 5 striped gold bags, 2 drab indigo bags, 2 dotted silver bags.
+dim blue bags contain 5 wavy coral bags, 4 shiny chartreuse bags, 5 bright teal bags, 2 drab beige bags.
+dim indigo bags contain 2 dull cyan bags, 3 dark maroon bags.
+dotted gold bags contain 4 drab tomato bags, 1 light cyan bag, 2 pale tan bags, 2 light tomato bags.
+faded gold bags contain 2 drab tan bags, 5 mirrored chartreuse bags, 2 striped gold bags, 3 bright silver bags.
+muted olive bags contain 2 plaid black bags, 3 shiny gold bags, 4 vibrant crimson bags.
+shiny gray bags contain 4 clear violet bags.
+dim teal bags contain no other bags.
+drab fuchsia bags contain 4 dim purple bags, 4 striped beige bags.
+dark cyan bags contain 3 drab salmon bags.
+clear lavender bags contain 2 dim olive bags, 4 mirrored gold bags, 4 striped plum bags.
+posh lime bags contain 4 mirrored teal bags, 3 wavy chartreuse bags, 2 pale cyan bags, 5 pale indigo bags.
+vibrant gold bags contain 5 dim chartreuse bags, 1 mirrored red bag, 3 dark lime bags, 4 shiny silver bags.
+light crimson bags contain 3 muted lavender bags.
+dark lime bags contain 1 faded chartreuse bag, 3 shiny crimson bags, 2 drab aqua bags.
+dotted beige bags contain 1 faded white bag, 5 vibrant yellow bags.
+dim chartreuse bags contain 4 striped lime bags, 2 faded black bags.
+wavy bronze bags contain 5 muted cyan bags, 3 light yellow bags, 4 dotted purple bags.
+striped plum bags contain 2 drab black bags, 1 faded silver bag.
+posh chartreuse bags contain 4 faded blue bags, 2 vibrant crimson bags, 4 dotted purple bags, 4 posh tan bags.
+vibrant yellow bags contain 4 dim tan bags, 1 mirrored fuchsia bag.
+pale salmon bags contain 2 dull tan bags, 2 mirrored crimson bags, 1 drab chartreuse bag, 3 muted crimson bags.
+drab gray bags contain 2 vibrant coral bags.
+mirrored teal bags contain 5 vibrant violet bags.
+striped maroon bags contain 2 dim violet bags, 3 dotted gold bags, 4 bright olive bags.
+clear turquoise bags contain 4 plaid green bags.
+vibrant white bags contain 5 dotted beige bags.
+wavy chartreuse bags contain 1 faded orange bag, 4 shiny lavender bags.
+mirrored gray bags contain 1 clear magenta bag.
+bright aqua bags contain 3 mirrored gold bags, 5 shiny magenta bags, 1 shiny silver bag, 5 posh tan bags.
+plaid violet bags contain 2 muted olive bags, 2 dotted chartreuse bags, 2 faded magenta bags, 1 drab cyan bag.
+plaid olive bags contain 3 wavy lime bags, 2 faded cyan bags, 2 posh tan bags.
+bright crimson bags contain 4 clear beige bags, 1 plaid teal bag, 3 shiny magenta bags.
+shiny salmon bags contain 3 light silver bags, 3 faded orange bags, 3 dim tomato bags, 3 shiny gold bags.
+mirrored red bags contain 5 shiny black bags.
+shiny fuchsia bags contain 1 faded yellow bag, 1 plaid teal bag.
+wavy tomato bags contain 4 light crimson bags, 3 clear blue bags.
+clear lime bags contain 4 dark gray bags, 5 drab tomato bags.
+light maroon bags contain 3 dark plum bags, 4 plaid crimson bags.
+drab yellow bags contain 3 vibrant aqua bags, 5 pale red bags.
+mirrored fuchsia bags contain 3 pale purple bags, 1 clear yellow bag, 1 wavy black bag, 4 pale gray bags.
+clear black bags contain 1 plaid lavender bag, 4 muted indigo bags.
+drab silver bags contain 1 faded green bag, 3 pale black bags.
+clear teal bags contain 2 dotted silver bags.
+plaid indigo bags contain 4 dotted purple bags.
+striped indigo bags contain 1 mirrored indigo bag, 4 faded plum bags, 4 wavy crimson bags.
+light salmon bags contain no other bags.
+dull plum bags contain 4 plaid cyan bags.
+muted tomato bags contain 4 dark violet bags.
+mirrored orange bags contain no other bags.
+striped tomato bags contain 5 dotted chartreuse bags, 2 dark white bags.
+dotted magenta bags contain 2 wavy gold bags, 5 pale gray bags, 2 bright chartreuse bags.
+vibrant blue bags contain 3 dotted cyan bags, 4 clear gold bags, 2 dark cyan bags.
+mirrored crimson bags contain 1 dim salmon bag, 4 posh aqua bags.
+shiny turquoise bags contain 2 striped blue bags, 2 light orange bags, 3 dim fuchsia bags, 2 dark olive bags.
+muted gray bags contain 3 dotted yellow bags, 4 dim orange bags, 3 clear beige bags, 3 posh tan bags.
+dim bronze bags contain 1 light magenta bag, 4 shiny purple bags, 1 light red bag.
+dotted olive bags contain 2 dark crimson bags.
+plaid bronze bags contain 4 bright silver bags, 1 faded lime bag, 3 striped lime bags, 3 drab coral bags.
+posh blue bags contain 2 clear tomato bags.
+plaid coral bags contain 4 clear turquoise bags, 1 plaid brown bag, 1 drab indigo bag.
+faded magenta bags contain 2 wavy gray bags, 4 dark gold bags, 4 shiny white bags, 4 faded black bags.
+light brown bags contain 3 striped red bags, 4 faded black bags, 5 vibrant violet bags.
+dotted turquoise bags contain 2 mirrored orange bags.
+pale bronze bags contain 2 mirrored silver bags, 1 faded cyan bag.
+dark purple bags contain 1 muted lavender bag, 1 dull yellow bag, 5 vibrant tan bags, 1 dark gold bag.
+plaid white bags contain 2 pale turquoise bags, 4 clear green bags.
+wavy magenta bags contain 3 shiny blue bags, 1 dark yellow bag.
+wavy gold bags contain 1 dotted indigo bag.
+dull lavender bags contain 1 striped plum bag, 5 pale gray bags.
+shiny silver bags contain 5 shiny lavender bags, 1 plaid crimson bag, 1 wavy black bag.
+clear blue bags contain 2 plaid bronze bags, 1 shiny purple bag.
+faded chartreuse bags contain 3 dull bronze bags.
+pale blue bags contain 3 plaid yellow bags, 1 pale black bag, 4 clear magenta bags, 3 mirrored silver bags.
+vibrant green bags contain 4 bright magenta bags, 4 dark black bags, 5 wavy chartreuse bags.
+drab tomato bags contain 3 drab orange bags, 4 striped coral bags.
+clear cyan bags contain 3 wavy chartreuse bags, 1 light salmon bag, 2 dim purple bags.
+dim magenta bags contain 4 dim turquoise bags, 1 clear gray bag, 4 dim lime bags, 3 mirrored tomato bags.
+wavy maroon bags contain 5 pale plum bags, 3 pale black bags, 3 striped red bags, 4 drab salmon bags.
+posh gold bags contain 3 dim chartreuse bags, 1 faded blue bag, 4 mirrored teal bags.
+muted aqua bags contain 2 faded maroon bags, 1 mirrored blue bag, 5 pale crimson bags.
+muted orange bags contain 1 muted olive bag.
+posh tan bags contain 4 muted lavender bags, 2 plaid crimson bags, 4 striped lime bags.
+mirrored indigo bags contain 1 muted olive bag, 2 vibrant chartreuse bags, 4 light cyan bags.
+wavy crimson bags contain 4 mirrored violet bags, 2 vibrant olive bags, 5 dull lavender bags, 1 drab cyan bag.
+dim lavender bags contain 4 light salmon bags, 5 plaid tomato bags, 4 drab fuchsia bags.
+dotted yellow bags contain 4 vibrant chartreuse bags.
+light fuchsia bags contain 2 wavy red bags, 2 faded lime bags, 1 pale brown bag, 5 dotted green bags.
+clear beige bags contain 5 drab chartreuse bags, 4 dark olive bags, 5 dim gold bags.
+shiny gold bags contain 1 pale turquoise bag.
+dim tomato bags contain no other bags.
+plaid salmon bags contain 1 striped tan bag, 5 plaid purple bags, 1 mirrored crimson bag.
+dotted lavender bags contain 3 striped teal bags, 1 vibrant gray bag.
+light olive bags contain 3 posh tomato bags, 5 dim coral bags, 4 posh white bags, 2 dark turquoise bags.
+striped silver bags contain 1 clear tomato bag, 1 drab cyan bag.
+striped lavender bags contain 4 posh chartreuse bags, 5 faded coral bags.
+faded beige bags contain 5 muted gold bags, 5 clear gold bags, 2 posh white bags.
+drab indigo bags contain 1 pale magenta bag.
+light blue bags contain 2 light chartreuse bags, 4 drab black bags, 2 dull bronze bags.
+dull gold bags contain 5 dark blue bags, 2 bright green bags.
+faded bronze bags contain 5 dim olive bags.
+mirrored lime bags contain 5 pale crimson bags.
+shiny coral bags contain 3 drab green bags, 3 posh white bags, 4 clear gray bags, 3 muted orange bags.
+clear magenta bags contain 3 plaid olive bags, 4 plaid indigo bags, 1 dull blue bag.
+wavy black bags contain 3 clear cyan bags, 3 dull bronze bags, 2 wavy chartreuse bags.
+pale green bags contain 2 mirrored silver bags, 3 drab blue bags, 5 drab green bags, 4 pale tomato bags.
+drab violet bags contain 1 drab orange bag, 1 vibrant indigo bag, 2 mirrored chartreuse bags.
+light chartreuse bags contain 4 posh white bags, 5 dull bronze bags, 4 wavy coral bags.
+dull black bags contain 4 muted red bags, 4 faded white bags, 5 plaid tomato bags, 2 dark blue bags.
+dark gray bags contain 2 bright green bags, 5 light blue bags, 3 light tan bags, 2 shiny gold bags.
+light turquoise bags contain 5 shiny coral bags, 3 dull brown bags, 3 striped tan bags, 4 striped silver bags.
+mirrored magenta bags contain 3 vibrant silver bags, 4 vibrant crimson bags, 4 shiny coral bags, 1 shiny indigo bag.
+dull lime bags contain 3 pale turquoise bags, 2 bright olive bags.
+mirrored gold bags contain 1 faded silver bag, 4 pale gray bags.
+clear chartreuse bags contain 4 dark gray bags, 1 pale lime bag, 1 plaid fuchsia bag.
+dull indigo bags contain 4 posh silver bags.
+dull yellow bags contain 3 wavy lavender bags, 3 muted maroon bags.
+bright silver bags contain 2 wavy black bags, 1 dim coral bag.
+clear indigo bags contain 1 posh black bag, 4 muted teal bags, 1 wavy maroon bag.
+bright brown bags contain 3 shiny cyan bags, 5 clear green bags, 1 wavy magenta bag.
+shiny crimson bags contain 1 faded black bag, 2 vibrant chartreuse bags.
+striped white bags contain 4 light red bags, 3 dotted cyan bags.
+pale tomato bags contain 1 posh white bag.
+posh salmon bags contain 2 striped white bags, 5 clear purple bags, 5 bright yellow bags.
+faded blue bags contain 5 drab cyan bags, 1 plaid crimson bag, 5 light crimson bags.
+mirrored black bags contain 4 light tan bags, 3 faded blue bags.
+bright red bags contain 3 pale magenta bags, 4 faded chartreuse bags.
+drab lavender bags contain 5 dim red bags, 4 wavy black bags, 4 dull cyan bags, 5 clear gray bags.
+light coral bags contain 4 dark lavender bags, 2 clear orange bags, 2 dull maroon bags.
+bright plum bags contain 1 shiny blue bag, 5 striped salmon bags, 2 plaid olive bags.
+faded tomato bags contain 4 pale turquoise bags.
+wavy purple bags contain 1 light red bag.
+striped crimson bags contain 2 shiny tan bags, 1 striped salmon bag, 5 dotted cyan bags.
+posh olive bags contain 3 vibrant indigo bags.
+plaid red bags contain 4 dotted violet bags, 1 plaid black bag, 4 light chartreuse bags.
+pale aqua bags contain 3 plaid brown bags.
+dotted silver bags contain 5 striped plum bags.
+plaid magenta bags contain 4 clear lime bags, 1 muted chartreuse bag, 1 dark gray bag.
+vibrant plum bags contain 3 clear yellow bags, 1 striped salmon bag.
+faded lime bags contain 5 dull plum bags.
+wavy lavender bags contain 3 dull bronze bags.
+clear olive bags contain 5 pale bronze bags.
+striped cyan bags contain 2 dotted gray bags.
+drab black bags contain no other bags.
+posh turquoise bags contain 1 clear teal bag.
+plaid lime bags contain 5 pale gray bags, 5 shiny black bags, 2 faded tan bags, 4 clear lavender bags.
+drab maroon bags contain 4 posh maroon bags, 3 drab lavender bags, 2 shiny lavender bags.
+dull beige bags contain 3 mirrored coral bags, 2 faded fuchsia bags, 5 bright fuchsia bags.
+dull bronze bags contain 2 mirrored olive bags.
+striped violet bags contain 2 vibrant orange bags, 3 muted indigo bags, 5 light plum bags, 2 dark lavender bags.
+striped fuchsia bags contain 3 striped salmon bags, 4 posh brown bags, 1 posh maroon bag.
+light aqua bags contain 4 clear plum bags, 1 dull orange bag, 5 wavy magenta bags, 5 pale chartreuse bags.
+wavy lime bags contain 1 mirrored teal bag, 1 posh tan bag, 5 clear teal bags, 4 plaid crimson bags.
+plaid fuchsia bags contain 4 dark gold bags, 1 muted red bag, 4 light tomato bags.
+muted white bags contain 5 plaid brown bags, 4 dotted plum bags, 3 dim crimson bags, 3 dim aqua bags.
+pale white bags contain 4 mirrored chartreuse bags, 2 bright lavender bags, 5 striped teal bags.
+vibrant aqua bags contain 3 faded green bags, 4 muted tomato bags, 2 clear lavender bags.
+posh red bags contain 4 bright chartreuse bags, 1 clear red bag.
+striped yellow bags contain 2 faded aqua bags, 3 light fuchsia bags, 5 dotted purple bags, 5 drab coral bags.
+shiny lavender bags contain 2 faded orange bags.
+dull coral bags contain 1 dull tan bag, 2 dull beige bags, 3 faded maroon bags, 1 wavy aqua bag.
+faded violet bags contain 5 clear red bags.
+dark turquoise bags contain 3 light chartreuse bags.
+plaid silver bags contain 2 drab cyan bags, 1 dotted gray bag, 4 pale orange bags.
+pale tan bags contain no other bags.
+light white bags contain 2 shiny lime bags, 5 dull lavender bags, 4 plaid white bags.
+dim beige bags contain 5 dotted silver bags, 5 dark gold bags, 1 muted turquoise bag, 1 pale olive bag.
+muted crimson bags contain 2 faded silver bags, 2 dark olive bags.
+shiny tan bags contain 2 dotted salmon bags.
+dull magenta bags contain 3 drab black bags, 5 dim purple bags, 3 mirrored bronze bags.
+dull white bags contain 1 clear teal bag, 2 faded violet bags, 4 dull bronze bags, 2 dotted gold bags.
+clear green bags contain 3 pale crimson bags.
+dark bronze bags contain 4 shiny cyan bags, 5 shiny white bags.
+vibrant red bags contain 2 dark tomato bags, 3 muted crimson bags.
+striped brown bags contain 4 pale yellow bags.
+light bronze bags contain 5 drab silver bags, 5 wavy purple bags.
+vibrant tomato bags contain 4 mirrored orange bags, 3 faded teal bags.
+bright coral bags contain 4 clear maroon bags, 3 dim chartreuse bags.
+shiny green bags contain 2 muted crimson bags, 5 pale tan bags, 3 drab black bags, 3 striped teal bags.
+mirrored green bags contain 2 light black bags, 5 posh purple bags, 1 posh tan bag, 1 mirrored orange bag.
+dull tan bags contain 3 bright tomato bags.
+muted indigo bags contain 3 wavy coral bags.
+shiny blue bags contain 1 wavy black bag, 2 dull maroon bags.
+posh beige bags contain 5 dim crimson bags, 1 posh white bag, 2 mirrored teal bags, 2 vibrant chartreuse bags.
+dim plum bags contain 2 vibrant chartreuse bags, 2 posh teal bags, 3 drab white bags.
+vibrant teal bags contain 2 dim tomato bags, 2 dim teal bags, 4 drab chartreuse bags.
+wavy olive bags contain 5 vibrant gold bags, 2 drab black bags, 2 shiny lime bags, 2 light coral bags.
+faded white bags contain 4 posh cyan bags, 1 bright red bag, 2 pale olive bags, 3 plaid olive bags.
+pale indigo bags contain 5 dim crimson bags, 1 dim tan bag, 5 plaid green bags.
+pale fuchsia bags contain 4 light purple bags, 4 clear beige bags, 3 muted teal bags, 3 light blue bags.
+faded gray bags contain 1 clear maroon bag, 2 dim fuchsia bags, 5 bright purple bags, 4 striped turquoise bags.
+dark lavender bags contain 1 muted lavender bag, 2 vibrant crimson bags, 1 clear yellow bag.
+light magenta bags contain 5 faded coral bags, 3 muted green bags, 4 mirrored fuchsia bags, 1 clear coral bag.
+plaid cyan bags contain 1 muted crimson bag.
+dim gold bags contain 3 clear cyan bags, 3 dim tomato bags, 3 shiny lavender bags, 2 vibrant teal bags.
+bright tomato bags contain 1 striped red bag, 1 vibrant violet bag, 4 striped turquoise bags.
+drab teal bags contain 2 posh turquoise bags, 1 shiny black bag.
+pale olive bags contain 2 shiny gold bags, 3 posh bronze bags, 4 bright tomato bags, 2 bright olive bags.
+pale brown bags contain 3 clear tomato bags.
+dark yellow bags contain 3 light brown bags.
+pale black bags contain 4 bright silver bags.
+muted brown bags contain 2 light crimson bags, 4 drab chartreuse bags, 5 pale turquoise bags, 4 posh white bags.
+wavy beige bags contain 2 posh maroon bags, 5 dark turquoise bags.
+shiny olive bags contain 1 light salmon bag, 2 light crimson bags.
+dotted teal bags contain 4 pale turquoise bags.
+clear bronze bags contain 1 dotted tomato bag, 5 striped maroon bags, 5 shiny plum bags, 4 clear lime bags.
+dim lime bags contain 3 dim lavender bags.
+shiny aqua bags contain 2 clear plum bags, 1 plaid lavender bag, 2 faded aqua bags, 1 dim purple bag.
+vibrant lime bags contain 4 dotted plum bags, 2 muted gray bags, 1 posh beige bag.
+muted beige bags contain 1 mirrored lavender bag, 4 muted plum bags.
+wavy yellow bags contain 4 posh cyan bags, 5 dim gold bags, 3 vibrant violet bags.
+bright purple bags contain 1 bright chartreuse bag, 5 posh violet bags, 2 pale purple bags.
+vibrant violet bags contain 2 wavy coral bags, 2 pale gray bags.
+faded indigo bags contain 5 muted tomato bags, 2 dull tomato bags.
+mirrored brown bags contain 1 shiny white bag, 4 dotted lavender bags, 3 striped cyan bags, 5 clear crimson bags.
+bright beige bags contain 2 bright salmon bags.
+bright gold bags contain 4 plaid crimson bags.
+drab gold bags contain 5 pale tan bags.
+bright orange bags contain 1 vibrant gold bag.
+shiny brown bags contain 4 plaid lime bags, 4 dull gray bags, 1 pale tomato bag.
+striped beige bags contain 1 clear yellow bag, 1 pale magenta bag, 4 dull bronze bags, 5 bright fuchsia bags.
+clear brown bags contain 2 bright salmon bags, 2 vibrant turquoise bags.
+muted turquoise bags contain 5 dim crimson bags, 1 drab chartreuse bag.
+dark crimson bags contain 5 bright tomato bags.
+clear yellow bags contain 2 dim olive bags.
+bright lime bags contain 5 faded gray bags, 4 dull gold bags, 3 dark salmon bags, 4 posh lime bags.
+muted coral bags contain 3 posh bronze bags, 3 striped gold bags.
+dark salmon bags contain 2 vibrant indigo bags, 5 posh coral bags, 3 faded silver bags.
+vibrant orange bags contain 4 dark turquoise bags, 2 vibrant lime bags.
+pale violet bags contain 1 shiny brown bag, 2 dim plum bags, 3 dull crimson bags, 3 bright orange bags.
+shiny purple bags contain 1 vibrant lavender bag, 1 dotted yellow bag.
+drab orange bags contain 3 faded aqua bags.
+posh brown bags contain 3 pale magenta bags, 4 faded orange bags, 1 drab chartreuse bag.
+shiny bronze bags contain 3 light magenta bags, 3 drab indigo bags, 5 vibrant yellow bags.
+muted teal bags contain 3 dim olive bags.
+bright turquoise bags contain 3 bright chartreuse bags, 4 mirrored tomato bags.
+muted chartreuse bags contain 4 faded gray bags, 1 dull salmon bag, 3 clear beige bags.
+clear white bags contain 3 muted maroon bags.
+posh violet bags contain 4 shiny white bags, 1 dull orange bag.
+dotted brown bags contain 4 muted aqua bags.
+mirrored plum bags contain 5 clear plum bags, 4 faded tomato bags.
+drab crimson bags contain 1 pale white bag, 4 dotted maroon bags, 2 drab beige bags, 5 drab tan bags.
+plaid black bags contain 1 light salmon bag, 3 mirrored orange bags, 2 dim purple bags.
+dim orange bags contain 4 wavy black bags, 1 clear red bag.
+faded plum bags contain 1 posh violet bag, 1 pale silver bag, 4 muted magenta bags.
+vibrant salmon bags contain 2 dotted red bags, 1 dull maroon bag, 1 plaid tomato bag.
+muted cyan bags contain 5 posh aqua bags, 2 faded silver bags, 2 striped red bags, 4 dim tomato bags.
+muted salmon bags contain 5 muted teal bags, 3 striped cyan bags.
+dim cyan bags contain 5 drab brown bags, 4 muted red bags, 1 wavy coral bag.
+drab blue bags contain 4 faded aqua bags, 2 pale gray bags.
+dotted lime bags contain 3 light olive bags, 2 light tomato bags, 5 dull gold bags, 2 dotted gold bags.
+muted violet bags contain 4 wavy coral bags, 4 pale crimson bags, 1 dim coral bag, 2 mirrored coral bags.
+vibrant maroon bags contain 5 wavy aqua bags, 4 muted orange bags, 3 dull tomato bags.
+light tomato bags contain 3 dim tomato bags, 1 dim purple bag, 2 plaid gray bags, 3 striped red bags.
+dotted violet bags contain 3 muted green bags, 2 faded silver bags.
+mirrored coral bags contain 5 drab black bags, 2 vibrant crimson bags, 2 mirrored gold bags.
+muted black bags contain 3 mirrored plum bags, 2 bright olive bags.
+faded olive bags contain 1 vibrant orange bag, 3 faded gray bags, 3 shiny green bags, 2 muted lavender bags.
+clear gold bags contain 4 dim purple bags.
+striped lime bags contain 2 pale gray bags, 5 light brown bags, 5 vibrant violet bags, 4 bright tomato bags.
+drab coral bags contain 2 pale tan bags, 5 striped teal bags, 1 drab indigo bag.
+dotted purple bags contain 2 faded chartreuse bags, 3 clear beige bags, 4 striped turquoise bags.
+light gold bags contain 2 dark gold bags, 5 striped salmon bags.
+faded teal bags contain 5 plaid black bags, 5 dotted crimson bags, 3 mirrored magenta bags.
+dull silver bags contain 5 bright yellow bags, 4 drab aqua bags, 4 shiny indigo bags.
+shiny magenta bags contain 5 pale purple bags.
+dull salmon bags contain 2 shiny black bags, 1 bright tomato bag.
+posh fuchsia bags contain 1 pale teal bag, 1 clear orange bag.
+mirrored lavender bags contain 2 posh brown bags, 3 light tomato bags, 5 plaid aqua bags, 2 vibrant olive bags.
+posh tomato bags contain 2 drab blue bags.
+faded maroon bags contain 2 dull beige bags, 2 dark gray bags.
+dotted tomato bags contain 4 mirrored olive bags, 4 dull gold bags, 2 dotted silver bags, 4 wavy maroon bags.
+muted bronze bags contain 2 dim olive bags, 2 posh lime bags, 3 drab coral bags, 5 wavy silver bags.
+wavy aqua bags contain 2 striped lime bags, 4 wavy lime bags, 2 dim tan bags, 4 faded cyan bags.
+dull violet bags contain 4 bright gold bags, 2 dim coral bags.
+posh gray bags contain 2 dull bronze bags, 3 faded blue bags, 4 posh silver bags.
+striped gold bags contain 4 wavy lavender bags, 2 muted gray bags, 3 wavy yellow bags.
+vibrant black bags contain 3 shiny silver bags, 1 faded yellow bag.
+dull teal bags contain 4 light blue bags, 3 posh lavender bags.
+muted green bags contain 4 vibrant violet bags.
+plaid green bags contain 3 dim purple bags, 4 dim teal bags, 1 muted cyan bag.
+plaid blue bags contain 2 light purple bags, 4 dim gold bags, 5 pale black bags, 5 dim lavender bags.
+vibrant turquoise bags contain 5 drab orange bags, 4 dark gold bags.
+muted plum bags contain 3 dull aqua bags, 1 wavy lime bag, 3 dark green bags.
+bright fuchsia bags contain 5 wavy gray bags, 1 dim teal bag, 5 muted cyan bags.
+clear violet bags contain 1 bright salmon bag.
+dotted chartreuse bags contain 4 pale plum bags, 2 bright purple bags.
+vibrant gray bags contain 4 dark turquoise bags, 5 faded gold bags, 3 light olive bags.
+dark tan bags contain 2 light olive bags, 1 vibrant fuchsia bag, 4 vibrant blue bags.
+mirrored violet bags contain 2 muted gray bags.
+mirrored maroon bags contain 5 mirrored coral bags, 2 faded lime bags, 3 dark gray bags.
+dotted black bags contain 1 clear violet bag, 2 wavy chartreuse bags, 3 faded silver bags, 2 plaid gray bags.
+shiny maroon bags contain 3 wavy turquoise bags, 2 dim purple bags, 1 shiny silver bag, 2 dim cyan bags.
+dull cyan bags contain 3 mirrored olive bags.
+drab brown bags contain 4 striped lime bags, 2 bright aqua bags.
+dim crimson bags contain 2 drab black bags, 2 vibrant teal bags.
+dim brown bags contain 2 mirrored beige bags.
+vibrant silver bags contain 1 dark gold bag, 4 vibrant indigo bags, 5 dim red bags, 3 light blue bags.
+dull olive bags contain 2 clear red bags, 1 vibrant plum bag.
+faded purple bags contain 5 faded olive bags.
+pale yellow bags contain 3 vibrant teal bags, 3 shiny violet bags, 2 dull yellow bags.
+posh black bags contain 4 clear beige bags, 4 striped salmon bags, 4 wavy lavender bags.
+dotted cyan bags contain 5 shiny crimson bags, 5 dark lavender bags, 5 faded green bags, 3 dull lime bags.
+mirrored silver bags contain 4 light lime bags, 1 posh tomato bag.
+pale gold bags contain 2 striped teal bags, 3 wavy chartreuse bags, 2 plaid tomato bags.
+dotted white bags contain 2 muted purple bags, 2 posh white bags, 3 faded plum bags.
+mirrored tan bags contain 2 clear bronze bags, 2 clear orange bags, 5 striped gray bags.
+plaid beige bags contain 4 drab turquoise bags.
+faded red bags contain 3 vibrant yellow bags, 3 pale brown bags, 4 dim beige bags, 5 wavy chartreuse bags.
+pale coral bags contain 3 clear coral bags.
+dull orange bags contain 5 wavy chartreuse bags, 5 plaid cyan bags.
+dull brown bags contain 5 plaid olive bags, 3 faded chartreuse bags, 3 mirrored crimson bags.
+mirrored aqua bags contain 5 faded green bags.
+vibrant tan bags contain 1 dark turquoise bag, 4 plaid lime bags.
+faded fuchsia bags contain 4 clear gray bags, 4 faded silver bags.
+dim purple bags contain 5 dull lavender bags, 4 faded black bags, 1 muted cyan bag.
+posh purple bags contain 1 wavy turquoise bag, 1 drab cyan bag, 2 dull coral bags, 4 posh yellow bags.
+drab turquoise bags contain 3 dull black bags, 5 dotted bronze bags.
+shiny orange bags contain 5 plaid crimson bags, 4 dotted coral bags.
+plaid orange bags contain 3 wavy gray bags, 5 plaid crimson bags, 2 striped plum bags, 5 pale beige bags.
+vibrant bronze bags contain 1 posh turquoise bag, 3 plaid turquoise bags, 1 dotted crimson bag.
+clear tomato bags contain 5 mirrored fuchsia bags.
+wavy coral bags contain 2 mirrored orange bags.
+posh coral bags contain 5 dotted salmon bags.
+bright tan bags contain 4 drab gray bags, 4 vibrant plum bags.
+dotted gray bags contain 1 dull lime bag, 4 dotted tomato bags, 4 faded gold bags.
+pale red bags contain 2 mirrored olive bags, 1 faded blue bag, 1 dark crimson bag, 3 striped teal bags.
+striped aqua bags contain 2 drab black bags, 5 dull bronze bags, 3 pale purple bags, 4 faded silver bags.
+plaid purple bags contain 3 bright salmon bags, 2 dim beige bags, 3 faded red bags.
+drab purple bags contain 4 dotted black bags, 2 shiny black bags, 1 light plum bag, 1 dotted gold bag.
+muted purple bags contain 3 pale crimson bags.
+posh silver bags contain 4 bright gold bags, 1 dim coral bag, 2 drab chartreuse bags, 1 dim chartreuse bag.
+dark black bags contain 1 bright green bag, 5 plaid cyan bags, 4 dotted purple bags.
+striped coral bags contain 3 shiny lavender bags.
+shiny yellow bags contain 4 dim tomato bags, 1 drab white bag.
+bright magenta bags contain 2 muted silver bags, 3 dull bronze bags, 1 faded blue bag.
+light black bags contain 4 posh silver bags.
+pale purple bags contain 5 dull lavender bags, 1 mirrored orange bag.
+striped salmon bags contain 3 faded chartreuse bags, 2 posh white bags, 1 striped lime bag, 3 drab cyan bags.
+dull fuchsia bags contain 2 plaid tomato bags.
+plaid maroon bags contain 5 dotted red bags, 2 vibrant magenta bags, 4 dotted purple bags.
+posh yellow bags contain 2 wavy beige bags, 5 light yellow bags, 3 striped gray bags.
+dull turquoise bags contain 1 drab lavender bag, 4 faded crimson bags, 2 drab purple bags.
+wavy silver bags contain 5 dotted cyan bags, 2 faded blue bags, 2 faded aqua bags.
+clear orange bags contain 5 posh silver bags, 1 vibrant teal bag, 1 pale tomato bag, 3 dull tomato bags.
+drab chartreuse bags contain no other bags.
+shiny black bags contain 5 dim teal bags, 1 faded silver bag, 2 posh beige bags, 1 bright olive bag.
+pale teal bags contain 2 dull beige bags.
+drab plum bags contain 5 pale beige bags, 2 wavy maroon bags.
+vibrant lavender bags contain 4 wavy yellow bags.
+dim turquoise bags contain 5 shiny crimson bags.
+plaid tan bags contain 5 clear purple bags, 2 light indigo bags, 4 plaid cyan bags.
+pale silver bags contain 1 pale green bag, 4 striped beige bags.
+mirrored bronze bags contain 1 drab orange bag, 2 posh lavender bags, 2 muted gray bags.
+plaid tomato bags contain 4 striped red bags, 3 bright olive bags.
+bright indigo bags contain 4 dull tan bags.
+light violet bags contain 5 faded magenta bags, 5 drab tomato bags.
+clear aqua bags contain 1 plaid gray bag.
+drab salmon bags contain 5 faded silver bags, 1 bright tomato bag, 1 light lime bag.
+light teal bags contain 5 wavy brown bags, 2 muted indigo bags, 2 pale gold bags.
+drab red bags contain 2 shiny chartreuse bags, 3 dim yellow bags, 3 vibrant teal bags, 3 mirrored silver bags.
+bright white bags contain 5 dotted tan bags, 4 drab beige bags, 3 dim indigo bags, 2 dotted white bags.
+dotted fuchsia bags contain 3 faded tomato bags, 1 dotted lavender bag.
+dotted aqua bags contain 4 clear plum bags, 4 faded maroon bags, 1 posh bronze bag.
+light purple bags contain 5 dotted cyan bags, 4 posh olive bags, 5 plaid fuchsia bags, 3 striped white bags.
+shiny indigo bags contain 2 mirrored gold bags, 4 pale magenta bags, 5 shiny white bags, 4 posh tan bags.
+pale turquoise bags contain 1 pale tan bag, 4 striped red bags, 1 bright olive bag.
+plaid aqua bags contain 3 plaid black bags, 3 dim crimson bags.
+posh cyan bags contain 3 dim tomato bags, 4 pale crimson bags, 4 shiny gold bags.
+mirrored white bags contain 2 faded cyan bags.
+shiny chartreuse bags contain 3 muted maroon bags, 2 dotted teal bags.
+dim green bags contain 4 light salmon bags, 1 muted crimson bag, 2 striped beige bags.
+striped blue bags contain 4 dark bronze bags, 5 faded plum bags, 3 bright white bags.
+drab lime bags contain 4 dull tomato bags.
+clear purple bags contain 2 drab chartreuse bags, 4 clear green bags.
+dotted blue bags contain 5 dim purple bags, 3 dull brown bags.
+vibrant cyan bags contain 2 drab indigo bags, 4 faded chartreuse bags.
+light beige bags contain 3 dark orange bags, 3 vibrant cyan bags.
+light lavender bags contain 1 muted cyan bag, 5 faded tan bags.
+dim fuchsia bags contain 2 pale salmon bags.
+mirrored purple bags contain 2 clear red bags.
+faded brown bags contain 1 clear tan bag, 4 faded crimson bags.
+muted magenta bags contain 5 pale tomato bags, 3 muted maroon bags.
+pale beige bags contain 5 dark gold bags, 1 dull beige bag.
+vibrant brown bags contain 2 striped gold bags, 1 bright gold bag.
+clear coral bags contain 4 pale crimson bags, 1 dark teal bag, 4 mirrored coral bags, 4 striped gold bags.
+striped tan bags contain 4 dim violet bags.
+pale chartreuse bags contain 2 vibrant blue bags, 5 dark turquoise bags, 2 faded olive bags.
+posh plum bags contain 1 plaid aqua bag.
+striped purple bags contain 3 shiny tomato bags, 5 posh purple bags.
+dark gold bags contain 5 vibrant crimson bags, 2 light tomato bags, 3 light salmon bags, 3 muted brown bags.
+shiny cyan bags contain 1 vibrant crimson bag, 5 drab indigo bags.
+bright yellow bags contain 3 plaid indigo bags.
+bright blue bags contain 5 mirrored magenta bags.
+dotted salmon bags contain 5 vibrant crimson bags, 2 posh chartreuse bags, 5 wavy gray bags, 4 pale turquoise bags.
+dim olive bags contain 1 clear cyan bag.
+striped turquoise bags contain 5 faded silver bags, 3 pale tan bags, 5 faded orange bags, 2 bright olive bags.
+vibrant beige bags contain 3 faded yellow bags, 3 bright green bags, 3 faded bronze bags, 4 drab fuchsia bags.
+clear maroon bags contain 1 vibrant indigo bag.
+vibrant coral bags contain 2 mirrored tomato bags, 5 dull bronze bags, 1 vibrant teal bag, 3 pale salmon bags.
+dotted orange bags contain 2 plaid green bags, 4 striped violet bags, 4 bright chartreuse bags, 4 dotted plum bags.
+dull tomato bags contain 2 vibrant crimson bags.
+wavy teal bags contain 1 bright orange bag.
+dark teal bags contain 4 dim tan bags, 4 striped gray bags, 4 dim red bags, 4 plaid bronze bags.
+vibrant indigo bags contain 3 drab coral bags, 2 plaid green bags, 4 shiny gold bags, 3 wavy coral bags.
+striped red bags contain 4 faded silver bags, 4 light salmon bags, 3 drab black bags.
+drab aqua bags contain 5 faded black bags.
+wavy plum bags contain 4 posh blue bags, 5 striped olive bags, 3 shiny violet bags, 4 bright silver bags.
+posh lavender bags contain 3 wavy silver bags, 1 drab lavender bag.
+dotted red bags contain 5 drab bronze bags, 5 plaid gray bags.
+dark orange bags contain 4 mirrored blue bags, 1 drab black bag.
+bright lavender bags contain 4 shiny magenta bags, 2 bright tomato bags, 3 dim salmon bags, 4 dim purple bags.
+mirrored chartreuse bags contain 2 wavy black bags, 4 dull cyan bags, 5 striped coral bags.
+mirrored tomato bags contain 5 clear beige bags.
+wavy fuchsia bags contain 2 muted silver bags, 2 shiny gold bags.
+muted lime bags contain 2 striped turquoise bags, 3 dim tan bags.
+shiny white bags contain 4 mirrored olive bags.
+posh maroon bags contain 3 vibrant violet bags, 5 striped turquoise bags, 2 dull lavender bags, 4 faded orange bags.
+faded aqua bags contain 2 faded orange bags, 2 pale magenta bags, 1 posh white bag.
+mirrored blue bags contain 5 pale purple bags, 2 light red bags, 2 striped teal bags, 4 shiny crimson bags.
+dotted plum bags contain 1 light chartreuse bag, 5 drab tan bags, 3 pale red bags.
+muted tan bags contain 3 drab cyan bags, 2 posh olive bags, 1 dim tomato bag.
+shiny tomato bags contain 3 mirrored cyan bags, 5 dim yellow bags.
+pale lavender bags contain 2 dull beige bags.
+pale orange bags contain 1 posh gold bag.
+wavy green bags contain 4 posh bronze bags.
+faded lavender bags contain 3 clear gold bags, 4 mirrored cyan bags, 4 faded silver bags, 5 posh chartreuse bags.
+posh teal bags contain 1 shiny purple bag, 4 dotted violet bags, 1 dotted tomato bag, 5 dull indigo bags.
+clear crimson bags contain 2 shiny lavender bags.
+dim black bags contain 2 vibrant coral bags, 2 drab green bags.
+dull crimson bags contain 3 vibrant orange bags, 2 drab salmon bags.
+muted gold bags contain 3 posh chartreuse bags, 4 striped gold bags, 4 drab brown bags, 2 dim black bags.
+dull chartreuse bags contain 3 clear fuchsia bags.
+light orange bags contain 5 clear orange bags, 5 faded bronze bags, 3 clear crimson bags.
+dark tomato bags contain 5 dotted chartreuse bags, 3 dull gray bags, 5 muted crimson bags.
+dark brown bags contain 3 posh red bags.
+faded green bags contain 1 dark white bag.
+dark olive bags contain 4 vibrant teal bags, 3 pale magenta bags, 4 pale gray bags.
+striped bronze bags contain 3 striped tan bags, 5 dark gray bags, 4 vibrant white bags.
+striped black bags contain 1 striped turquoise bag, 1 vibrant olive bag, 1 striped salmon bag.
+clear plum bags contain 4 wavy chartreuse bags, 1 pale bronze bag, 2 striped plum bags.
+faded tan bags contain 2 muted cyan bags, 4 dim salmon bags, 3 vibrant crimson bags, 4 striped plum bags.
+faded silver bags contain no other bags.
+light silver bags contain 4 muted gray bags, 3 mirrored crimson bags, 3 dull tan bags, 2 drab indigo bags.
+dim aqua bags contain 2 posh tomato bags, 2 muted coral bags, 5 wavy gray bags, 3 dull tan bags.
+vibrant crimson bags contain 1 shiny lavender bag, 3 bright tomato bags.
+dim maroon bags contain 4 light olive bags.
+bright maroon bags contain 2 faded tan bags, 5 pale tomato bags, 5 dotted purple bags.
+dim gray bags contain 1 muted gold bag, 4 shiny magenta bags, 2 wavy salmon bags, 2 posh violet bags.
+dim coral bags contain 3 striped coral bags, 5 clear gold bags, 3 wavy chartreuse bags.
+posh indigo bags contain 3 dull salmon bags.
+striped green bags contain 3 vibrant crimson bags, 4 plaid plum bags, 4 muted brown bags.
+dull purple bags contain 3 drab gold bags, 1 plaid gray bag, 4 striped silver bags.
+light yellow bags contain 3 pale salmon bags, 5 dark cyan bags, 3 dull tomato bags, 3 mirrored silver bags.
+shiny red bags contain 3 faded gold bags, 1 light salmon bag, 5 mirrored turquoise bags.
+vibrant magenta bags contain 1 drab tomato bag, 5 plaid cyan bags.
+plaid lavender bags contain 1 dull lavender bag, 5 vibrant black bags, 2 muted olive bags, 4 shiny lavender bags.
+light cyan bags contain 1 bright silver bag.
+dark plum bags contain 2 drab salmon bags, 3 dull violet bags, 3 posh lime bags.
+dull green bags contain 4 bright gold bags, 2 posh gold bags, 2 striped plum bags.
+wavy salmon bags contain 3 faded gray bags, 5 dotted cyan bags, 3 plaid maroon bags.
+pale lime bags contain 1 shiny purple bag.
+shiny plum bags contain 3 mirrored magenta bags, 4 clear violet bags, 5 dull tomato bags, 5 dotted violet bags.
+dim red bags contain 2 posh white bags, 4 drab cyan bags, 1 dark yellow bag, 1 pale purple bag.
+light red bags contain 3 dotted indigo bags, 4 bright tomato bags, 1 mirrored olive bag, 4 pale turquoise bags.
+dim yellow bags contain 5 faded aqua bags, 2 shiny purple bags, 1 plaid bronze bag.
+drab magenta bags contain 4 dotted coral bags, 3 plaid lime bags.
+clear gray bags contain 5 plaid green bags, 3 pale purple bags.
+plaid turquoise bags contain 4 mirrored crimson bags, 2 muted lavender bags, 3 light blue bags, 2 dull blue bags.
+mirrored turquoise bags contain 5 muted magenta bags, 4 light red bags.
+pale plum bags contain 3 clear beige bags, 5 striped plum bags, 4 striped lime bags, 2 striped teal bags.
+vibrant chartreuse bags contain 2 drab chartreuse bags, 2 striped red bags, 4 dim teal bags.
+striped gray bags contain 3 striped red bags, 1 drab green bag.
+muted maroon bags contain 4 clear yellow bags, 1 dim tan bag, 3 vibrant cyan bags, 1 bright tomato bag.
+posh aqua bags contain 3 faded silver bags, 5 pale tan bags, 2 striped red bags, 3 light salmon bags.
+dotted bronze bags contain 4 striped gold bags, 5 dark lime bags, 2 pale magenta bags, 1 pale salmon bag.
+dark aqua bags contain 4 dull salmon bags, 2 striped salmon bags, 5 clear turquoise bags.
+plaid brown bags contain 4 posh silver bags.
+bright cyan bags contain 2 posh yellow bags, 5 posh lavender bags, 4 shiny cyan bags.
+dark indigo bags contain 5 pale turquoise bags, 4 light crimson bags, 2 dim orange bags.
+muted yellow bags contain 3 light coral bags, 1 vibrant turquoise bag, 5 clear magenta bags, 2 pale olive bags.
+clear fuchsia bags contain 2 posh silver bags, 1 striped yellow bag, 3 striped lime bags.
+bright salmon bags contain 2 vibrant cyan bags.
+dotted maroon bags contain 2 posh violet bags.
+shiny violet bags contain 3 dim teal bags.
+plaid teal bags contain 2 drab orange bags, 1 dim violet bag, 1 bright fuchsia bag.
+faded salmon bags contain 5 drab orange bags, 3 clear indigo bags, 1 plaid cyan bag.
+shiny beige bags contain 5 bright brown bags, 4 pale brown bags.
+plaid yellow bags contain 3 vibrant crimson bags.
+light indigo bags contain 4 vibrant cyan bags, 2 dotted purple bags.
+dull aqua bags contain 5 pale tan bags.
+posh green bags contain 2 light silver bags, 3 posh lime bags, 2 vibrant olive bags.
+dark beige bags contain 3 dotted coral bags, 5 wavy chartreuse bags.
+mirrored salmon bags contain 4 posh blue bags, 5 posh yellow bags, 4 posh fuchsia bags, 3 drab tomato bags.
+pale crimson bags contain 3 dim tomato bags, 3 vibrant teal bags, 5 dotted silver bags.
+wavy gray bags contain 1 dim olive bag, 4 plaid green bags.
+bright olive bags contain 5 faded orange bags, 1 plaid black bag, 2 plaid gray bags, 3 faded silver bags.
+light lime bags contain 5 dull lavender bags, 2 posh aqua bags, 4 dull aqua bags.
+dim salmon bags contain 3 muted lavender bags, 1 light lime bag.
+dark white bags contain 1 posh aqua bag, 3 wavy black bags.
+posh magenta bags contain 5 striped silver bags, 3 wavy bronze bags, 3 faded beige bags.
+mirrored cyan bags contain 5 light brown bags, 1 muted cyan bag, 4 posh silver bags.
+dark magenta bags contain 2 muted indigo bags, 2 muted coral bags.
+clear salmon bags contain 3 pale chartreuse bags.
+dim tan bags contain 2 pale crimson bags.
+bright gray bags contain 3 mirrored fuchsia bags.
+bright green bags contain 5 plaid crimson bags, 3 striped turquoise bags.
+faded black bags contain 1 striped red bag, 1 dim teal bag, 5 faded silver bags, 3 striped plum bags.
+wavy orange bags contain 1 dark white bag.
+wavy cyan bags contain 5 light olive bags.
+muted blue bags contain 5 wavy maroon bags, 1 light tomato bag.
+light green bags contain 1 shiny teal bag, 5 bright lime bags, 4 drab white bags, 5 posh aqua bags.
+drab white bags contain 4 posh silver bags, 4 mirrored crimson bags.
+bright teal bags contain 5 dotted purple bags, 1 faded yellow bag, 4 shiny coral bags.
+light plum bags contain 3 pale cyan bags, 5 faded tan bags.
+faded coral bags contain 4 dull gray bags.
+dotted coral bags contain 2 posh bronze bags, 5 posh aqua bags, 2 mirrored violet bags.
+pale cyan bags contain 2 mirrored orange bags, 2 dim tomato bags.
+drab beige bags contain 4 bright aqua bags, 2 mirrored tomato bags, 2 plaid turquoise bags, 1 wavy chartreuse bag.
+dark maroon bags contain 1 dull gray bag, 2 mirrored olive bags, 1 light olive bag, 1 shiny fuchsia bag.
+wavy white bags contain 4 dull lavender bags.
+dull gray bags contain 5 plaid black bags, 3 light lime bags, 2 wavy chartreuse bags, 5 dim tomato bags.
+clear red bags contain 5 light crimson bags, 3 faded chartreuse bags, 4 clear teal bags, 4 mirrored blue bags.
+bright bronze bags contain 1 clear magenta bag, 2 clear gray bags, 2 dull coral bags, 5 vibrant gray bags.
diff --git a/2020/07/sol1.pl b/2020/07/sol1.pl
@@ -0,0 +1,43 @@
+#!/usr/bin/env perl
+# idea:
+# this is a weighted DAG. The natural way the rules flow, I _want_ to make it
+# so that the edges go from container->containee BUT, for the problem we want
+# to solve, it makes much more sense to build the graph containee->[container]
+# so that we can then do a quick walk of all possible containers
+use strict;
+use warnings;
+
+
+# build the graph
+my %h;
+my %all;
+open(my $fh, '<', 'input') or die "$!";
+for my $rule (<$fh>) {
+ my ($container, $containees) = $rule =~ /^(.*) bags contain (.*)\.$/;
+ $all{$container} = 1;
+ if ($containees eq 'no other bags') {
+ # skip!
+ next;
+ }
+ my @subs = map { s/\d+ (.*) bag(?:s)?/$1/r } split(', ', $containees);
+ $all{$_} = 1 for @subs;
+ $all{$container} = 1;
+ for my $s (@subs) {
+ push(@{$h{$s}}, $container);
+ }
+}
+
+# walk the walk
+my @q = @{$h{'shiny gold'}}; # direct containers
+my %seen;
+while (my $i = shift @q) {
+ next if $seen{$i};
+ $seen{$i} = 1;
+ if (exists $h{$i}) {
+ # I suppose there might be some outer-only bags
+ push (@q, @{$h{$i}});
+ }
+}
+printf "%d out of %d\n", scalar keys %seen, scalar keys %all;
+
+exit(0);
diff --git a/2020/07/sol2.pl b/2020/07/sol2.pl
@@ -0,0 +1,41 @@
+#!/usr/bin/env perl
+# idea:
+# this is a weighted DAG. This time, we go container->containee
+use strict;
+use warnings;
+
+
+# build the graph
+my %h;
+open(my $fh, '<', 'input') or die "$!";
+for my $rule (<$fh>) {
+ my ($container, $containees) = $rule =~ /^(.*) bags contain (.*)\.$/;
+ if ($containees eq 'no other bags') {
+ next;
+ }
+ my @subs = split(', ', $containees);
+ for my $s (@subs) {
+ my ($count, $name) = $s =~ m/(\d+) (.*) bag(?:s)?/;
+ push(@{$h{$container}}, [$count, $name]);
+ }
+}
+
+# walk the walk
+printf "%d\n", num_bags('shiny gold');
+
+sub num_bags {
+ my ($b) = @_;
+ if (!exists $h{$b}) {
+ # no other bags needed
+ return 0;
+ }
+ my $n = 0;
+ for my $s (@{$h{$b}}) {
+ # Don't forget to add yourself!
+ $n += ($s->[0] * num_bags($s->[1])) + $s->[0];
+ }
+ return $n;
+}
+
+exit(0);
+
diff --git a/2020/08/input b/2020/08/input
@@ -0,0 +1,625 @@
+jmp +301
+acc +27
+nop +299
+jmp +168
+acc +0
+acc +48
+acc -5
+jmp +420
+jmp +155
+acc -16
+acc -15
+nop +582
+acc -5
+jmp +490
+acc +10
+nop +300
+acc -2
+acc -1
+jmp +252
+jmp +2
+jmp +234
+acc +36
+acc +50
+jmp +564
+jmp +102
+jmp +473
+acc +37
+acc +1
+acc +20
+jmp +355
+acc +28
+acc -14
+acc +22
+jmp +329
+acc +44
+jmp +1
+jmp +23
+nop +312
+jmp +251
+acc +12
+acc +39
+acc +33
+jmp -21
+acc +28
+acc +14
+acc +42
+acc +33
+jmp +502
+jmp +123
+acc +24
+jmp +11
+acc -8
+nop +218
+nop +516
+jmp +244
+jmp -36
+nop +192
+acc -11
+jmp +100
+jmp +299
+jmp +400
+acc +29
+acc +13
+jmp +1
+acc +45
+jmp +458
+acc +6
+acc +15
+jmp +542
+acc +38
+acc -15
+acc -15
+acc -11
+jmp +474
+acc +0
+acc +1
+jmp +55
+acc +14
+acc +13
+acc +37
+acc -18
+jmp +95
+jmp -73
+acc +25
+jmp -54
+jmp +413
+acc -17
+acc +25
+acc +22
+jmp +405
+jmp +151
+jmp +1
+acc -14
+acc +33
+acc +30
+jmp -86
+acc +32
+acc -3
+acc +26
+acc +7
+jmp +493
+acc +44
+jmp +1
+nop +357
+acc +47
+jmp +412
+jmp +321
+acc -5
+jmp +12
+acc +18
+acc -1
+acc +29
+jmp +430
+acc +35
+acc +34
+jmp +1
+acc -6
+jmp +184
+acc -12
+jmp -36
+acc +22
+acc -5
+acc +14
+acc +0
+jmp +198
+jmp +293
+nop +76
+acc +8
+acc +13
+jmp +464
+jmp +309
+acc -19
+acc +27
+acc -10
+jmp +29
+acc -17
+jmp -77
+acc +49
+nop +224
+acc +0
+jmp +77
+acc +35
+acc +3
+jmp +317
+nop +27
+acc +6
+jmp +164
+acc +10
+acc +41
+acc -2
+acc -8
+jmp +347
+acc +14
+nop +148
+jmp +302
+acc +21
+acc +8
+jmp +282
+acc +3
+acc +12
+jmp +138
+acc -10
+jmp +311
+acc -6
+acc -10
+acc +13
+jmp +116
+acc +31
+acc +39
+acc +28
+jmp +244
+nop +59
+acc +16
+jmp +1
+jmp +436
+jmp -31
+acc -12
+acc +43
+jmp -135
+acc -1
+acc +35
+acc +50
+acc +0
+jmp +398
+jmp -83
+acc +40
+acc +26
+acc -8
+jmp +393
+acc +28
+acc -7
+acc +43
+jmp +231
+jmp -22
+acc -1
+acc -18
+acc +19
+jmp -111
+acc +38
+acc +21
+acc +7
+jmp +134
+acc +8
+acc +18
+acc -9
+acc -7
+jmp +24
+acc +5
+acc +0
+jmp -46
+acc +2
+acc -12
+acc -17
+acc +36
+jmp -88
+nop -71
+jmp +181
+jmp -15
+jmp +52
+acc +15
+acc +0
+jmp -32
+acc -6
+nop +166
+acc +10
+acc +38
+jmp +123
+acc +9
+jmp -151
+jmp +231
+jmp +1
+acc +34
+jmp +186
+jmp +96
+acc +48
+acc +9
+jmp +198
+acc +7
+acc +35
+acc +22
+jmp +82
+nop +1
+nop -156
+nop -49
+jmp +91
+acc +8
+acc -17
+jmp -53
+acc +29
+nop +283
+acc -2
+nop +50
+jmp +290
+jmp +296
+jmp +219
+jmp +268
+jmp -119
+nop +353
+jmp -157
+acc +21
+acc +30
+jmp +345
+acc -9
+jmp -119
+acc +0
+jmp -196
+acc +33
+acc +0
+acc +1
+jmp -248
+acc +15
+jmp -44
+acc +9
+acc +46
+acc +50
+jmp +257
+acc -6
+acc -16
+jmp +320
+acc +35
+nop -4
+jmp -5
+acc +30
+acc +27
+jmp +1
+jmp +296
+acc +8
+acc +40
+jmp +210
+acc -14
+acc +34
+acc +42
+jmp +173
+acc +16
+acc +47
+acc +11
+acc +32
+jmp -206
+jmp -39
+acc +45
+jmp +247
+acc -17
+nop +261
+nop -254
+acc +48
+jmp +62
+acc +50
+acc +26
+acc +1
+jmp +130
+acc -14
+nop +47
+acc -9
+jmp -276
+jmp -104
+jmp +135
+acc +40
+jmp -296
+jmp +11
+acc +2
+acc -17
+jmp -238
+acc +34
+acc +37
+jmp -166
+nop -205
+acc -4
+acc +22
+jmp +56
+acc +1
+nop -210
+nop -30
+acc -18
+jmp -250
+jmp -107
+acc +45
+acc +50
+acc +3
+acc +3
+jmp -63
+acc +35
+jmp +1
+acc -5
+nop +255
+jmp +254
+jmp +210
+acc +10
+acc +7
+jmp +207
+acc +17
+acc +25
+nop -22
+jmp +62
+acc +35
+acc +18
+acc +22
+acc +10
+jmp -186
+acc +24
+acc +32
+jmp -31
+jmp -131
+jmp -337
+acc +41
+acc -10
+acc +42
+jmp +207
+acc -16
+acc -14
+nop -225
+acc -15
+jmp +70
+nop -303
+acc -10
+acc +11
+acc +17
+jmp +234
+acc -8
+acc +33
+jmp -131
+acc -9
+acc -12
+acc +31
+jmp -25
+nop -277
+acc +22
+jmp -273
+acc +19
+jmp -244
+acc -8
+nop +220
+acc +48
+jmp -261
+acc +23
+acc +11
+acc -16
+jmp -47
+acc +50
+acc -9
+acc +23
+jmp -38
+jmp +146
+nop -168
+jmp -88
+acc +37
+acc +36
+acc +43
+acc -7
+jmp +147
+jmp +1
+acc +42
+jmp -352
+acc +39
+jmp +76
+acc +47
+jmp +88
+acc -2
+jmp -102
+acc +20
+jmp +144
+acc +47
+acc +25
+jmp -55
+nop -65
+jmp -375
+acc +8
+jmp +161
+acc +46
+acc +5
+acc +16
+jmp +53
+acc +27
+acc +1
+jmp -6
+jmp -207
+acc -6
+acc +27
+nop +126
+jmp -197
+jmp -110
+jmp +123
+acc +13
+acc +31
+nop +22
+acc +41
+jmp -127
+acc -7
+nop -386
+acc +0
+jmp -65
+jmp -306
+acc +44
+acc +19
+acc +42
+acc +29
+jmp +92
+acc +42
+nop -156
+jmp -56
+jmp -346
+nop +95
+acc -6
+acc -19
+jmp -292
+jmp -443
+acc -12
+acc -18
+jmp +102
+nop +35
+acc +44
+acc +27
+nop -122
+jmp +97
+jmp -382
+jmp -85
+acc -9
+nop -324
+jmp -422
+acc -9
+acc +25
+acc +38
+acc -3
+jmp -298
+acc -2
+acc +26
+acc +14
+jmp -252
+acc +4
+jmp +75
+acc +17
+nop -208
+jmp -235
+acc +19
+jmp -322
+acc +14
+acc -3
+jmp +124
+jmp -221
+jmp -9
+acc +0
+acc +45
+acc -3
+jmp -376
+acc +20
+acc -3
+acc +17
+acc +19
+jmp -400
+acc -16
+acc +25
+jmp -37
+jmp -317
+acc +31
+acc +19
+acc +24
+acc +9
+jmp -181
+acc +35
+jmp -488
+acc -13
+acc +26
+acc -2
+jmp -338
+acc -1
+acc +17
+acc +44
+nop -262
+jmp -86
+acc +17
+acc -1
+acc +23
+jmp +79
+acc -5
+acc +18
+jmp +1
+acc +12
+jmp -127
+acc +1
+acc +35
+acc -10
+acc +14
+jmp -352
+acc +39
+nop +67
+jmp -290
+acc -13
+jmp +41
+jmp -150
+jmp -121
+acc +7
+jmp -331
+acc +42
+nop -389
+acc +4
+jmp -7
+acc -17
+acc -8
+acc -4
+jmp -209
+acc +42
+acc +39
+acc +43
+jmp -306
+acc -18
+acc -16
+acc +13
+jmp -414
+acc +3
+jmp -442
+nop +41
+acc -12
+jmp -194
+jmp -503
+acc -18
+acc +35
+acc -4
+acc +18
+jmp -393
+nop -348
+acc -7
+jmp -521
+acc +48
+acc -19
+acc -3
+acc +44
+jmp +2
+jmp -126
+nop -474
+acc -9
+acc -2
+acc +35
+jmp -587
+jmp -328
+acc -14
+nop -468
+acc +39
+jmp -157
+jmp -538
+acc +0
+nop -264
+acc +19
+nop -266
+jmp -91
+acc +20
+acc +14
+jmp -329
+acc -11
+acc +8
+jmp -219
+jmp -320
+acc +10
+acc +49
+nop -603
+acc +49
+jmp -344
+nop -356
+nop -93
+acc +27
+acc +24
+jmp -482
+nop -126
+nop -345
+acc +6
+acc +3
+jmp +1
diff --git a/2020/08/sol1.pl b/2020/08/sol1.pl
@@ -0,0 +1,33 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+open(my $fh, '<', 'input') or die "$!";
+my @lines;
+{
+ local $/;
+ my $content = <$fh>;
+ @lines = split("\n", $content);
+}
+
+my $acc = 0;
+my $ptr = 0;
+my %seen;
+my %C = (
+ acc => sub { $acc += $_[0]; $ptr++ },
+ nop => sub { $ptr++ },
+ jmp => sub { $ptr += $_[0] },
+);
+
+while (1) {
+ if (exists $seen{$ptr}) {
+ print "$acc\n";
+ exit(0);
+ }
+ my ($ins, $val) = split(' ', $lines[$ptr]);
+ # print "$ptr\t$acc\t$lines[$ptr]\n";
+ $seen{$ptr} = 1;
+ $C{$ins}->($val);
+}
+
+# heh infinite loop if we don't find an infinite loop
diff --git a/2020/08/sol2.pl b/2020/08/sol2.pl
@@ -0,0 +1,52 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+open(my $fh, '<', 'input') or die "$!";
+my @lines;
+{
+ local $/;
+ my $content = <$fh>;
+ @lines = split("\n", $content);
+}
+
+my $goal = scalar @lines;
+my $attempts;
+for (my $i = 0; $i < @lines; $i++) {
+ my ($inst, $val) = split(' ', $lines[$i]);
+ if ($inst eq 'nop') {
+ my @game = @lines;
+ $game[$i] = "jmp $val";
+ play_out(@game);
+ } elsif ($inst eq 'jmp') {
+ my @game = @lines;
+ $game[$i] = "nop $val";
+ play_out(@game);
+ }
+}
+
+sub play_out {
+ my (@game) = @_;
+ $attempts++;
+
+ my $acc = 0;
+ my $ptr = 0;
+ my %seen;
+ my %C = (
+ acc => sub { $acc += $_[0]; $ptr++ },
+ nop => sub { $ptr++ },
+ jmp => sub { $ptr += $_[0] },
+ );
+
+ while ($ptr != $goal) {
+ if (exists $seen{$ptr}) {
+ return 0;
+ }
+ my ($ins, $val) = split(' ', $game[$ptr]);
+ # print "$ptr\t$acc\t$lines[$ptr]\n";
+ $seen{$ptr} = 1;
+ $C{$ins}->($val);
+ }
+ print "After $attempts attempts: $acc\n";
+ exit(0);
+}
diff --git a/2020/09/input b/2020/09/input
@@ -0,0 +1,1000 @@
+26
+36
+37
+9
+8
+22
+41
+5
+17
+44
+40
+31
+10
+33
+30
+50
+24
+4
+12
+46
+39
+45
+42
+7
+27
+13
+58
+11
+14
+53
+9
+15
+23
+18
+16
+21
+17
+49
+19
+20
+32
+31
+22
+30
+24
+35
+28
+33
+25
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diff --git a/2020/09/sol1.pl b/2020/09/sol1.pl
@@ -0,0 +1,40 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+my $preamble = 25;
+my $n = 0;
+my @mem;
+while (my $l = <ARGV>) {
+ chomp $l;
+ if ($n < $preamble) {
+ # build memory
+ push (@mem, $l);
+ $n++;
+ } else {
+ # use memory
+ check($l, \@mem);
+ shift(@mem);
+ push(@mem, $l);
+ }
+}
+exit 1;
+
+sub check {
+ my ($l, $memA) = @_;
+
+ # TODO: optimize?
+ my %seen;
+ for my $m (@$memA) {
+ $seen{$m} = 1;
+ my $c = $l - $m;
+ if ($seen{$c} && $c != $m) {
+ # success!
+ return;
+ }
+ }
+
+ # nothing adds up! report & exit
+ print "$l\n";
+ exit 0;
+}
diff --git a/2020/09/sol2.pl b/2020/09/sol2.pl
@@ -0,0 +1,46 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+use List::Util qw(min max);
+
+my $invalid = `./sol1.pl input`; # cheers
+die "$!" if $?;
+
+my @nums;
+{
+ local $/;
+ open(my $fh, '<', 'input') or die "$!";
+ @nums = split("\n", <$fh>);
+}
+
+# IDEA: caterpillar slide
+# - inch front forward until > invalid
+# - inch back forward until < invalid
+# if at any point = invalid, we win
+my $sum = 0;
+my @mem;
+
+print "GOAL: $invalid\n";
+for my $n (@nums) {
+ printf "DBG> n: %d, sum: %d, wind: %d\n", $n, $sum, scalar @mem;
+ if ($sum == $invalid) {
+ my $result = min(@mem) + max(@mem);
+ print "$result\n";
+ exit 0;
+ }
+
+ # move that butt forward until we can add $n without overflowing
+ while (($sum + $n) > $invalid) {
+ $sum -= shift(@mem);
+ if (!@mem) {
+ # impossible, too big
+ exit(1);
+ }
+ }
+ # scooch forward!
+ $sum += $n;
+ push(@mem, $n);
+}
+
+exit 1;
diff --git a/2020/10/input b/2020/10/input
@@ -0,0 +1,100 @@
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+4
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+3
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+132
+87
+55
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+83
+23
+42
+69
+1
+77
+135
+128
+94
diff --git a/2020/10/sol1.pl b/2020/10/sol1.pl
@@ -0,0 +1,27 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+my @adapters;
+while (<ARGV>) {
+ chomp;
+ push(@adapters, $_);
+}
+
+@adapters = sort { $a <=> $b } @adapters;
+
+my %spread;
+my $last = 0;
+for my $n (@adapters) {
+ my $delta = $n - $last;
+ if ($delta > 3) {
+ die "assert -- greater than 3 diff\n";
+ }
+ $spread{$delta}++;
+ $last = $n;
+}
+
+$spread{3}++; # for the device
+
+my $result = $spread{1} * $spread{3};
+print "$result\n";
diff --git a/2020/10/sol2.pl b/2020/10/sol2.pl
@@ -0,0 +1,36 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+my @adapters;
+while (<ARGV>) {
+ chomp;
+ push(@adapters, $_);
+}
+
+# reverse!
+@adapters = sort { $b <=> $a } (@adapters, 0);
+
+# Consider 1 2 3 4 5 6
+# set n(9) = 1
+# 6 -> n(9) # 1
+# 5 -> n(6) # 1
+# 4 -> n(5) + n(6) # 2
+# 3 -> n(4) + n(5) + n(6) # 4
+# 2 -> n(3) + n(4) + n(5) # 7
+# 1 -> n(2) + n(3) + n(4) # 13
+
+my %H;
+$H{$adapters[0] + 3} = 1; # device
+while (@adapters) {
+ my $n = shift(@adapters);
+ # how many things can you get to?
+ my $total;
+ for (my $i = $n + 1; $i <= $n + 3; $i++) {
+ if (exists($H{$i})) {
+ $total += $H{$i};
+ }
+ }
+ $H{$n} = $total;
+}
+print "$H{0}\n";
diff --git a/2020/11/input b/2020/11/input
@@ -0,0 +1,99 @@
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diff --git a/2020/11/sol1.pl b/2020/11/sol1.pl
@@ -0,0 +1,71 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+use Storable qw(dclone);
+
+# Read in the grid
+# TRICK: to make neighbors easier, pad by '.' on all ends
+my @G;
+my $i = 0;
+while (<ARGV>) {
+ chomp;
+ $G[$i] = ['.', split('', $_), '.'];
+ $i++;
+}
+push(@G, [('.') x scalar @{$G[0]}]);
+unshift(@G, [('.') x scalar @{$G[0]}]);
+
+$i = 0;
+while (evolve(\@G)) {
+ print "Evolving ... $i\n";
+ $i++;
+}
+
+my $total = 0;
+for my $r (@G) {
+ $total += scalar grep { $_ eq '#' } @$r;
+}
+print "$total\n";
+
+sub evolve {
+ my ($G) = @_;
+ # 1. deep clone
+ # 2. for loop over grid, change (mark did_change)
+ # 3. return did_change
+ my $orig = dclone($G);
+ my $did_change;
+
+ my $R = scalar @$orig;
+ my $C = scalar @{$orig->[0]};
+ for (my $i = 1; $i < $R - 1; $i++) {
+ for (my $j = 1; $j < $C - 1; $j++) {
+ my $seat = $orig->[$i]->[$j];
+ next if $seat eq '.'; # floor don't change
+
+ # neighbors...
+ my @neighs = map { $orig->[$_->[0]]->[$_->[1]] } (
+ [$i - 1, $j - 1],
+ [$i - 1, $j],
+ [$i - 1, $j + 1],
+ [$i, $j - 1],
+ #[$i, $j], <-- don't include self
+ [$i, $j + 1],
+ [$i + 1, $j - 1],
+ [$i + 1, $j],
+ [$i + 1, $j + 1],
+ );
+ my $num_occ = scalar grep { $_ eq '#' } @neighs;
+
+ if ($seat eq 'L' && $num_occ == 0) {
+ $G->[$i]->[$j] = '#';
+ $did_change = 1;
+ } elsif ($seat eq '#' && $num_occ >= 4) {
+ $G->[$i]->[$j] = 'L';
+ $did_change = 1;
+ }
+ }
+ }
+
+ return $did_change;;
+}
diff --git a/2020/11/sol2.pl b/2020/11/sol2.pl
@@ -0,0 +1,99 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+use Storable qw(dclone);
+
+# Read in the grid
+my @G;
+my $i = 0;
+while (<ARGV>) {
+ chomp;
+ $G[$i] = [split('', $_)];
+ $i++;
+}
+
+$i = 0;
+while (evolve(\@G)) {
+ print "Evolving ... $i\n";
+ $i++;
+}
+
+my $total = 0;
+for my $r (@G) {
+ $total += scalar grep { $_ eq '#' } @$r;
+}
+print "$total\n";
+
+# TRICK! because floor is static, the neighbors NEVER CHANGE
+# so we can pay the cost of finding them once, and then never
+# again :)
+my %neigh_cache;
+sub neigh {
+ my ($i, $j, $G) = @_;
+ my $key = "$i,$j";
+ if (exists $neigh_cache{$key}) {
+ return @{$neigh_cache{$key}};
+ }
+
+ # Not in cache, compute
+ my $R = scalar @$G;
+ my $C = scalar @{$G->[0]};
+ my $finder = sub {
+ my ($updater) = @_;
+ my ($si, $sj) = $updater->($i, $j);
+ while ($si >= 0 && $si < $R && $sj >= 0 && $sj < $C) {
+ if ($G->[$si]->[$sj] ne '.') {
+ return [$si, $sj];
+ }
+ ($si, $sj) = $updater->($si, $sj);
+ }
+ return;
+ };
+
+ my @neighs = grep { defined($_) } (
+ $finder->(sub { return $_[0] + 1, $_[1] }),
+ $finder->(sub { return $_[0] - 1, $_[1] }),
+ $finder->(sub { return $_[0] + 1, $_[1] + 1 }),
+ $finder->(sub { return $_[0] + 1, $_[1] - 1 }),
+ $finder->(sub { return $_[0] - 1, $_[1] + 1 }),
+ $finder->(sub { return $_[0] - 1, $_[1] - 1 }),
+ $finder->(sub { return $_[0], $_[1] + 1 }),
+ $finder->(sub { return $_[0], $_[1] - 1 }),
+ );
+ $neigh_cache{$key} = \@neighs;
+ return @neighs;
+}
+
+sub evolve {
+ my ($G) = @_;
+ # 1. deep clone
+ # 2. for loop over grid, change (mark did_change)
+ # 3. return did_change
+ my $orig = dclone($G);
+ my $did_change;
+
+ my $R = scalar @$orig;
+ my $C = scalar @{$orig->[0]};
+ for (my $i = 0; $i < $R; $i++) {
+ for (my $j = 0; $j < $C; $j++) {
+ my $seat = $orig->[$i]->[$j];
+ next if $seat eq '.'; # floor don't change
+
+ # neighbors...
+ my @coords = neigh($i, $j, $orig);
+ my @neighs = map { $orig->[$_->[0]]->[$_->[1]] } @coords;
+ my $num_occ = scalar grep { $_ eq '#' } @neighs;
+
+ if ($seat eq 'L' && $num_occ == 0) {
+ $G->[$i]->[$j] = '#';
+ $did_change = 1;
+ } elsif ($seat eq '#' && $num_occ >= 5) {
+ $G->[$i]->[$j] = 'L';
+ $did_change = 1;
+ }
+ }
+ }
+
+ return $did_change;;
+}
diff --git a/README.md b/README.md
@@ -1,4 +1,8 @@
# Advent of Code
+Historically, I do the first 10d of so in a language that I'd like to learn /
+practice!
+
+* [2020](./2020): All Perl
* [2021](./2021): Mostly Python, some C
* [2022](./2022): Attempting CHICKEN Scheme
