37 files changed, 9176 insertions, 0 deletions

diff --git a/2020/day1/README.md b/2020/day1/README.md
new file mode 100644
index 0000000..f8ae070
--- /dev/null
+++ b/2020/day1/README.md
@@ -0,0 +1,13 @@
+# Day 1
+
+## First Part
+
+Simple two sum problem
+
+    perl sumto.pl
+
+## Second part
+
+[Three sum problem](https://www.callicoder.com/three-sum-problem/), which is like two sum problem after fixing the first index
+
+    perl threesum.pl
diff --git a/2020/day1/input b/2020/day1/input
new file mode 100644
index 0000000..b221b17
--- /dev/null
+++ b/2020/day1/input
@@ -0,0 +1,200 @@
+997
+1582
+1790
+1798
+1094
+1831
+1879
+1730
+1995
+1702
+1680
+1869
+1964
+1777
+1862
+1928
+1997
+1741
+1604
+1691
+1219
+1458
+1749
+1717
+1786
+1665
+1724
+1998
+1589
+1828
+1953
+1848
+1500
+1590
+1968
+1948
+1323
+1800
+1986
+679
+1907
+1916
+1820
+1661
+1479
+1808
+1824
+1825
+1952
+1666
+1541
+1791
+1906
+1638
+1557
+1999
+1710
+1549
+1912
+1974
+1628
+1748
+1411
+1978
+1865
+1932
+1839
+1892
+1981
+1807
+357
+912
+1443
+1972
+1816
+1890
+1029
+1175
+1522
+1750
+2001
+1655
+1955
+1949
+1660
+233
+1891
+1994
+1934
+1908
+1573
+1712
+1622
+1770
+1574
+1778
+1851
+2004
+1818
+1200
+1229
+1110
+1005
+1716
+1765
+1835
+1773
+15
+1914
+1833
+1689
+1843
+1718
+1872
+390
+1941
+1178
+1670
+1899
+1864
+1913
+2010
+1855
+1797
+1767
+1673
+1657
+1607
+1305
+1341
+1662
+1845
+1980
+1534
+1789
+1876
+1849
+1926
+1958
+977
+1709
+1647
+1832
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+1854
+1667
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+1970
+1186
+2000
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+1614
+1988
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+1636
+1327
+1696
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+1045
+1829
+1079
+1295
+1213
+1714
+1992
+1984
+1951
+1687
+1842
+1792
+87
+1732
+428
+1799
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+1962
+1629
+1965
+1142
+1040
+131
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+1454
+1779
+1369
+1960
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+1725
+1893
+1465
+1676
+1826
+1462
+1408
+1937
+1643
+1069
+1759
diff --git a/2020/day1/sumto.pl b/2020/day1/sumto.pl
new file mode 100644
index 0000000..931f5e2
--- /dev/null
+++ b/2020/day1/sumto.pl
@@ -0,0 +1,28 @@
+use strict;
+use warnings;
+use DDP;
+use Smart::Comments;
+
+open my $fh, '<', "input" or die "no input present, $!";
+chomp(my @nums = <$fh>);
+close $fh;
+
+@nums = sort { $a <=> $b } @nums;
+
+my $l_idx = 0;
+my $r_idx = $#nums;
+
+my $total = $nums[$l_idx] + $nums[$r_idx];
+
+while ($total != 2020) {
+
+    if ($total < 2020) {
+        $l_idx++; # total too low, increase
+    } else {
+        $r_idx--; # total too high, decrease
+    }
+
+    $total = $nums[$l_idx] + $nums[$r_idx];
+}
+
+print $nums[$l_idx] * $nums[$r_idx];
diff --git a/2020/day1/threesum.pl b/2020/day1/threesum.pl
new file mode 100644
index 0000000..8f2083a
--- /dev/null
+++ b/2020/day1/threesum.pl
@@ -0,0 +1,44 @@
+use strict;
+use warnings;
+use DDP;
+# use Smart::Comments;
+
+open my $fh, '<', "input" or die "no input present, $!";
+chomp(my @nums = <$fh>);
+close $fh;
+
+@nums = sort { $a <=> $b } @nums;
+
+# fix one index, solve two sum problem
+my $fixed_idx = 0;
+my $l_idx = 1;
+my $r_idx = $#nums;
+
+my $total = $nums[$fixed_idx] + $nums[$l_idx] + $nums[$r_idx];
+
+while ($total != 2020) {
+
+    if ($total < 2020) {
+        $l_idx++; # total too low, increase
+    } else {
+        $r_idx--; # total too high, decrease
+    }
+
+    # fixed index might not be correct
+    if ($l_idx > $r_idx) {
+        $fixed_idx++;
+        $l_idx = $fixed_idx + 1;
+        $r_idx = $#nums;
+    }
+
+    $total = $nums[$fixed_idx] + $nums[$l_idx] + $nums[$r_idx];
+    ### $total
+
+    ### $fixed_idx
+    ### $l_idx
+    ### $r_idx
+
+    # print("fixed: $nums[$fixed_idx]\nleft: $nums[$l_idx]\nright: $nums[$r_idx]\n");
+}
+
+print $nums[$fixed_idx] * $nums[$l_idx] * $nums[$r_idx];
diff --git a/2020/day10/input b/2020/day10/input
new file mode 100644
index 0000000..8d69912
--- /dev/null
+++ b/2020/day10/input
@@ -0,0 +1,94 @@
+26
+97
+31
+7
+2
+10
+46
+38
+112
+54
+30
+93
+18
+111
+29
+75
+139
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+99
+8
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+57
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+13
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+20
+68
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+127
+105
+114
+138
+126
+67
+32
+145
+115
+16
+141
+1
+73
+45
+119
+51
+40
+35
+150
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+53
+80
+79
+65
+135
+74
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+128
+64
+17
+4
+84
+83
+147
+142
+146
+9
+125
+94
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+134
+92
+66
+122
+19
+86
+50
+52
+108
+100
+71
+61
+44
+39
+3
+72
diff --git a/2020/day10/joltage.pl b/2020/day10/joltage.pl
new file mode 100644
index 0000000..3a22057
--- /dev/null
+++ b/2020/day10/joltage.pl
@@ -0,0 +1,29 @@
+use strict;
+use warnings;
+use DDP;
+use Smart::Comments;
+use List::Util qw(sum min);
+
+my @jolts = sort { $a <=> $b } map { int } <>;
+
+@jolts = (0, @jolts, $jolts[-1] + 3);
+
+my %diffs;
+
+my $curr = 0;
+
+foreach my $joltage (@jolts) {
+    $diffs{$joltage - $curr}++;
+    $curr = $joltage;
+}
+
+p %diffs;
+
+print($diffs{1} * $diffs{3});
+
+my @memoi = (1);
+for my $k (1..$#jolts) {
+    push @memoi, sum map {$memoi[$k-$_]} grep {$jolts[$k-$_]+3 >= $jolts[$k]} 1..min($k,3);
+}
+
+print "\n$memoi[-1]"
diff --git a/2020/day2/input b/2020/day2/input
new file mode 100644
index 0000000..8903fa4
--- /dev/null
+++ b/2020/day2/input
@@ -0,0 +1,1000 @@
+13-16 k: kkkkkgmkbvkkrskhd
+5-6 p: qpppvzp
+3-4 p: psppxhlfpvkh
+3-10 w: wwwwwwwwwwdwww
+4-5 r: rcgrrcr
+3-4 c: clvccc
+1-5 x: xfsfxmctb
+9-14 k: kpkmkkckhkkkkvkk
+5-6 s: gsfsss
+4-8 c: cccdcqdcr
+2-5 k: kmkpkkfgkkkkdkkk
+9-11 f: pfnsfffwxsn
+8-9 w: wjwnwcwxc
+7-8 q: rrxhplqs
+5-10 n: gpnkqnxnbjzgjnb
+18-19 p: fvpkgfkfjgwllqwhrjd
+12-13 v: kvvvbmdvvvvvvcvvvv
+3-5 m: mdmkmvhszpjcxl
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+1-4 b: bbbbbbbb
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+2-10 d: fhdwdbdddrsldrtdjdr
+1-7 z: ztszzfzztcqzrz
+4-6 j: mmjjjrj
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+5-7 w: wnzbwgw
+15-17 f: fcffffffffffffffpf
+1-2 t: tttft
+1-7 n: zctqhnxvbn
+3-8 z: hdpqzzzlzsw
+3-15 l: llslllllllllllml
+8-19 w: rwtbwrwjwtwxcclthdw
+4-5 g: zggggg
+5-14 v: vvvvhvvvvvvvmlvv
+1-7 l: mlgxllpgl
+2-12 b: mvwbfjcddqjb
+1-3 m: qmzm
+2-3 r: rrrrrffr
+1-7 x: xxsgxxv
+8-10 d: tdrrqdzcdddddxddl
+2-4 n: crnnfdcnnnzn
+3-4 n: nnnz
+9-10 z: zzzzqfzzzzz
+10-16 n: nnnhmnnznsnntnnc
+9-16 s: vssssbsscssssssjss
+9-13 w: wwkwwwqqwvwwww
+4-5 d: hkdhwddtdkqwvl
+3-4 l: llll
+4-5 f: ffzffftld
+7-9 d: ddddddddgd
+6-7 t: ttthptttqxlfddstsq
+5-16 c: clhwccvlnmttjqcc
+4-5 k: pkkkk
+7-11 m: xwmmmmchmmt
+16-17 n: nnnnnnnnnnhnnnnrm
+5-8 b: bbbbbbbbb
+1-4 s: jsss
+3-4 h: rhhhtjwfvdhz
+9-10 r: rrrprlrwrrw
+1-6 n: nnnnnkn
+18-19 p: ppppppppppppppppppp
+4-5 l: ljlrcl
+3-7 m: mmmmmjmdmtm
+12-13 b: bbbbbbbbbbbvf
+6-11 g: hcghdwfpcqk
+4-6 q: krpfvw
+10-13 j: jsjkvjjjjjzjjfj
+5-6 n: lcnnnnzndqkfnsq
+2-4 j: nvdj
+2-5 p: hppnpmpq
+2-4 w: wnwbw
+2-7 f: fwfxfmfszmcxf
+6-8 d: dqrdbsnjds
+1-3 f: ffffffmff
+5-8 s: lnbwqnkxws
+10-12 n: nnnnnnjnnnnnjcn
+9-12 c: pccvnbccxrncrcclccc
+14-18 s: ssssssssslsssstsssss
+3-6 l: lldllczl
+6-11 g: gggggwgggghg
+11-12 h: chhhmjhzhqfh
+5-6 n: qhnvcw
+6-7 k: nckkkkmnkkkzkkk
+6-8 d: wddgbdpdzdqxrwddjlz
+1-3 h: qghp
+3-5 j: mnjjjxjkgnrdzjbtdr
+1-9 g: gfgcgggxgjggggggf
+8-20 b: vptprmjbwwtnbhwjtnjb
+7-8 j: jjjjjjjj
+3-4 t: tqtt
+5-10 f: fffzbxxszjjvjfhn
+3-4 t: tttttttbtt
+4-7 p: wjrgpnj
+1-9 g: pgzllxgfg
+14-15 c: cccccccccccccqm
+11-12 b: btmcbzbnzcbbxr
+5-6 h: hhhhhhh
+1-6 s: nssmsssss
+11-12 d: ddddddbddthfdddd
+11-13 j: jtjjjjjjpjjjjwfjj
+2-4 j: gjjj
+3-9 v: vvgvvvvvrv
+1-2 l: tqjjljxcsl
+5-6 q: nqqqqr
+12-16 h: hkhhhhhjhhhhqxhhhhhh
+2-6 p: lpppkpbpzg
+2-7 v: vzvvvvfv
+13-16 g: ggggggggggggwggb
+3-14 j: ghsjjcgmkwsdchlslpf
+1-3 s: ssplw
+7-8 x: xxxnxxxxxxx
+3-4 h: zghhvtwtmlplvxxhsbf
+4-5 g: sqgsnf
+14-17 z: zzzzzzzzzzzzzwczc
+1-2 z: cpzzzzk
+16-17 s: ssssssssssfsqssss
+3-9 j: jvjjfjdjjjjjh
+1-6 v: vtvrvvj
+4-8 c: clzcccccccf
+4-5 d: dwldw
+2-4 l: lwlrllllllll
+6-11 s: zxgcsdxkrcns
+14-17 r: vrhvhrprrfrsrrrrr
+3-6 p: mrcztppnl
+4-6 w: wwwwwwwwww
+1-6 w: zwjccrqpwmnthz
+2-7 t: mnjntdcq
+1-5 b: bbjbbbbb
+10-11 w: wwwwwtwwwwww
+4-6 d: dddxdfd
+2-4 f: fjfff
+13-15 b: vbbbbbbbbbbbbbb
+8-9 n: ncbnnnnnn
+2-6 d: hdfphnnmbbdt
+1-4 f: wffz
+7-15 f: ffsffffffffffvzff
+8-10 c: zchrckkcqcr
+2-6 h: thvbvh
diff --git a/2020/day2/pwcountcheck.pl b/2020/day2/pwcountcheck.pl
new file mode 100644
index 0000000..636a5d0
--- /dev/null
+++ b/2020/day2/pwcountcheck.pl
@@ -0,0 +1,22 @@
+use strict;
+use warnings;
+
+open my $fh, '<', "input" or die "no input present, $!";
+
+my $valid = 0;
+
+while (my $line = <$fh>) {
+    chomp $line;
+    if ($line =~ m/(?'first'\d+)-(?'second'\d+) (?'char'\w): (?'rest'\w+)/) {
+
+        my $first = $+{first};
+        my $second = $+{second};
+
+        # https://www.effectiveperlprogramming.com/2010/12/count-the-number-of-things-in-a-string/
+        my $count = () = $+{rest} =~ /$+{char}/g;
+
+        $valid++ if $count >= $first and $count <= $second;
+    }
+}
+
+print("$valid");
diff --git a/2020/day2/pwindexcheck.pl b/2020/day2/pwindexcheck.pl
new file mode 100644
index 0000000..69a26b5
--- /dev/null
+++ b/2020/day2/pwindexcheck.pl
@@ -0,0 +1,19 @@
+use strict;
+use warnings;
+
+open my $fh, '<', "input" or die "no input present, $!";
+
+my $valid = 0;
+
+while (my $line = <$fh>) {
+    chomp $line;
+    if ($line =~ m/(?<idx_1>\d+)-(?<idx_2>\d+) (?<char>\w): (?<rest>\w+)/) {
+
+        my $first = substr( $+{rest}, $+{idx_1} - 1 , 1 );
+        my $second = substr( $+{rest}, $+{idx_2} - 1 , 1 );
+
+        $valid++ if $first eq $+{char} xor $second eq $+{char};
+    }
+}
+
+print("$valid");
diff --git a/2020/day3/README.md b/2020/day3/README.md
new file mode 100644
index 0000000..75737af
--- /dev/null
+++ b/2020/day3/README.md
@@ -0,0 +1,11 @@
+# day 3
+
+## first part
+
+32 places per row, right 3 and down 1 is
+
+```
+idx = (idx + 3) % 32
+```
+
+per line but this will _probably_ change for the part 2.
diff --git a/2020/day3/input b/2020/day3/input
new file mode 100644
index 0000000..831458f
--- /dev/null
+++ b/2020/day3/input
@@ -0,0 +1,323 @@
+.....#.........#...#..##....#..
+.#........#...#........#.......
+......#......#..#...#....#.#..#
+...#.#####.#.......##.#........
+...........#......#..#.....#...
+#.#..#...#.#...#.##.....#.....#
+....#..#....#...#.#...#.##.....
+##...#..........##..######.....
+.....#...#......#.............#
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+#..........#.#.#..............#
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+.....#...#..#..#...##.#.......#
+.##.#...............#.#...#....
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+...........#.#...#.....#....#.#
+.###.#........##....#.##...#...
+#....#.##....#.###..##.#.......
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+....#.##...#...#.....#.#..#....
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+.##.....#.#.....##.#.......#.#.
+.#..#....#.#.....#.##.#....#..#
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+.#........#...#..#.#...#....#..
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+.#......#.##.#............##.#.
+.#....#.....##..##..........#..
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+.#.#.##...#..#...........#....#
+....#......#.......##...#.#.#..
+.......#..#...##..#.........#..
+....#..#.#.......##........#..#
+........#.#....#.##..#.......#.
+.....#.......#.#...#.#.........
+........#...#....#.#....###..#.
+......#..#.##..##..#...#.#.....
+.#.#.....#.....#....#...#...#..
+...#..#...#..#......#..#.#.....
+...##...#...........#..#......#
+..#...#####..#.#.##....##......
+...........#......#.#..#.......
+..#....##..#.##.......#.#.#..#.
+..#..#........#...#.......#....
diff --git a/2020/day3/toboggan.pl b/2020/day3/toboggan.pl
new file mode 100644
index 0000000..d424a83
--- /dev/null
+++ b/2020/day3/toboggan.pl
@@ -0,0 +1,30 @@
+use strict;
+use warnings;
+# use Smart::Comments;
+
+open my $fh, '<', "input" or die "no input present, $!";
+
+my $right_m = 3;
+my $toboggan = 0;
+
+my $trees = 0;
+
+while (my $line = <$fh>) {
+    chomp $line;
+
+    ### $line
+    my $curr = substr($line, $toboggan, 1);
+    ### $curr
+
+    if ($curr eq "#") {
+        $trees++;
+    }
+
+    ### $toboggan
+
+    $toboggan = ($toboggan + $right_m) % 31;
+
+}
+
+print($trees);
+
diff --git a/2020/day3/toboggans.pl b/2020/day3/toboggans.pl
new file mode 100644
index 0000000..ebf7ae4
--- /dev/null
+++ b/2020/day3/toboggans.pl
@@ -0,0 +1,40 @@
+use strict;
+use warnings;
+# use Smart::Comments;
+use DDP;
+
+open my $fh, '<', "input" or die "no input present, $!";
+chomp(my @forest = <$fh>);
+close $fh;
+my $len = scalar @forest;
+
+my @right_ms = qw/1 3 5 7 1/;
+my @down_ms = qw/ 1 1 1 1 2/;
+my $runs = $#right_ms;
+
+my $all_trees = 1;
+
+foreach my $run (0..$runs) {
+
+    my $toboggan = 0;
+    my $trees = 0;
+    my $down_mov = $down_ms[$run];
+    my $right_mov = $right_ms[$run];
+
+    for (my $line = 0; $line < $len; $line += $down_mov) {
+        my $curr = substr($forest[$line], $toboggan, 1);
+        if ($curr eq "#") {
+            $trees++;
+        }
+        $toboggan = ($toboggan + $right_mov) % 31;
+    }
+    $trees ||= 1;
+    $all_trees *= $trees;
+    ### this run is
+    ### $right_mov
+    ### $down_mov
+    ### got: $trees
+    ### so far: $all_trees
+}
+
+print("$all_trees");
diff --git a/2020/day4/input b/2020/day4/input
new file mode 100644
index 0000000..734e50b
--- /dev/null
+++ b/2020/day4/input
@@ -0,0 +1,1000 @@
+pid:827837505 byr:1976
+hgt:187cm
+iyr:2016
+hcl:#fffffd
+eyr:2024
+
+hgt:189cm byr:1987 pid:572028668 iyr:2014 hcl:#623a2f
+eyr:2028 ecl:amb
+
+pid:#e9bf38 hcl:z iyr:2029 byr:2028 ecl:#18f71a hgt:174in eyr:2036
+
+hcl:#cfa07d byr:1982 pid:573165334 ecl:gry eyr:2022 iyr:2012 hgt:180cm
+
+cid:151 hcl:#c0946f
+ecl:brn hgt:66cm iyr:2013 pid:694421369
+byr:1980 eyr:2029
+
+ecl:brn
+pid:9337568136 eyr:2026
+hcl:#6b5442
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+
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+pid:386128445 iyr:2020 byr:1971 eyr:2021 ecl:gry
+
+hgt:183cm hcl:#733820 iyr:2015
+ecl:blu pid:216205626 eyr:2022 byr:1941
+
+cid:150 ecl:amb pid:872515243 byr:1926
+eyr:1996
+hcl:#dedc39 hgt:67in iyr:2020
+
+byr:1927 ecl:brn cid:153 iyr:2011
+pid:165190810 hcl:#fffffd
+eyr:2028 hgt:64in
+
+pid:502603734
+byr:1966 iyr:2015 hgt:176cm cid:205 ecl:brn hcl:#fffffd eyr:2021
+
+hcl:#18171d hgt:158cm byr:1943 iyr:2019
+pid:058840094
+eyr:2023
+
+byr:1962 hcl:#b6652a ecl:grn
+cid:297
+iyr:2010 pid:990422650
+hgt:154cm eyr:2020
+
+eyr:1934 iyr:2011
+ecl:gry
+hcl:z byr:2004 hgt:63cm pid:6173356201
+
+pid:329432364 eyr:2029
+ecl:grn hcl:#18171d iyr:2013
+hgt:158cm byr:1960
+
+hcl:#efcc98 iyr:2016 hgt:186cm cid:215
+pid:852781253 eyr:2027 ecl:blu byr:1937
+
+hcl:#623a2f ecl:gry iyr:2020 byr:1972 hgt:182cm pid:073426952 eyr:2027
+
+hcl:#3317b9 byr:1950 pid:304511418 hgt:177cm cid:124 eyr:2020 ecl:hzl iyr:2014
+
+eyr:2029
+pid:034754507 byr:1936
+cid:265 ecl:#b50997 hgt:183cm
+hcl:#623a2f iyr:1924
+
+eyr:2024 byr:1927 cid:243 ecl:gry hcl:#6b5442 pid:714355627 hgt:160cm
+iyr:2016
+
+hgt:152cm
+ecl:gry hcl:#a97842
+eyr:2029 byr:1952
+pid:555308923 iyr:2010
+
+byr:2008
+pid:19681314 hgt:180in iyr:2030 ecl:gry cid:272
+eyr:2023
+hcl:#b6652a
+
+cid:234
+iyr:2014 byr:1940 ecl:hzl pid:042231105 hcl:#3bf69c hgt:172cm eyr:2029
+
+hcl:#efcc98 pid:831567586 hgt:190cm iyr:2017
+byr:1966 eyr:2024 ecl:blu
+
+hcl:#341e13 ecl:blu
+eyr:2022 cid:161 pid:197839646 iyr:2014
+
+hcl:#cfa07d
+byr:1957
+iyr:2019 hgt:181cm
+pid:543775141 ecl:oth eyr:2021
+
+hcl:z
+pid:#596c41 eyr:2035
+byr:2008 iyr:1975
+ecl:#c66ee6
+hgt:150in
+
+ecl:grn
+hcl:#7d3b0c iyr:2016
+pid:804255369 eyr:2028 byr:1983 hgt:69in cid:82
+
+eyr:2022
+iyr:2013 hgt:191cm ecl:gry
+hcl:#a97842 pid:186827268 byr:1969
+
+pid:871672398 eyr:2026 byr:1946 ecl:oth
+iyr:2015
+hcl:#866857 hgt:185cm
+
+byr:1973
+hgt:150cm
+pid:905076707
+iyr:2017
+hcl:#2edf01 ecl:oth cid:221 eyr:2026
+
+eyr:2024 ecl:grn pid:955444191 hcl:z iyr:2015 byr:2008 hgt:151cm
+
+byr:1958 hcl:#fffffd pid:218986541 cid:203 ecl:brn hgt:154cm
+iyr:2014
+eyr:2026
+
+hcl:#623a2f byr:1964 ecl:oth iyr:2010 pid:525843363 hgt:164cm eyr:2025
+
+ecl:blu iyr:2013 hgt:193cm byr:1990 pid:612387132 hcl:#18171d cid:280 eyr:2028
+
+ecl:oth eyr:2022
+pid:110447037 hgt:187cm byr:1967 hcl:#efcc98
+
+byr:1930
+eyr:2026 hgt:159cm
+iyr:2011
+ecl:hzl hcl:#6b5442 pid:923471212
+
+cid:350
+eyr:2029 pid:823592758 iyr:2018
+ecl:grn byr:1972 hgt:167cm hcl:#18171d
+
+cid:76 eyr:2027 hcl:#6b5442 pid:099579798 byr:1930
+iyr:2020
+ecl:gry hgt:153cm
+
+byr:1957 ecl:brn
+hcl:z iyr:2016 pid:352677969 hgt:189cm
+eyr:2029
+
+cid:143 eyr:2035 pid:602952079
+ecl:#9b73f0 hcl:#602927
+iyr:2022 byr:1975
+hgt:174cm
+
+byr:1971 pid:741305897 hgt:192cm
+ecl:amb hcl:#888785 eyr:2028 iyr:2011
+
+ecl:oth iyr:2016
+byr:1942 hgt:189cm hcl:#888785 eyr:2024 pid:054290182
+
+hcl:#a97842
+byr:1945
+ecl:amb pid:370849304
+eyr:2028
+iyr:2016 hgt:168cm
+
+hgt:154cm iyr:2015 eyr:2030 byr:1952 ecl:hzl hcl:#341e13 pid:996518075
+
+byr:1941 ecl:amb iyr:2014
+hcl:#fffffd pid:560990286 eyr:2022 hgt:173cm
+
+ecl:blu byr:1974
+hgt:150cm hcl:#ceb3a1 eyr:2020 iyr:2013
+pid:827415351
+
+hcl:#623a2f eyr:2027 iyr:2011 pid:913199234 ecl:oth
+byr:1990 hgt:178cm
+
+ecl:blu byr:1989 hcl:#b6652a
+eyr:2026 pid:724881482 hgt:185cm iyr:2014
+
+cid:115 pid:255002731 eyr:2025 ecl:amb
+byr:1934 iyr:2020 hcl:#7d3b0c
+
+hgt:150cm byr:1969 ecl:blu iyr:2023
+hcl:#866857 pid:754288625 eyr:2029
+
+iyr:2011 hcl:#7d3b0c ecl:hzl
+byr:1930
+hgt:188cm
+eyr:2023
+pid:256556076 cid:136
+
+iyr:2025 byr:1978
+ecl:#fe30a9 hcl:#efcc98 eyr:2029
+pid:392032459 hgt:178cm
+
+eyr:2027 iyr:2017 hgt:160in
+byr:1990 pid:131099122 hcl:#623a2f ecl:amb
+
+ecl:grn
+byr:1978
+eyr:2029 hcl:#18171d
+hgt:165cm pid:172369888
+cid:93
+iyr:2011
+
+ecl:hzl
+hcl:#733820 iyr:2010 eyr:2029 pid:127253449
+hgt:156cm
+byr:1963
+
+hcl:#6c8530
+iyr:2020
+byr:1929 eyr:2021 hgt:177cm ecl:oth pid:347925482
+
+eyr:2037 iyr:2026
+pid:163cm
+hgt:174in byr:2007 hcl:c1305f cid:134
+ecl:#0cf85c
+
+iyr:2011 pid:033811215
+hcl:#a97842 byr:2002 eyr:2021 hgt:186cm
+ecl:brn
+
+hcl:#a97842
+iyr:2020 eyr:2029 byr:1972 pid:535511110 hgt:160cm ecl:oth
+
+ecl:grn cid:89 hgt:193cm pid:73793987 iyr:2021 eyr:2027 byr:1939 hcl:z
+
+hcl:#623a2f
+hgt:182cm cid:154
+pid:873863966 iyr:2018 byr:1999 ecl:brn eyr:2031
+
+iyr:2014 eyr:2029
+cid:71 hcl:#fffffd byr:1924 hgt:63in
+ecl:gry pid:897972798
+
+hgt:76cm
+hcl:z eyr:1955
+iyr:2012 byr:2001 pid:9425090 ecl:hzl
+
+eyr:2021
+pid:501861442
+ecl:grn hcl:#d71ae9
+byr:1977
+hgt:167cm iyr:2015
+
+iyr:2014
+hgt:170cm ecl:gry byr:1928 cid:314 hcl:#602927 eyr:2029
+pid:836710987
+
+eyr:2027 hcl:#efcc98 ecl:amb iyr:2016 byr:1995 pid:603705616 hgt:179cm
+
+eyr:2030 hcl:#602927 cid:105 byr:1943 ecl:hzl
+pid:381601507
+hgt:188cm iyr:2020
+
+iyr:2011
+byr:1993 hcl:#c0946f pid:292649640 hgt:139 ecl:hzl cid:268
+eyr:1999
+
+cid:339 byr:1928
+ecl:brn eyr:2022 hcl:#733820 hgt:191cm pid:282733347 iyr:2019
+
+hgt:176cm
+byr:1935 ecl:brn cid:252 eyr:2023 pid:105060622 iyr:2020 hcl:#18171d
+
+ecl:hzl eyr:2029
+hgt:193cm pid:770254253
+hcl:#efcc98 iyr:2020 byr:1926
+
+pid:977785261 eyr:2022 iyr:2015 byr:1978
+hcl:#733820 hgt:172cm
+ecl:brn
+
+byr:2021
+hgt:160in
+ecl:gmt
+eyr:2032 cid:345 pid:179cm
+hcl:8f5c13 iyr:2029
+
+iyr:2018 hgt:182cm ecl:gry
+pid:897076789 eyr:2023 hcl:#866857
+byr:1980
+
+hgt:88 eyr:2039 cid:99 byr:2007 hcl:a1bb42 ecl:#a2f6bb
+pid:2264966188
+iyr:2022
+
+iyr:2012 cid:59 ecl:gry eyr:2021
+byr:1931
+hgt:172cm hcl:#7d3b0c pid:862416147
+
+byr:1962 eyr:2025
+ecl:grn
+hcl:#866857 hgt:180cm iyr:2014 pid:313647071
+
+eyr:2030 hgt:157cm byr:1985
+iyr:2020
+hcl:#7d3b0c pid:911544768
+ecl:grn
+
+hgt:175cm
+byr:1938
+iyr:2020 ecl:amb hcl:#602927 eyr:2026 pid:144411560
+
+iyr:2019 ecl:amb hcl:#888785 eyr:2025 hgt:187cm
+pid:942054361 byr:1939
+
+cid:168 pid:722146139 byr:1952 ecl:grn
+iyr:2014 hgt:97
+hcl:z
+eyr:2023
+
+eyr:2024 pid:567528498 ecl:gry iyr:2012 byr:1990
+hcl:#733820 hgt:193cm
+cid:293
+
+hcl:#bc352c pid:321838059 byr:1930 hgt:178cm cid:213 eyr:2023 ecl:amb
+iyr:2017
+
+hgt:173cm byr:1925 pid:070222017 iyr:2013 hcl:#ceb3a1 ecl:gry eyr:2024
+
diff --git a/2020/day4/passport.pl b/2020/day4/passport.pl
new file mode 100644
index 0000000..26c6e32
--- /dev/null
+++ b/2020/day4/passport.pl
@@ -0,0 +1,68 @@
+use strict;
+use warnings;
+use Smart::Comments;
+use DDP;
+
+my $batch;
+{
+    local $/;
+    open my $fh, '<', "input" or die "no input present, $!";
+    $batch = <$fh>;
+}
+
+my $valid = 0;
+
+# the file has to end with a empty line...
+while ($batch =~ m/((?:[^\n][\n]?)+)/gm ) {
+    my $person_passport = $1;
+    my %passport;
+
+    if ($person_passport =~ m/byr:(?<byr>\d{4})\s/) {
+        if ($+{byr} >= 1920 and $+{byr} <= 2002) {
+            $passport{"byr"} = $+{byr};
+        }
+    }
+
+    if ($person_passport =~ m/iyr:(?<iyr>\d{4})\s/) {
+        if ($+{iyr} >= 2010 and $+{iyr} <= 2020) {
+            $passport{"iyr"} = $+{iyr};
+        }
+    }
+
+    if ($person_passport =~ m/eyr:(?<eyr>\d{4})\s/) {
+        if ($+{eyr} >= 2020 and $+{eyr} <= 2030) {
+            $passport{"eyr"} = $+{eyr};
+        }
+    }
+
+    if ($person_passport =~ m/hgt:(?<hgt>\d+)(?<unit>\w{2})\s/) {
+        if ($+{unit} eq "cm") {
+            if ($+{hgt} >= 150 and $+{hgt} <= 193) {
+                $passport{"hgt"} = "$+{hgt}" . $+{unit};
+            }
+        } elsif ($+{unit} eq "in") {
+            if ($+{hgt} >= 59 and $+{hgt} <= 76) {
+                $passport{"hgt"} = "$+{hgt}" . $+{unit};
+            }
+        }
+    }
+
+    if ($person_passport =~ m/hcl:(?<hcl>#[a-f0-9]{6})\s/) {
+        $passport{"hcl"} = $+{hcl};
+    }
+
+    if ($person_passport =~ m/ecl:(?<ecl>amb|blu|brn|gry|grn|hzl|oth)\s/) {
+        $passport{"ecl"} = $+{ecl};
+    }
+
+    if ($person_passport =~ m/pid:(?<pid>[0-9]{9})\s/) {
+        $passport{"pid"} = $+{pid};
+    }
+
+    if (keys %passport == 7) {
+        $valid++;
+        $valids{$passport{"pid"}} = \%passport;
+    }
+}
+
+print("$valid");
diff --git a/2020/day5/boarding.py b/2020/day5/boarding.py
new file mode 100644
index 0000000..336cd63
--- /dev/null
+++ b/2020/day5/boarding.py
@@ -0,0 +1,52 @@
+import math
+
+seat_ids = list()
+
+with open("input", "r") as passes:
+
+    for seat in passes:
+        front = 0
+        back = 127
+
+        left = 0
+        right = 7
+
+        for i in seat:
+            if i == "F":
+                back = math.floor((front + back) / 2)
+            elif i == "B":
+                front = math.ceil((front + back) / 2)
+            elif i == "L":
+                right = math.floor((right + left) / 2)
+            else:
+                left = math.ceil((right + left) / 2)
+
+        assert front == back
+        assert left == right
+
+        row = front
+        col = left
+
+        seat_id = row * 8 + col
+
+        seat_ids.append(seat_id)
+
+seat_ids.sort()
+
+# answer to the first part
+print(seat_ids[-1])
+
+# answer to the second part
+lent = len(seat_ids)
+left = 0
+right = lent - 1
+cursor = 0
+
+while right - left > 1:
+    cursor = math.ceil((left + right) / 2)
+    if (seat_ids[left] - left) != (seat_ids[cursor] - cursor):
+        right = cursor
+    elif (seat_ids[right] - right) != (seat_ids[cursor] - cursor):
+        left = cursor
+
+print(seat_ids[cursor] + 1)
diff --git a/2020/day5/input b/2020/day5/input
new file mode 100644
index 0000000..6ef4cd6
--- /dev/null
+++ b/2020/day5/input
@@ -0,0 +1,824 @@
+FFBBBFBLRL
+BFFFBFBRRR
+BFFFBFBLRL
+BFFBFBBLRR
+BBFFBFFRLL
+BFFFBFBRLR
+FFFFBBBRLR
+BBFFFBBRRR
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+BBFFBFFLLL
+BFFFBFBLLR
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+BFFFFBFLRR
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diff --git a/2020/day6/declaration.pl b/2020/day6/declaration.pl
new file mode 100644
index 0000000..7c87461
--- /dev/null
+++ b/2020/day6/declaration.pl
@@ -0,0 +1,30 @@
+use strict;
+use warnings;
+use Smart::Comments;
+use DDP;
+use List::Util 'sum';
+
+my $batch;
+{
+    local $/;
+    open my $fh, '<', "input" or die "no input present, $!";
+    $batch = <$fh>;
+}
+
+my $total_yes = 0;
+
+while ($batch =~ m/((?:[^\n][\n]?)+)/gm ) {
+    my $group_answers = $1;
+    chomp $group_answers;
+
+    my %counts;
+    while ($group_answers =~ m/^(\w+)$/mg) {
+        my $person_answers = $1;
+        $counts{$_} = 1 for split(//, $person_answers);
+    }
+    # p %counts;
+
+    $total_yes += sum values %counts
+}
+
+print $total_yes;
diff --git a/2020/day6/group_declaration.pl b/2020/day6/group_declaration.pl
new file mode 100644
index 0000000..6370e2f
--- /dev/null
+++ b/2020/day6/group_declaration.pl
@@ -0,0 +1,32 @@
+use strict;
+use warnings;
+use Smart::Comments;
+use DDP;
+
+my $batch;
+{
+    local $/;
+    open my $fh, '<', "input" or die "no input present, $!";
+    $batch = <$fh>;
+}
+
+my $all_yeses = 0;
+
+while ($batch =~ m/((?:[^\n][\n]?)+)/gm ) {
+    my $group_answers = $1;
+
+    # count the newlines = number of people
+    my $peeps = $1 =~ tr/\n//;
+
+    chomp $group_answers;
+
+    my %counts;
+    while ($group_answers =~ m/^(\w+)$/mg) {
+        my $person_answers = $1;
+        ++$counts{$_} for split(//, $person_answers);
+    }
+
+    $all_yeses += scalar grep { $_ == $peeps } values %counts;
+}
+
+print $all_yeses;
diff --git a/2020/day6/input b/2020/day6/input
new file mode 100644
index 0000000..6a9f009
--- /dev/null
+++ b/2020/day6/input
@@ -0,0 +1,2190 @@
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diff --git a/2020/day7/haversacks.py b/2020/day7/haversacks.py
new file mode 100644
index 0000000..4f7292d
--- /dev/null
+++ b/2020/day7/haversacks.py
@@ -0,0 +1,35 @@
+import networkx as nx
+import re
+
+bagtree = nx.DiGraph()
+bagremover = re.compile(r" bags?\.?$")
+numremover = re.compile(r"^\d+ ")
+
+with open("input", "r") as baglines:
+    for line in baglines:
+        (miniroot, child_str) = list(map(str.strip, line.split("contain")))
+
+        miniroot = miniroot.replace(" bags", "")
+
+        children = list(
+            map(
+                lambda b: re.sub(numremover, "", b),
+                list(
+                    map(
+                        lambda a: re.sub(bagremover, "", a),
+                        list(map(str.strip, child_str.split(","))),
+                    )
+                ),
+            )
+        )
+
+        if "no other" in children:
+            continue
+
+        for kid in children:
+            bagtree.add_edge(kid, miniroot)
+
+lengths = dict(nx.all_pairs_shortest_path(bagtree))
+
+# we don't count the shiny gold itself
+print(len(lengths["shiny gold"]) - 1)
diff --git a/2020/day7/input b/2020/day7/input
new file mode 100644
index 0000000..820cca0
--- /dev/null
+++ b/2020/day7/input
@@ -0,0 +1,594 @@
+muted lavender bags contain 5 dull brown bags, 4 pale maroon bags, 2 drab orange bags.
+plaid aqua bags contain 1 posh violet bag, 5 pale yellow bags, 4 bright salmon bags.
+wavy lime bags contain 3 vibrant indigo bags, 1 posh gray bag.
+pale coral bags contain 5 mirrored olive bags, 2 posh salmon bags.
+faded chartreuse bags contain 1 plaid blue bag, 4 clear salmon bags, 5 muted teal bags.
+vibrant indigo bags contain 4 pale red bags, 1 vibrant violet bag.
+vibrant salmon bags contain 1 dull crimson bag, 5 dim coral bags, 4 pale salmon bags, 3 pale fuchsia bags.
+light yellow bags contain 5 clear beige bags, 3 dotted beige bags.
+muted plum bags contain 5 posh silver bags, 3 pale turquoise bags, 3 faded chartreuse bags.
+mirrored indigo bags contain 4 pale tan bags, 1 posh indigo bag, 3 shiny salmon bags, 4 wavy indigo bags.
+pale indigo bags contain 3 dark white bags.
+plaid indigo bags contain 4 mirrored teal bags.
+shiny brown bags contain 1 striped gold bag.
+drab violet bags contain 1 drab magenta bag, 5 posh orange bags, 1 mirrored brown bag, 4 wavy salmon bags.
+pale olive bags contain 2 light black bags, 2 faded tomato bags.
+dark teal bags contain 3 striped fuchsia bags.
+plaid white bags contain 4 shiny salmon bags.
+muted gold bags contain 5 faded lavender bags, 3 striped aqua bags.
+pale cyan bags contain 3 muted tan bags, 5 bright purple bags, 1 posh blue bag.
+pale tan bags contain 3 bright teal bags.
+bright aqua bags contain 5 plaid magenta bags, 5 muted lavender bags, 4 dim turquoise bags, 1 shiny turquoise bag.
+dark gold bags contain 4 dull indigo bags, 5 mirrored orange bags, 5 bright teal bags, 1 dim gold bag.
+muted salmon bags contain 3 muted gray bags, 4 pale salmon bags.
+striped plum bags contain 1 dark indigo bag, 1 vibrant violet bag.
+posh yellow bags contain 3 shiny tan bags, 4 dull lavender bags, 5 pale yellow bags.
+plaid lime bags contain 2 bright brown bags, 4 dull lavender bags.
+mirrored gray bags contain 4 mirrored teal bags, 3 muted indigo bags.
+muted olive bags contain 3 dim fuchsia bags, 2 dim salmon bags, 4 shiny maroon bags.
+dotted blue bags contain 4 plaid orange bags, 5 faded black bags, 2 muted black bags, 5 mirrored lime bags.
+wavy beige bags contain 5 dark aqua bags, 3 mirrored lavender bags, 3 drab fuchsia bags.
+shiny indigo bags contain 3 wavy black bags, 2 dull plum bags.
+drab lavender bags contain 4 mirrored chartreuse bags.
+vibrant tomato bags contain 3 wavy white bags, 1 dull plum bag.
+plaid teal bags contain 3 mirrored bronze bags.
+pale chartreuse bags contain no other bags.
+muted coral bags contain 1 striped lavender bag, 5 dotted crimson bags, 2 faded tomato bags.
+faded aqua bags contain 2 bright plum bags, 3 faded gold bags, 1 mirrored bronze bag, 2 dull lavender bags.
+pale brown bags contain 1 clear salmon bag, 4 drab tan bags, 1 light orange bag, 1 light silver bag.
+drab orange bags contain 3 faded beige bags.
+pale blue bags contain 3 pale plum bags, 3 dotted green bags, 4 dark lime bags, 5 clear beige bags.
+dull purple bags contain 5 posh aqua bags, 1 muted blue bag, 1 bright gray bag, 1 muted chartreuse bag.
+bright silver bags contain 5 dark turquoise bags, 2 dark teal bags, 1 muted tan bag, 3 vibrant tan bags.
+dim silver bags contain 4 plaid black bags.
+faded violet bags contain 5 dark maroon bags.
+pale maroon bags contain 5 dark maroon bags, 4 drab chartreuse bags.
+shiny green bags contain 1 bright chartreuse bag.
+vibrant crimson bags contain 3 dotted red bags, 2 striped violet bags, 1 light bronze bag.
+clear lavender bags contain 1 faded teal bag, 5 clear cyan bags.
+mirrored red bags contain 2 dim gray bags, 2 drab orange bags, 4 muted purple bags, 3 muted white bags.
+striped green bags contain 2 light purple bags, 4 light gold bags, 3 posh magenta bags.
+dim yellow bags contain 1 light crimson bag, 2 muted indigo bags.
+dotted orange bags contain 3 wavy salmon bags, 1 dim fuchsia bag.
+vibrant gray bags contain 1 plaid brown bag, 5 mirrored black bags, 4 plaid olive bags.
+mirrored silver bags contain 2 striped magenta bags, 3 striped coral bags.
+pale magenta bags contain 4 posh tomato bags, 4 plaid blue bags, 2 shiny gold bags, 3 faded beige bags.
+vibrant black bags contain 4 dotted brown bags.
+muted violet bags contain 1 clear tomato bag, 1 striped beige bag.
+clear salmon bags contain 1 drab chartreuse bag, 4 dotted beige bags, 5 light crimson bags, 3 dotted orange bags.
+posh indigo bags contain 3 mirrored teal bags, 5 drab gold bags.
+wavy black bags contain 5 dotted purple bags, 5 plaid chartreuse bags, 3 striped gold bags.
+mirrored lavender bags contain 2 dim black bags.
+shiny maroon bags contain 2 dotted beige bags.
+drab magenta bags contain 2 dim yellow bags.
+pale orange bags contain 1 shiny purple bag, 5 striped turquoise bags, 2 light crimson bags.
+shiny beige bags contain 5 clear white bags, 2 striped turquoise bags, 4 pale yellow bags, 1 muted black bag.
+striped cyan bags contain 2 plaid yellow bags, 2 clear teal bags, 3 wavy olive bags, 4 posh violet bags.
+dull cyan bags contain 1 striped salmon bag.
+vibrant green bags contain 4 dull coral bags, 4 drab yellow bags, 4 dark cyan bags.
+wavy cyan bags contain 5 light salmon bags, 5 dim blue bags, 2 pale green bags, 1 faded indigo bag.
+drab plum bags contain 3 dark magenta bags.
+light aqua bags contain 4 bright bronze bags, 3 wavy lavender bags, 3 dull cyan bags, 2 bright green bags.
+pale plum bags contain 5 clear plum bags.
+vibrant silver bags contain 1 dim lavender bag, 4 bright teal bags.
+wavy white bags contain 1 light crimson bag, 4 wavy salmon bags.
+shiny chartreuse bags contain 2 plaid gray bags, 5 mirrored white bags.
+dull chartreuse bags contain 1 dull cyan bag, 3 striped white bags, 4 posh indigo bags.
+clear magenta bags contain 1 plaid coral bag, 5 light plum bags, 1 bright yellow bag.
+muted white bags contain 2 dull salmon bags, 5 bright turquoise bags, 3 wavy gray bags, 1 plaid black bag.
+dull brown bags contain 3 faded lavender bags.
+muted turquoise bags contain 4 mirrored plum bags, 4 mirrored brown bags, 4 drab salmon bags, 4 mirrored tomato bags.
+posh tomato bags contain 2 drab orange bags, 4 dim lavender bags.
+shiny fuchsia bags contain 3 dull black bags, 5 wavy coral bags.
+dim gray bags contain 3 drab gray bags.
+striped olive bags contain 5 light purple bags, 5 wavy yellow bags, 1 striped fuchsia bag.
+muted maroon bags contain 2 bright white bags.
+light tomato bags contain 1 striped indigo bag, 5 plaid plum bags, 4 clear indigo bags, 4 drab tan bags.
+plaid violet bags contain 2 dim coral bags.
+striped chartreuse bags contain 2 shiny gray bags.
+mirrored white bags contain 4 striped beige bags.
+dim beige bags contain 3 wavy bronze bags, 4 vibrant silver bags, 1 striped white bag, 2 dark plum bags.
+striped violet bags contain 5 dull teal bags, 2 vibrant red bags.
+drab green bags contain 1 striped olive bag, 2 light salmon bags, 1 faded cyan bag, 3 vibrant fuchsia bags.
+clear lime bags contain 2 plaid coral bags, 1 light lavender bag, 4 posh salmon bags.
+striped indigo bags contain 2 pale maroon bags, 5 dotted aqua bags, 3 drab gray bags.
+dim blue bags contain 5 faded bronze bags, 4 dark blue bags.
+faded fuchsia bags contain 3 muted fuchsia bags, 1 light orange bag, 2 striped beige bags, 1 dotted red bag.
+plaid red bags contain 5 pale maroon bags, 3 dark beige bags, 2 striped fuchsia bags.
+drab silver bags contain 1 dim salmon bag, 2 shiny salmon bags.
+dark chartreuse bags contain 1 dull aqua bag.
+clear chartreuse bags contain 5 faded brown bags, 3 dotted aqua bags.
+plaid silver bags contain 5 pale red bags.
+wavy chartreuse bags contain 5 mirrored red bags, 1 dull teal bag.
+clear gray bags contain 5 striped salmon bags, 5 plaid silver bags, 1 clear black bag.
+shiny white bags contain 1 shiny gray bag, 5 vibrant gray bags.
+posh coral bags contain 2 muted white bags.
+light red bags contain 5 muted indigo bags, 1 wavy fuchsia bag.
+dull fuchsia bags contain 4 light plum bags, 4 faded red bags.
+dotted gold bags contain 1 plaid brown bag, 4 dotted aqua bags, 2 pale purple bags.
+faded orange bags contain 3 dotted beige bags.
+bright coral bags contain 2 dark cyan bags, 1 wavy tan bag, 1 vibrant yellow bag.
+striped brown bags contain 5 light yellow bags, 4 dull indigo bags, 4 clear maroon bags.
+light fuchsia bags contain 3 dotted gray bags, 1 striped orange bag, 1 mirrored olive bag, 2 wavy fuchsia bags.
+dotted bronze bags contain 2 dull salmon bags.
+faded red bags contain 2 posh indigo bags, 5 dotted aqua bags.
+wavy teal bags contain 3 faded tomato bags, 4 dark silver bags, 3 shiny cyan bags.
+dim tomato bags contain 4 wavy silver bags, 3 drab red bags.
+muted beige bags contain 1 bright gray bag, 1 dark red bag.
+shiny yellow bags contain 2 light plum bags.
+wavy indigo bags contain 1 faded red bag, 1 plaid yellow bag, 2 dull aqua bags.
+plaid maroon bags contain 5 vibrant beige bags.
+wavy tan bags contain 5 plaid maroon bags.
+striped coral bags contain 1 pale silver bag, 4 clear beige bags, 3 dotted aqua bags, 3 striped turquoise bags.
+shiny black bags contain 1 clear silver bag, 1 mirrored blue bag.
+muted silver bags contain 1 posh teal bag, 4 faded teal bags, 4 plaid aqua bags, 2 striped olive bags.
+pale gray bags contain 4 dotted silver bags.
+light white bags contain 2 dull salmon bags, 5 vibrant violet bags, 1 dull black bag.
+mirrored beige bags contain 3 dark teal bags, 3 wavy coral bags, 3 plaid black bags.
+mirrored tomato bags contain 5 muted bronze bags, 2 drab gold bags, 4 dark plum bags.
+dull magenta bags contain 1 wavy black bag, 5 dull gray bags.
+pale crimson bags contain 3 wavy brown bags, 5 dark green bags, 3 pale fuchsia bags.
+pale beige bags contain 3 posh black bags, 4 dotted gold bags, 1 plaid blue bag.
+dull red bags contain 2 light chartreuse bags, 1 striped tomato bag, 4 plaid green bags, 3 dull chartreuse bags.
+dotted violet bags contain 4 dark plum bags, 3 dull plum bags, 4 pale red bags.
+muted bronze bags contain 2 muted teal bags, 5 shiny purple bags, 4 pale chartreuse bags, 4 wavy salmon bags.
+dark coral bags contain 5 dull indigo bags, 1 vibrant plum bag, 2 mirrored black bags, 4 drab gold bags.
+shiny magenta bags contain 5 light turquoise bags, 4 striped olive bags.
+faded olive bags contain 2 clear white bags.
+pale aqua bags contain 2 vibrant fuchsia bags.
+vibrant yellow bags contain 4 muted teal bags, 1 mirrored teal bag.
+dotted lime bags contain 5 dotted white bags, 2 wavy aqua bags, 3 pale salmon bags.
+dark bronze bags contain 1 clear beige bag, 1 muted olive bag.
+dim lavender bags contain 1 dull indigo bag, 2 shiny purple bags, 4 dull teal bags.
+wavy gold bags contain 5 dull black bags, 1 muted fuchsia bag, 4 dark red bags, 1 light crimson bag.
+striped crimson bags contain 5 shiny gray bags, 3 mirrored crimson bags, 2 drab chartreuse bags, 4 dull aqua bags.
+dark aqua bags contain 1 bright indigo bag, 5 muted white bags, 2 shiny crimson bags, 3 mirrored orange bags.
+posh black bags contain 3 pale tan bags, 1 dim brown bag, 5 clear green bags.
+bright beige bags contain 4 dotted black bags.
+dull maroon bags contain 1 drab red bag, 4 faded turquoise bags, 1 pale olive bag.
+dull salmon bags contain 3 mirrored olive bags, 3 dull indigo bags, 1 dim brown bag, 4 shiny lime bags.
+faded purple bags contain 4 faded indigo bags.
+light beige bags contain 1 posh gray bag, 3 dotted white bags, 1 striped silver bag.
+vibrant magenta bags contain 4 drab red bags, 1 dotted white bag, 5 striped aqua bags.
+light maroon bags contain 1 dull black bag.
+light olive bags contain 3 dull tan bags.
+vibrant lime bags contain 2 dim lavender bags.
+muted aqua bags contain 3 bright olive bags, 1 muted teal bag, 3 dull crimson bags.
+dotted beige bags contain no other bags.
+dotted indigo bags contain 2 light lavender bags, 5 dark white bags, 3 wavy gray bags, 4 plaid chartreuse bags.
+drab yellow bags contain 4 mirrored aqua bags, 5 plaid olive bags, 5 dull black bags, 4 striped turquoise bags.
+light lime bags contain 3 striped turquoise bags, 4 muted coral bags, 5 muted yellow bags, 4 mirrored silver bags.
+dark crimson bags contain 2 light bronze bags, 1 vibrant chartreuse bag.
+clear plum bags contain 1 muted indigo bag, 5 dim red bags, 2 pale orange bags, 5 light black bags.
+mirrored violet bags contain 3 wavy salmon bags.
+striped silver bags contain 5 bright olive bags, 5 dim brown bags, 2 posh blue bags, 1 posh purple bag.
+posh gold bags contain 5 faded lavender bags.
+striped lime bags contain 4 striped coral bags.
+plaid tomato bags contain 2 dull white bags, 1 wavy white bag, 5 drab red bags.
+drab tan bags contain 1 mirrored bronze bag, 1 mirrored tomato bag, 2 mirrored green bags.
+posh purple bags contain 4 dull cyan bags.
+plaid blue bags contain 2 muted fuchsia bags, 1 bright teal bag, 2 pale chartreuse bags.
+dim lime bags contain 4 drab gold bags, 1 muted fuchsia bag, 1 posh tomato bag.
+dark white bags contain 2 wavy gold bags.
+bright red bags contain 4 light fuchsia bags, 1 plaid orange bag, 1 pale red bag.
+wavy blue bags contain 4 striped red bags, 1 mirrored black bag.
+light teal bags contain 1 faded orange bag, 5 muted white bags.
+shiny blue bags contain 1 drab red bag, 3 shiny brown bags, 2 dark teal bags, 2 dotted silver bags.
+bright gray bags contain 3 muted teal bags, 2 clear plum bags, 5 light olive bags, 5 dark red bags.
+bright black bags contain 5 posh yellow bags, 1 striped maroon bag.
+shiny gold bags contain 3 wavy gold bags, 2 plaid chartreuse bags, 2 shiny lime bags, 5 dull indigo bags.
+striped teal bags contain 4 dark lime bags, 4 light yellow bags, 2 dull brown bags.
+wavy coral bags contain 3 dim yellow bags, 1 clear red bag, 4 pale chartreuse bags.
+plaid chartreuse bags contain 1 striped maroon bag, 5 dotted yellow bags.
+pale turquoise bags contain 3 clear yellow bags, 2 dim coral bags.
+vibrant plum bags contain 3 dotted yellow bags.
+drab cyan bags contain 5 vibrant green bags.
+wavy crimson bags contain 1 mirrored gray bag, 2 dim teal bags.
+wavy maroon bags contain 3 pale tan bags.
+light orange bags contain 4 vibrant silver bags, 2 dim olive bags, 2 drab red bags.
+plaid brown bags contain 2 bright turquoise bags, 4 shiny tan bags, 2 dull indigo bags, 3 plaid olive bags.
+posh silver bags contain 5 wavy coral bags.
+wavy bronze bags contain 1 plaid yellow bag, 1 dim gold bag.
+shiny violet bags contain 5 plaid coral bags, 2 mirrored brown bags.
+posh lime bags contain 3 wavy bronze bags, 2 striped tomato bags, 2 pale tan bags.
+dim salmon bags contain 3 dim brown bags, 5 drab chartreuse bags.
+faded beige bags contain no other bags.
+dotted gray bags contain 5 dark lime bags, 2 posh black bags, 3 muted fuchsia bags.
+dull crimson bags contain 5 vibrant fuchsia bags.
+drab brown bags contain 5 pale maroon bags, 5 light crimson bags.
+bright blue bags contain 5 vibrant brown bags.
+bright violet bags contain 1 light white bag, 5 clear beige bags, 2 dull crimson bags.
+plaid magenta bags contain 2 light plum bags, 1 wavy white bag, 5 pale green bags, 1 bright tomato bag.
+faded silver bags contain 5 light black bags, 5 mirrored teal bags, 5 vibrant plum bags.
+wavy brown bags contain 4 faded gray bags, 3 dotted olive bags, 1 light silver bag.
+clear teal bags contain 2 mirrored black bags, 2 wavy gold bags, 2 striped red bags, 5 light silver bags.
+posh crimson bags contain 5 drab tan bags.
+clear fuchsia bags contain 4 faded tomato bags, 1 dotted beige bag.
+bright maroon bags contain 2 wavy teal bags, 2 shiny gray bags, 5 dull gray bags, 3 dull teal bags.
+drab gray bags contain 3 dark white bags, 2 pale salmon bags, 4 bright teal bags.
+vibrant brown bags contain 4 wavy salmon bags.
+bright green bags contain 2 clear cyan bags, 3 wavy lavender bags, 2 plaid blue bags, 2 faded gold bags.
+light salmon bags contain 1 muted tan bag, 5 plaid plum bags.
+plaid bronze bags contain 4 mirrored chartreuse bags, 3 plaid turquoise bags, 2 wavy orange bags, 5 dotted yellow bags.
+dull bronze bags contain 2 vibrant lime bags, 2 muted purple bags, 2 dark magenta bags.
+bright orange bags contain 4 pale violet bags, 2 light fuchsia bags, 3 dull purple bags.
+wavy fuchsia bags contain 4 dotted olive bags, 1 dull brown bag.
+mirrored olive bags contain 4 muted fuchsia bags, 4 striped turquoise bags.
+shiny salmon bags contain 2 dark white bags.
+striped tan bags contain 4 mirrored purple bags.
+dull coral bags contain 3 posh coral bags, 1 dotted green bag.
+drab teal bags contain 4 wavy yellow bags, 5 mirrored aqua bags.
+shiny tan bags contain 5 striped maroon bags, 5 vibrant red bags.
+bright crimson bags contain 1 muted magenta bag.
+shiny lime bags contain 1 faded teal bag, 1 light crimson bag.
+posh white bags contain 3 posh orange bags, 4 pale gray bags, 5 dull maroon bags, 5 plaid plum bags.
+dotted brown bags contain 1 vibrant indigo bag, 1 plaid olive bag.
+faded coral bags contain 5 muted bronze bags, 3 mirrored lavender bags.
+faded brown bags contain 1 bright turquoise bag, 3 posh indigo bags, 2 pale fuchsia bags, 3 dark indigo bags.
+vibrant aqua bags contain 2 clear beige bags, 3 posh olive bags, 3 dark turquoise bags, 2 posh magenta bags.
+dark turquoise bags contain 1 striped gold bag, 1 mirrored red bag.
+drab gold bags contain 2 clear beige bags, 4 striped turquoise bags, 1 pale orange bag, 1 clear salmon bag.
+mirrored green bags contain 4 dotted beige bags, 3 pale chartreuse bags, 3 light crimson bags.
+clear violet bags contain 3 posh orange bags, 4 faded beige bags, 3 drab red bags, 4 shiny salmon bags.
+posh plum bags contain 1 shiny white bag, 1 striped lavender bag.
+vibrant purple bags contain 5 bright teal bags.
+dark salmon bags contain 4 striped olive bags, 5 mirrored crimson bags, 5 plaid lime bags, 3 dark tomato bags.
+shiny silver bags contain 2 vibrant red bags.
+dull turquoise bags contain 3 faded crimson bags, 1 drab maroon bag, 5 drab gold bags.
+dull orange bags contain 1 dark yellow bag, 3 bright beige bags.
+bright bronze bags contain 3 posh salmon bags, 1 mirrored violet bag, 2 muted white bags, 3 dotted orange bags.
+bright teal bags contain 4 dim fuchsia bags.
+clear turquoise bags contain 1 faded teal bag, 2 dull teal bags.
+wavy magenta bags contain 4 dim teal bags, 3 mirrored bronze bags, 3 plaid plum bags, 5 wavy lavender bags.
+faded bronze bags contain 2 striped salmon bags, 3 dark red bags, 1 dark indigo bag.
+faded plum bags contain 1 clear green bag.
+faded maroon bags contain 1 striped maroon bag, 5 dim black bags, 1 vibrant indigo bag.
+muted teal bags contain 4 light crimson bags, 5 drab chartreuse bags.
+vibrant maroon bags contain 3 dark fuchsia bags, 3 plaid turquoise bags, 1 pale silver bag, 4 shiny cyan bags.
+plaid crimson bags contain 3 mirrored olive bags.
+clear tan bags contain 1 vibrant purple bag, 1 wavy aqua bag.
+clear aqua bags contain 4 bright white bags.
+striped red bags contain 3 wavy coral bags, 3 dark white bags, 4 muted fuchsia bags, 4 posh tomato bags.
+posh violet bags contain 1 muted fuchsia bag, 3 dim coral bags, 2 drab orange bags.
+plaid cyan bags contain 2 shiny indigo bags.
+light chartreuse bags contain 5 wavy tan bags, 4 clear indigo bags.
+vibrant lavender bags contain 3 light gray bags, 4 striped beige bags, 5 dark maroon bags, 3 drab fuchsia bags.
+dim red bags contain 4 pale orange bags, 3 drab chartreuse bags.
+vibrant turquoise bags contain 3 clear tomato bags, 4 posh blue bags.
+muted green bags contain 4 clear bronze bags, 3 dotted black bags, 3 dull beige bags.
+faded salmon bags contain 2 drab gold bags, 2 clear red bags, 2 dark indigo bags, 5 plaid teal bags.
+posh chartreuse bags contain 4 dotted orange bags.
+dotted turquoise bags contain 5 shiny fuchsia bags, 2 vibrant indigo bags, 3 vibrant fuchsia bags, 5 muted green bags.
+wavy turquoise bags contain 1 dark white bag, 4 posh tan bags.
+clear purple bags contain 2 vibrant gray bags, 3 dark plum bags, 1 shiny fuchsia bag, 4 plaid indigo bags.
+pale tomato bags contain 2 striped silver bags, 1 mirrored aqua bag.
+pale salmon bags contain 4 muted indigo bags, 4 faded teal bags.
+dark maroon bags contain 5 dotted orange bags, 5 faded beige bags, 3 wavy salmon bags, 5 dim lavender bags.
+faded green bags contain 3 wavy coral bags, 5 dull indigo bags, 4 dim salmon bags, 1 pale gray bag.
+bright gold bags contain 4 drab lavender bags.
+dull white bags contain 4 clear salmon bags, 2 shiny gold bags.
+drab olive bags contain 3 pale lime bags, 3 striped crimson bags, 5 plaid gray bags, 2 posh magenta bags.
+bright cyan bags contain 4 dotted black bags.
+drab beige bags contain 4 shiny yellow bags.
+dotted salmon bags contain 5 light maroon bags, 5 dotted gray bags.
+posh gray bags contain 3 dark red bags, 2 mirrored gray bags, 2 dim brown bags, 4 dotted aqua bags.
+dull gray bags contain 2 shiny beige bags, 5 posh silver bags.
+light blue bags contain 1 dim coral bag, 5 vibrant plum bags, 1 clear salmon bag, 1 clear yellow bag.
+striped gray bags contain 5 striped indigo bags, 1 faded lime bag, 2 light tomato bags.
+dark violet bags contain 1 posh gray bag, 5 shiny cyan bags, 2 pale indigo bags, 4 light coral bags.
+striped black bags contain 5 dotted maroon bags, 1 drab blue bag.
+shiny coral bags contain 1 clear yellow bag, 5 striped plum bags, 4 dull tomato bags.
+faded tan bags contain 5 vibrant bronze bags, 5 muted fuchsia bags, 1 pale coral bag, 4 dull indigo bags.
+pale white bags contain 4 clear cyan bags, 2 bright yellow bags, 4 vibrant tomato bags.
+plaid plum bags contain 5 pale violet bags, 3 posh yellow bags, 3 faded silver bags.
+bright fuchsia bags contain 5 clear black bags.
+dotted red bags contain 3 dark magenta bags, 5 clear indigo bags, 1 faded bronze bag, 4 dotted gray bags.
+plaid turquoise bags contain 2 dark indigo bags.
+pale lavender bags contain 4 posh fuchsia bags, 1 clear black bag, 4 wavy lime bags.
+bright lavender bags contain 2 wavy magenta bags, 5 plaid blue bags, 1 drab yellow bag, 1 muted gray bag.
+bright white bags contain 4 light gray bags.
+dull black bags contain 2 shiny lime bags, 3 muted indigo bags, 5 faded beige bags.
+muted tomato bags contain 2 dark yellow bags.
+plaid fuchsia bags contain 2 dull lavender bags.
+dark indigo bags contain 2 dim lavender bags, 3 shiny maroon bags.
+mirrored magenta bags contain 1 mirrored chartreuse bag.
+vibrant violet bags contain 5 dotted beige bags, 5 plaid olive bags.
+pale lime bags contain 1 vibrant silver bag, 4 shiny white bags, 2 wavy orange bags, 3 plaid coral bags.
+mirrored aqua bags contain 5 light yellow bags, 3 plaid silver bags, 2 dark white bags, 2 dull teal bags.
+striped turquoise bags contain 1 bright turquoise bag, 2 faded beige bags.
+faded indigo bags contain 2 dotted purple bags.
+plaid green bags contain 3 dim orange bags.
+dotted lavender bags contain 5 dotted crimson bags, 5 bright turquoise bags, 3 muted lavender bags, 4 mirrored olive bags.
+muted tan bags contain 2 faded orange bags, 5 mirrored gray bags, 1 faded green bag.
+dark plum bags contain 2 mirrored olive bags, 4 muted fuchsia bags, 2 shiny maroon bags, 1 dim fuchsia bag.
+light cyan bags contain 4 dotted gray bags, 4 wavy red bags, 1 dull white bag.
+striped gold bags contain 2 wavy silver bags, 2 muted purple bags, 3 wavy coral bags.
+striped white bags contain 4 wavy coral bags, 4 pale plum bags, 2 wavy black bags, 5 dim olive bags.
+mirrored yellow bags contain 3 plaid chartreuse bags, 4 muted gold bags, 1 mirrored bronze bag.
+clear tomato bags contain 3 striped indigo bags, 3 dim fuchsia bags, 2 wavy gray bags.
+faded teal bags contain no other bags.
+faded lavender bags contain 2 clear bronze bags, 3 muted teal bags, 2 dotted yellow bags, 5 shiny purple bags.
+posh lavender bags contain 5 posh gray bags.
+bright brown bags contain 2 dull crimson bags, 5 muted bronze bags, 4 dark indigo bags, 5 mirrored orange bags.
+faded crimson bags contain 3 dotted crimson bags.
+mirrored teal bags contain 1 plaid blue bag, 1 clear red bag, 5 striped turquoise bags, 4 dotted beige bags.
+dark fuchsia bags contain 1 faded green bag.
+dim coral bags contain 5 clear salmon bags, 4 dotted beige bags, 1 pale salmon bag, 2 plaid chartreuse bags.
+posh blue bags contain 3 pale maroon bags, 5 dim coral bags.
+light indigo bags contain 1 vibrant silver bag, 1 bright chartreuse bag, 1 light black bag.
+shiny lavender bags contain 4 dotted olive bags, 5 faded brown bags, 1 plaid tomato bag.
+dotted white bags contain 4 dim olive bags.
+dotted chartreuse bags contain 4 striped turquoise bags, 1 dotted silver bag.
+faded black bags contain 2 muted white bags, 3 drab teal bags, 3 wavy gray bags.
+vibrant white bags contain 4 dark white bags, 4 clear violet bags, 3 plaid magenta bags, 5 dark green bags.
+faded magenta bags contain 3 faded green bags, 4 plaid olive bags, 5 plaid brown bags, 1 wavy salmon bag.
+dull plum bags contain 3 muted purple bags.
+dim indigo bags contain 5 dotted fuchsia bags, 5 drab red bags, 1 dull green bag, 5 dim fuchsia bags.
+pale yellow bags contain 4 mirrored bronze bags.
+light violet bags contain 5 dull black bags.
+posh green bags contain 1 plaid plum bag, 3 pale violet bags, 5 muted salmon bags.
+mirrored purple bags contain 3 mirrored aqua bags, 1 plaid blue bag.
+clear orange bags contain 3 light beige bags.
+striped tomato bags contain 4 dark orange bags, 1 bright aqua bag.
+dark gray bags contain 1 posh violet bag.
+plaid beige bags contain 5 pale beige bags.
+plaid gray bags contain 3 mirrored bronze bags, 3 clear green bags, 5 dark chartreuse bags.
+mirrored coral bags contain 1 pale tan bag, 2 plaid coral bags, 5 striped bronze bags.
+dull silver bags contain 1 vibrant purple bag, 3 drab lavender bags, 2 mirrored salmon bags.
+clear yellow bags contain 1 shiny gold bag, 4 dotted beige bags, 4 dark lime bags.
+light gold bags contain 3 shiny white bags, 4 dim violet bags, 1 light olive bag.
+drab white bags contain 5 shiny lavender bags, 4 dotted lavender bags.
+faded yellow bags contain 2 dull crimson bags, 3 muted indigo bags, 2 plaid crimson bags, 3 clear green bags.
+light gray bags contain 2 plaid orange bags, 5 plaid lavender bags.
+dim bronze bags contain 1 vibrant coral bag, 1 wavy teal bag, 1 pale crimson bag.
+shiny gray bags contain 5 light lavender bags, 3 drab red bags, 1 plaid chartreuse bag.
+striped beige bags contain 3 light black bags, 1 dull teal bag.
+dotted fuchsia bags contain 3 faded indigo bags, 2 dim gray bags.
+plaid yellow bags contain 4 pale maroon bags, 5 dull black bags, 1 plaid chartreuse bag, 3 drab orange bags.
+muted orange bags contain 3 muted lavender bags.
+muted crimson bags contain 4 muted cyan bags, 1 dull plum bag.
+muted red bags contain 5 faded turquoise bags, 5 light silver bags, 5 dotted aqua bags.
+vibrant chartreuse bags contain 4 wavy violet bags, 1 plaid beige bag, 2 clear cyan bags, 2 dull lavender bags.
+pale fuchsia bags contain 3 plaid blue bags, 3 muted bronze bags, 4 faded blue bags.
+dotted tomato bags contain 4 dark tomato bags, 3 plaid orange bags, 5 posh teal bags.
+dim green bags contain 1 dull white bag.
+dim aqua bags contain 2 light silver bags, 3 faded silver bags, 3 dotted orange bags, 4 vibrant salmon bags.
+dim brown bags contain no other bags.
+muted chartreuse bags contain 2 dark coral bags, 5 striped plum bags.
+drab indigo bags contain 2 posh brown bags.
+dark orange bags contain 4 plaid blue bags, 1 dark brown bag, 2 striped indigo bags, 1 dark magenta bag.
+bright yellow bags contain 3 clear tomato bags.
+clear bronze bags contain 4 wavy salmon bags.
+dotted olive bags contain 4 striped beige bags, 3 drab orange bags, 3 bright teal bags.
+dull violet bags contain 4 plaid salmon bags, 5 faded olive bags.
+clear white bags contain 2 plaid coral bags, 1 muted indigo bag, 1 striped beige bag.
+dull tan bags contain 5 dim red bags, 5 posh gold bags, 2 clear red bags.
+mirrored plum bags contain 4 dim beige bags.
+wavy purple bags contain 2 posh silver bags, 5 shiny tan bags, 3 pale red bags, 3 dull salmon bags.
+dim black bags contain 3 light yellow bags.
+dotted coral bags contain 3 pale violet bags.
+posh bronze bags contain 1 posh tomato bag, 1 drab purple bag, 3 dim fuchsia bags, 2 bright brown bags.
+wavy salmon bags contain no other bags.
+dull blue bags contain 5 dark plum bags, 4 light yellow bags.
+faded lime bags contain 2 dim red bags, 3 drab lavender bags, 5 muted black bags, 2 light coral bags.
+vibrant coral bags contain 4 muted purple bags, 5 pale chartreuse bags, 5 dotted black bags.
+mirrored chartreuse bags contain 5 muted olive bags.
+dark lime bags contain 1 dark magenta bag.
+light coral bags contain 2 dull lavender bags.
+bright lime bags contain 2 wavy bronze bags.
+mirrored orange bags contain 1 pale salmon bag, 1 light orange bag.
+muted brown bags contain 3 clear beige bags, 1 faded salmon bag, 2 vibrant cyan bags, 4 clear white bags.
+posh orange bags contain 2 dark lime bags, 3 wavy purple bags.
+posh magenta bags contain 2 dark teal bags.
+drab salmon bags contain 5 drab tomato bags.
+muted fuchsia bags contain no other bags.
+wavy tomato bags contain 4 wavy black bags, 4 faded teal bags.
+dim chartreuse bags contain 5 drab green bags, 4 drab magenta bags.
+dotted crimson bags contain 2 dark white bags, 5 wavy black bags, 4 dull crimson bags.
+posh maroon bags contain 4 plaid silver bags, 4 vibrant lime bags, 4 posh gray bags, 3 dull maroon bags.
+dull green bags contain 5 muted tan bags, 5 drab red bags.
+clear maroon bags contain 3 faded brown bags.
+striped yellow bags contain 4 faded lavender bags, 1 wavy coral bag, 5 clear maroon bags.
+dull tomato bags contain 2 shiny white bags, 2 light silver bags, 4 dotted chartreuse bags, 4 dark brown bags.
+drab chartreuse bags contain 3 dotted beige bags, 3 pale chartreuse bags, 2 muted fuchsia bags, 5 light crimson bags.
+plaid purple bags contain 3 drab yellow bags.
+light plum bags contain 1 dotted aqua bag, 2 dark white bags.
+mirrored brown bags contain 3 mirrored teal bags, 2 dull cyan bags.
+mirrored crimson bags contain 3 dull chartreuse bags, 2 dark silver bags, 5 bright cyan bags, 4 dark tomato bags.
+dull gold bags contain 4 muted salmon bags.
+wavy olive bags contain 3 mirrored brown bags, 5 clear indigo bags.
+faded turquoise bags contain 2 clear salmon bags, 2 mirrored gray bags, 1 dark lime bag.
+bright indigo bags contain 2 faded lavender bags, 1 shiny gray bag, 4 mirrored indigo bags.
+pale teal bags contain 3 dark violet bags, 5 shiny salmon bags.
+plaid orange bags contain 5 faded green bags, 5 pale magenta bags.
+shiny crimson bags contain 5 shiny green bags, 1 bright tomato bag, 3 vibrant lime bags, 3 clear purple bags.
+muted indigo bags contain 4 dim brown bags, 1 dotted beige bag.
+dark cyan bags contain 2 striped yellow bags.
+dull teal bags contain 1 muted indigo bag, 2 drab chartreuse bags, 5 faded beige bags.
+striped fuchsia bags contain 1 mirrored teal bag, 3 dull black bags, 2 dim salmon bags, 5 wavy salmon bags.
+drab crimson bags contain 5 dim teal bags, 2 wavy red bags, 3 dark brown bags.
+dull olive bags contain 1 clear yellow bag, 4 plaid indigo bags, 4 posh tomato bags, 1 dotted orange bag.
+muted lime bags contain 2 light white bags, 5 dotted violet bags, 5 posh gold bags, 2 bright cyan bags.
+dark purple bags contain 1 light lavender bag, 2 plaid olive bags, 5 striped maroon bags, 1 dotted gold bag.
+dull yellow bags contain 5 mirrored beige bags.
+dotted maroon bags contain 3 clear salmon bags, 1 light salmon bag.
+dull beige bags contain 5 shiny fuchsia bags.
+clear green bags contain 4 muted lavender bags, 5 faded orange bags, 4 faded silver bags, 4 clear red bags.
+striped magenta bags contain 2 dotted plum bags.
+posh beige bags contain 5 vibrant maroon bags, 1 dim lavender bag.
+striped blue bags contain 3 clear turquoise bags, 3 dark purple bags, 3 shiny yellow bags, 5 clear teal bags.
+muted magenta bags contain 3 striped orange bags, 5 dim brown bags.
+vibrant orange bags contain 1 bright teal bag, 1 drab salmon bag, 5 dull silver bags.
+pale violet bags contain 4 shiny tan bags, 2 clear turquoise bags, 2 pale salmon bags, 2 dotted aqua bags.
+dotted aqua bags contain 2 striped turquoise bags, 1 dim fuchsia bag, 2 pale chartreuse bags, 2 bright turquoise bags.
+clear black bags contain 4 dotted beige bags, 1 dull brown bag, 2 dull teal bags.
+light tan bags contain 3 dotted red bags, 1 dark red bag.
+pale green bags contain 4 dull salmon bags, 4 dim brown bags.
+dim tan bags contain 2 posh silver bags, 2 dark fuchsia bags.
+plaid coral bags contain 2 vibrant plum bags, 5 vibrant red bags, 3 dim salmon bags.
+wavy lavender bags contain 2 dark gold bags, 5 plaid blue bags, 1 dim yellow bag.
+dim violet bags contain 2 clear tan bags, 5 pale magenta bags.
+dotted black bags contain 4 dark magenta bags.
+mirrored salmon bags contain 3 vibrant beige bags, 3 vibrant purple bags.
+dark green bags contain 4 dotted yellow bags, 1 faded green bag, 3 muted lavender bags.
+faded blue bags contain 4 clear turquoise bags, 1 posh indigo bag, 2 faded green bags.
+pale black bags contain 2 pale coral bags, 3 faded black bags, 3 mirrored teal bags, 4 muted chartreuse bags.
+plaid black bags contain 3 posh brown bags, 3 dark maroon bags, 1 mirrored black bag.
+dim olive bags contain 5 posh indigo bags.
+dark lavender bags contain 3 light gold bags, 5 dim purple bags.
+shiny turquoise bags contain 3 dim fuchsia bags, 4 faded silver bags, 4 dim salmon bags.
+light green bags contain 1 drab red bag.
+wavy plum bags contain 2 wavy gold bags, 5 bright tan bags.
+vibrant tan bags contain 3 drab gray bags.
+shiny orange bags contain 2 clear plum bags, 1 posh red bag.
+dull lime bags contain 3 pale silver bags.
+shiny cyan bags contain 3 shiny purple bags.
+posh brown bags contain 1 striped salmon bag, 2 dotted beige bags.
+mirrored blue bags contain 2 muted olive bags, 5 mirrored aqua bags.
+dark red bags contain 2 shiny purple bags, 4 dim salmon bags, 2 wavy salmon bags.
+wavy gray bags contain 4 striped fuchsia bags, 2 wavy salmon bags, 4 faded silver bags.
+clear gold bags contain 2 vibrant plum bags.
+dark silver bags contain 4 striped gold bags, 4 plaid teal bags, 1 pale yellow bag.
+dim cyan bags contain 4 mirrored blue bags, 1 vibrant red bag, 5 shiny indigo bags, 5 muted gray bags.
+bright chartreuse bags contain 4 light yellow bags, 3 faded lavender bags.
+dotted green bags contain 3 pale indigo bags, 3 drab gray bags, 2 dark white bags, 4 light yellow bags.
+vibrant bronze bags contain 5 light white bags, 1 dim lime bag, 5 dim brown bags, 5 plaid coral bags.
+muted purple bags contain 3 dark maroon bags.
+bright salmon bags contain 3 clear beige bags.
+mirrored lime bags contain 1 wavy coral bag, 1 mirrored gray bag.
+faded cyan bags contain 2 pale bronze bags, 3 vibrant plum bags.
+dull aqua bags contain 2 dark coral bags, 3 clear turquoise bags.
+posh aqua bags contain 1 pale teal bag, 2 dim coral bags.
+wavy aqua bags contain 2 posh indigo bags, 4 shiny cyan bags, 3 muted tan bags.
+dark magenta bags contain 1 pale red bag, 1 dull brown bag, 3 faded lavender bags.
+striped lavender bags contain 4 striped gold bags, 3 mirrored olive bags, 2 dim lime bags, 1 muted indigo bag.
+bright turquoise bags contain no other bags.
+dim teal bags contain 5 dark white bags, 2 faded chartreuse bags, 1 striped beige bag, 4 muted gold bags.
+wavy yellow bags contain 4 pale fuchsia bags.
+muted black bags contain 1 striped salmon bag, 1 shiny gold bag, 3 plaid gray bags.
+dark beige bags contain 3 wavy gray bags, 5 dim red bags.
+mirrored tan bags contain 2 faded purple bags, 4 faded lime bags, 5 dull lavender bags, 4 dark plum bags.
+vibrant teal bags contain 1 dark teal bag, 4 dotted chartreuse bags.
+bright plum bags contain 1 vibrant silver bag.
+dotted purple bags contain 3 faded beige bags, 3 muted lavender bags.
+faded tomato bags contain 1 muted olive bag, 5 faded orange bags, 5 light yellow bags.
+light crimson bags contain no other bags.
+drab fuchsia bags contain 2 vibrant silver bags, 1 dim fuchsia bag, 3 clear plum bags, 1 drab gold bag.
+muted blue bags contain 1 dotted silver bag, 5 dull beige bags, 3 posh silver bags.
+dark brown bags contain 1 clear red bag, 2 light yellow bags, 1 wavy gold bag, 2 plaid olive bags.
+dim gold bags contain 4 dotted purple bags, 3 plaid blue bags.
+dim crimson bags contain 5 muted magenta bags.
+shiny teal bags contain 1 dotted bronze bag, 4 vibrant teal bags, 4 pale blue bags.
+drab blue bags contain 3 dark salmon bags.
+bright olive bags contain 5 pale fuchsia bags.
+mirrored gold bags contain 2 posh brown bags, 2 bright purple bags, 5 shiny cyan bags.
+dim turquoise bags contain 4 pale cyan bags, 2 mirrored violet bags.
+clear silver bags contain 4 dark plum bags, 4 pale gray bags, 5 mirrored bronze bags.
+clear olive bags contain 4 muted green bags.
+drab lime bags contain 3 dotted aqua bags, 2 faded blue bags, 3 faded salmon bags, 3 dim yellow bags.
+dim fuchsia bags contain no other bags.
+mirrored black bags contain 1 dark white bag.
+clear cyan bags contain 3 plaid chartreuse bags, 3 plaid teal bags, 5 dark gold bags, 5 dim lime bags.
+bright tomato bags contain 4 dark green bags.
+dim white bags contain 2 shiny yellow bags, 1 pale maroon bag.
+light turquoise bags contain 5 posh blue bags, 2 light fuchsia bags.
+shiny olive bags contain 5 vibrant white bags, 3 dark salmon bags, 5 dotted tan bags.
+striped maroon bags contain 1 mirrored olive bag.
+striped salmon bags contain 3 muted indigo bags, 5 wavy salmon bags, 4 shiny maroon bags, 4 dim fuchsia bags.
+striped orange bags contain 2 dotted purple bags, 4 shiny cyan bags, 1 drab gold bag, 4 dark beige bags.
+posh olive bags contain 3 faded tomato bags, 5 posh blue bags, 1 clear red bag.
+shiny plum bags contain 3 pale purple bags, 3 dim beige bags.
+dark olive bags contain 4 dull coral bags.
+dotted teal bags contain 5 plaid lavender bags, 4 clear bronze bags, 4 dim lime bags, 3 pale maroon bags.
+clear brown bags contain 2 wavy teal bags, 1 faded green bag, 5 light white bags.
+clear crimson bags contain 4 pale turquoise bags, 5 plaid green bags, 3 shiny aqua bags, 5 wavy turquoise bags.
+mirrored maroon bags contain 5 bright coral bags, 5 drab orange bags.
+wavy violet bags contain 4 mirrored tomato bags, 4 striped gold bags.
+plaid olive bags contain 3 dotted silver bags.
+light purple bags contain 2 dark red bags, 5 dull cyan bags, 4 plaid black bags.
+wavy orange bags contain 1 dim green bag, 4 dark coral bags.
+vibrant red bags contain 4 posh brown bags.
+wavy silver bags contain 5 faded orange bags, 2 wavy coral bags, 4 faded silver bags.
+dark tan bags contain 3 mirrored brown bags, 2 bright plum bags, 2 plaid silver bags.
+vibrant blue bags contain 1 wavy salmon bag, 5 pale green bags.
+shiny bronze bags contain 5 wavy white bags, 1 dim indigo bag, 5 muted crimson bags, 5 shiny lime bags.
+clear red bags contain 1 dotted aqua bag, 3 pale chartreuse bags, 2 muted teal bags, 5 posh brown bags.
+dotted silver bags contain 2 dark maroon bags, 3 dim brown bags.
+bright tan bags contain 1 posh black bag, 5 striped orange bags, 5 drab gold bags.
+drab red bags contain 5 posh gray bags.
+striped purple bags contain 1 striped silver bag, 1 pale blue bag, 4 mirrored black bags.
+striped bronze bags contain 2 striped gold bags, 5 light crimson bags, 5 faded tomato bags, 3 wavy indigo bags.
+pale red bags contain 2 mirrored olive bags, 5 faded orange bags, 4 faded chartreuse bags, 2 plaid chartreuse bags.
+dim plum bags contain 4 vibrant coral bags, 3 clear purple bags, 3 dull blue bags.
+muted yellow bags contain 2 clear red bags, 3 pale plum bags.
+posh salmon bags contain 3 pale tan bags, 3 wavy gold bags.
+mirrored bronze bags contain 4 faded bronze bags, 1 clear black bag, 5 dark white bags.
+muted cyan bags contain 2 dim plum bags.
+vibrant fuchsia bags contain 1 faded teal bag, 2 muted teal bags, 3 pale chartreuse bags, 3 bright teal bags.
+mirrored fuchsia bags contain 4 dull red bags, 1 light cyan bag, 3 wavy crimson bags, 3 wavy yellow bags.
+clear indigo bags contain 5 clear bronze bags, 4 dark coral bags, 4 drab chartreuse bags.
+pale bronze bags contain 2 faded salmon bags, 1 shiny black bag, 3 pale yellow bags, 3 dotted chartreuse bags.
+pale purple bags contain 4 mirrored black bags, 1 vibrant silver bag, 2 striped beige bags, 5 dotted chartreuse bags.
+muted gray bags contain 4 shiny purple bags, 4 light green bags, 1 pale fuchsia bag.
+clear blue bags contain 5 dotted olive bags, 4 light purple bags.
+posh cyan bags contain 5 muted tan bags, 1 dotted cyan bag, 4 wavy gold bags.
+bright purple bags contain 4 wavy salmon bags, 1 dark teal bag, 4 pale yellow bags.
+drab aqua bags contain 1 vibrant red bag.
+pale silver bags contain 4 light lavender bags, 2 mirrored bronze bags, 1 striped teal bag.
+dark blue bags contain 3 dull beige bags, 4 faded salmon bags, 1 dull black bag, 5 posh salmon bags.
+plaid tan bags contain 1 plaid lavender bag, 5 pale lavender bags, 4 light aqua bags.
+posh tan bags contain 3 dotted lime bags.
+drab maroon bags contain 5 mirrored chartreuse bags.
+dim magenta bags contain 1 pale fuchsia bag, 2 light fuchsia bags, 5 bright bronze bags, 1 faded gray bag.
+shiny purple bags contain 2 pale chartreuse bags.
+drab turquoise bags contain 4 light turquoise bags.
+light bronze bags contain 2 posh black bags, 3 dark yellow bags, 3 faded plum bags.
+plaid gold bags contain 4 dark teal bags, 4 shiny plum bags.
+dim maroon bags contain 2 clear plum bags, 3 striped aqua bags, 2 striped teal bags.
+drab coral bags contain 3 faded chartreuse bags, 2 drab plum bags, 3 faded red bags, 1 dark blue bag.
+faded gray bags contain 3 pale gray bags, 2 dull beige bags, 5 wavy indigo bags.
+dotted magenta bags contain 2 light salmon bags.
+light magenta bags contain 3 posh yellow bags, 3 dotted green bags, 1 drab violet bag.
+dotted cyan bags contain 2 faded plum bags.
+dim orange bags contain 5 light brown bags, 5 bright yellow bags.
+posh teal bags contain 1 faded beige bag, 5 mirrored gold bags, 5 bright teal bags.
+dim purple bags contain 2 light silver bags, 5 muted red bags, 1 mirrored gold bag, 2 posh orange bags.
+shiny tomato bags contain 3 striped coral bags, 3 dark plum bags, 5 plaid turquoise bags.
+vibrant olive bags contain 3 vibrant lime bags, 5 mirrored white bags, 1 pale bronze bag, 2 striped cyan bags.
+dull lavender bags contain 5 muted gold bags, 5 pale maroon bags.
+light black bags contain 1 dark plum bag, 1 shiny gold bag.
+bright magenta bags contain 3 striped turquoise bags, 3 dim gray bags.
+drab tomato bags contain 3 vibrant purple bags, 4 shiny purple bags, 2 light maroon bags.
+posh turquoise bags contain 2 bright aqua bags, 2 striped salmon bags, 5 muted green bags.
+dotted yellow bags contain 3 dark red bags, 3 wavy gold bags.
+plaid lavender bags contain 4 striped turquoise bags, 1 dotted olive bag, 1 clear green bag, 4 shiny beige bags.
+drab black bags contain 5 dotted magenta bags, 2 drab yellow bags, 2 striped turquoise bags, 1 dark bronze bag.
+clear beige bags contain 4 striped salmon bags.
+light lavender bags contain 1 wavy silver bag, 1 dark indigo bag.
+posh red bags contain 4 muted olive bags, 3 light tan bags, 4 clear gray bags, 2 dim lime bags.
+clear coral bags contain 3 light lime bags, 2 posh violet bags.
+plaid salmon bags contain 2 pale yellow bags, 5 dark plum bags.
+pale gold bags contain 2 striped teal bags, 3 faded crimson bags.
+wavy red bags contain 4 faded green bags, 5 dim coral bags, 4 wavy silver bags, 4 plaid brown bags.
+faded white bags contain 2 posh tomato bags, 1 posh green bag, 4 vibrant lavender bags.
+dull indigo bags contain 3 muted olive bags, 4 shiny purple bags, 3 drab chartreuse bags, 1 dotted orange bag.
+wavy green bags contain 3 pale indigo bags, 1 striped purple bag, 5 dotted coral bags, 1 shiny tan bag.
+shiny red bags contain 4 pale fuchsia bags, 2 posh salmon bags.
+vibrant cyan bags contain 1 faded salmon bag, 1 faded black bag, 4 striped coral bags.
+dark tomato bags contain 3 clear maroon bags, 4 plaid maroon bags, 5 dotted aqua bags.
+vibrant gold bags contain 1 shiny fuchsia bag.
+dark black bags contain 2 wavy lime bags, 1 pale cyan bag, 4 posh brown bags.
+posh fuchsia bags contain 4 pale purple bags, 2 dull lavender bags.
+light silver bags contain 2 vibrant plum bags, 2 pale magenta bags, 4 pale chartreuse bags, 3 plaid chartreuse bags.
+dark yellow bags contain 1 dotted crimson bag, 3 faded orange bags, 5 posh teal bags, 1 clear plum bag.
+mirrored turquoise bags contain 2 muted teal bags.
+drab purple bags contain 5 dotted plum bags, 1 plaid plum bag.
+dotted tan bags contain 1 pale plum bag, 1 dotted aqua bag.
+drab bronze bags contain 4 vibrant red bags, 4 light blue bags.
+mirrored cyan bags contain 1 dark white bag, 4 dark lime bags, 5 vibrant silver bags.
+shiny aqua bags contain 5 wavy plum bags, 4 drab maroon bags, 2 drab chartreuse bags.
+striped aqua bags contain 1 plaid blue bag, 1 dark plum bag, 4 faded lavender bags.
+dotted plum bags contain 5 mirrored green bags, 1 dark plum bag, 4 dark maroon bags.
+faded gold bags contain 4 pale yellow bags.
+vibrant beige bags contain 2 light lavender bags, 3 faded indigo bags.
+light brown bags contain 3 drab brown bags, 4 dark violet bags, 3 faded indigo bags.
diff --git a/2020/day7/inside_shiny.py b/2020/day7/inside_shiny.py
new file mode 100644
index 0000000..00df40b
--- /dev/null
+++ b/2020/day7/inside_shiny.py
@@ -0,0 +1,45 @@
+import networkx as nx
+import re
+
+
+def fits_in(root):
+    """recursively count the number of bags that fit in other bags
+
+    :root: the node to count bags from
+    :returns: total
+
+    """
+    total = 1
+    for neighbour in bagtree[root]:
+        total += int(bagtree[root][neighbour]["weight"]) * fits_in(neighbour)
+    return total
+
+
+bagtree = nx.DiGraph()
+bagremover = re.compile(r" bags?\.?$")
+countandbag = re.compile(r"(\d+) (\w+ \w+)")
+
+with open("input", "r") as baglines:
+    for line in baglines:
+        (miniroot, child_str) = list(map(str.strip, line.split("contain")))
+
+        miniroot = miniroot.replace(" bags", "")
+
+        children = list(
+            map(
+                lambda a: re.sub(bagremover, "", a),
+                list(map(str.strip, child_str.split(","))),
+            )
+        )
+
+        if "no other" in children:
+            continue
+
+        for kid in children:
+            matches = re.match(countandbag, kid)
+            bagtree.add_edge(miniroot, matches.groups()[1], weight=matches.groups()[0])
+
+lengths = dict(nx.all_pairs_shortest_path(bagtree))
+
+# we don't count the shiny gold itself
+print(fits_in("shiny gold") - 1)
diff --git a/2020/day8/gamechild.py b/2020/day8/gamechild.py
new file mode 100644
index 0000000..3763c78
--- /dev/null
+++ b/2020/day8/gamechild.py
@@ -0,0 +1,55 @@
+boot_code = list()
+
+
+def gameon(acc, cx, sf):
+    """emulates the game until a loop or the end"""
+
+    while cx not in sf:
+        sf.add(cx)
+
+        if cx == len(boot_code):
+            print(acc)
+            exit(0)
+
+        if boot_code[cx][0] == "acc":
+            acc += boot_code[cx][1]
+        elif boot_code[cx][0] == "jmp":
+            cx += boot_code[cx][1] - 1
+        else:  # nop
+            pass
+
+        cx += 1
+
+
+with open("input", "r") as file:
+    for line in file:
+        line = line.strip()
+        oparg = line.split(" ")
+        boot_code.append((oparg[0], int(oparg[1])))
+
+
+cursor = 0
+accumulator = 0
+sofar = set()
+
+# we are allowed to keep a 'main' branch and keep jmp/nops separate because
+# task calls for only one instruction change over the whole code
+
+while cursor not in sofar:
+    sofar.add(cursor)
+
+    if boot_code[cursor][0] == "acc":
+        accumulator += boot_code[cursor][1]
+    elif boot_code[cursor][0] == "jmp":
+        # one for the jmp
+        gameon(accumulator, cursor + boot_code[cursor][1], sofar.copy())
+        # one for the nop
+        gameon(accumulator, cursor + 1, sofar.copy())
+        cursor += boot_code[cursor][1] - 1
+    elif boot_code[cursor][0] == "nop":
+        # one for the nop
+        gameon(accumulator, cursor + 1, sofar.copy())
+        # one for the jmp
+        gameon(accumulator, cursor + boot_code[cursor][1], sofar.copy())
+
+    cursor += 1
diff --git a/2020/day8/handheld.py b/2020/day8/handheld.py
new file mode 100644
index 0000000..6197a2f
--- /dev/null
+++ b/2020/day8/handheld.py
@@ -0,0 +1,27 @@
+boot_code = list()
+with open("input", "r") as file:
+    for line in file:
+        line = line.strip()
+        oparg = line.split(" ")
+        boot_code.append((oparg[0], int(oparg[1])))
+
+
+cursor = 0
+
+accumulator = 0
+
+sofar = set()
+
+while cursor not in sofar:
+    sofar.add(cursor)
+
+    if boot_code[cursor][0] == "acc":
+        accumulator += boot_code[cursor][1]
+    elif boot_code[cursor][0] == "jmp":
+        cursor += boot_code[cursor][1] - 1
+    else:
+        pass
+
+    cursor += 1
+
+print(accumulator)
diff --git a/2020/day8/input b/2020/day8/input
new file mode 100644
index 0000000..a73cabd
--- /dev/null
+++ b/2020/day8/input
@@ -0,0 +1,642 @@
+acc +40
+acc -14
+nop +386
+jmp +262
+acc -4
+nop +25
+jmp +500
+acc +13
+acc -1
+acc -7
+acc +37
+jmp +319
+acc +46
+jmp +429
+acc -4
+acc -8
+jmp +335
+acc +12
+jmp +78
+acc +16
+acc -11
+nop +137
+acc +41
+jmp +210
+jmp +83
+acc +7
+jmp +48
+nop +374
+acc +11
+jmp +268
+acc +1
+acc -17
+acc +15
+jmp +178
+acc +23
+jmp -5
+jmp +374
+acc +8
+acc +5
+nop +231
+jmp +1
+jmp -22
+acc +44
+acc +39
+jmp +415
+acc +44
+acc -8
+acc -10
+jmp +36
+nop +385
+acc +6
+jmp -37
+nop +245
+acc +5
+jmp +261
+acc -3
+jmp +23
+acc +37
+jmp +532
+acc -18
+acc -8
+nop +405
+jmp +499
+acc -1
+acc +3
+acc +47
+acc +38
+jmp +67
+jmp -9
+acc +16
+acc -4
+acc +23
+acc +6
+jmp -14
+jmp +229
+nop +235
+acc +3
+acc +17
+jmp +521
+acc +49
+acc -8
+acc +10
+jmp +103
+jmp +75
+acc +22
+nop +527
+acc +36
+acc +32
+jmp -46
+nop +434
+jmp +447
+jmp +159
+acc +37
+acc -19
+acc +39
+jmp +181
+jmp +1
+jmp +162
+jmp +1
+acc +0
+acc +0
+acc +34
+jmp +241
+acc +42
+acc +12
+jmp -75
+jmp -70
+acc +42
+acc -4
+acc +49
+jmp +456
+jmp +277
+jmp +302
+acc +45
+acc +19
+nop -41
+jmp +318
+jmp +153
+acc +9
+nop +323
+jmp -113
+nop -9
+jmp +1
+acc +37
+acc +12
+jmp +448
+acc +3
+acc +38
+jmp -114
+acc +7
+jmp +180
+acc -5
+acc -10
+jmp +117
+jmp +320
+acc +9
+jmp +330
+acc +18
+jmp +1
+jmp +330
+nop +450
+acc +10
+jmp +22
+acc +44
+jmp +298
+acc +38
+nop +433
+acc +1
+jmp +431
+jmp +339
+nop +251
+jmp -126
+nop +191
+jmp +294
+acc -7
+acc +30
+acc -15
+jmp +400
+jmp +441
+acc +5
+acc +17
+nop +35
+nop +103
+jmp +410
+nop -122
+acc +35
+jmp +73
+acc -13
+jmp +291
+acc -11
+jmp +95
+acc -12
+acc +19
+acc -16
+acc +34
+jmp +140
+acc -15
+acc +6
+acc -4
+jmp +190
+acc +11
+acc +0
+acc +19
+acc +43
+jmp +167
+acc +29
+nop +371
+jmp +1
+jmp -36
+acc +20
+acc +20
+acc +26
+jmp +374
+jmp -76
+acc +20
+jmp +115
+acc +13
+acc +25
+acc +39
+jmp -115
+acc -18
+nop -64
+jmp +133
+acc -18
+acc +32
+nop -198
+jmp -157
+acc +6
+acc +41
+nop +36
+jmp -136
+jmp +1
+jmp +41
+acc -14
+acc -17
+acc +1
+jmp +280
+jmp +1
+jmp +72
+acc +7
+jmp +1
+acc -12
+acc -8
+jmp +291
+acc -13
+acc +36
+acc +0
+jmp +97
+acc +20
+acc +0
+acc +12
+acc -16
+jmp -196
+nop +342
+jmp -122
+acc +21
+nop -33
+acc +38
+jmp +285
+acc -9
+acc -17
+acc -2
+acc +25
+jmp +232
+jmp +146
+jmp +312
+acc +11
+nop -54
+nop +351
+jmp -46
+acc +27
+jmp -244
+jmp +262
+acc +42
+acc +5
+nop +4
+acc +20
+jmp +239
+jmp -62
+nop -147
+jmp -169
+acc -12
+acc +40
+acc +29
+jmp +178
+nop +310
+jmp +49
+acc -18
+acc +5
+jmp +297
+jmp +244
+acc +31
+acc +21
+acc +47
+acc +41
+jmp +76
+acc +29
+acc +22
+acc +16
+jmp -121
+jmp -244
+acc +45
+acc -9
+acc +36
+acc +5
+jmp +265
+acc +13
+acc +47
+acc -11
+jmp +338
+acc +0
+jmp +85
+acc +18
+acc +27
+jmp +1
+acc +43
+jmp +227
+jmp +276
+acc +42
+nop +52
+acc -15
+nop +311
+jmp -199
+acc +45
+jmp +286
+acc -8
+acc +7
+acc +9
+acc -18
+jmp -273
+acc +50
+jmp +239
+nop +31
+acc +16
+jmp -162
+acc +12
+nop -204
+acc +27
+jmp -166
+acc -4
+acc +38
+acc +50
+nop +120
+jmp +243
+acc +29
+jmp -300
+acc +0
+nop +179
+acc -6
+jmp -136
+nop -305
+acc +15
+jmp -136
+acc -6
+jmp +172
+jmp +41
+acc -7
+nop +81
+jmp +199
+jmp +54
+acc +1
+acc +25
+jmp -283
+nop -132
+acc +47
+jmp +239
+acc +45
+acc -14
+acc +1
+acc +0
+jmp +10
+acc -15
+nop -338
+nop -257
+jmp +1
+jmp -218
+acc +36
+acc +33
+acc +28
+jmp -230
+acc -5
+acc -14
+jmp +1
+jmp -87
+acc +48
+nop +141
+nop +224
+acc +42
+jmp +22
+nop +140
+acc +16
+jmp +1
+acc +16
+jmp -92
+acc +37
+jmp -368
+acc +27
+jmp +155
+acc +11
+nop +196
+acc +5
+jmp -269
+nop -92
+jmp -276
+acc +46
+acc +6
+acc +34
+jmp -258
+jmp +2
+jmp +80
+jmp +36
+acc +20
+jmp -181
+nop -54
+acc +48
+nop +166
+nop +165
+jmp -263
+acc +47
+acc +33
+jmp +54
+nop -216
+acc +37
+acc +19
+jmp -349
+acc +12
+nop -156
+nop +7
+acc -5
+jmp -390
+acc -10
+jmp -315
+nop -393
+jmp -89
+jmp +1
+jmp -312
+acc +4
+jmp -120
+acc -2
+nop +23
+acc +42
+acc +28
+jmp -205
+acc +43
+acc +6
+jmp -49
+acc -13
+acc +1
+acc +10
+acc +19
+jmp -394
+acc -15
+acc +0
+jmp -365
+acc +23
+acc -17
+nop +23
+acc +0
+jmp -37
+acc +9
+acc +31
+jmp -7
+jmp -278
+nop +147
+acc +5
+acc +43
+jmp -149
+nop -65
+acc +19
+acc +46
+jmp +59
+acc +29
+nop +169
+jmp +131
+acc +43
+acc +50
+jmp +10
+acc -4
+jmp -390
+acc +24
+jmp -236
+acc +10
+acc +19
+nop -160
+acc +32
+jmp +162
+acc +29
+jmp +170
+jmp -14
+acc +36
+jmp -88
+acc +2
+acc +1
+acc +1
+jmp -86
+nop +48
+acc +21
+jmp -356
+acc +0
+nop -321
+nop -247
+nop +127
+jmp -279
+jmp +40
+acc +23
+acc +47
+acc +6
+jmp -438
+acc +26
+acc +35
+nop +120
+acc +2
+jmp -58
+acc +30
+acc +2
+jmp +42
+acc +8
+acc +24
+acc +9
+acc +19
+jmp -351
+acc +40
+acc +18
+acc +43
+acc +29
+jmp +9
+jmp +1
+jmp -210
+jmp -82
+acc +41
+acc +45
+jmp -28
+nop -395
+jmp +71
+acc +38
+acc -13
+nop -251
+acc -9
+jmp -366
+acc +34
+acc +7
+acc -7
+jmp -212
+acc +6
+acc +24
+acc +1
+acc -11
+jmp +94
+acc +20
+acc -14
+acc -5
+jmp +81
+acc +37
+jmp +77
+acc -15
+nop -486
+jmp +39
+jmp +1
+acc +39
+acc +49
+jmp -371
+acc +5
+nop -446
+jmp -267
+acc +39
+jmp +67
+acc +35
+acc +8
+nop -419
+jmp -53
+acc +20
+acc -9
+acc +46
+acc +30
+jmp -136
+acc +35
+jmp +56
+jmp +70
+acc +13
+acc +48
+jmp -290
+acc -18
+acc +48
+acc +50
+jmp -225
+jmp -226
+acc +34
+jmp -391
+acc +49
+nop -324
+acc -10
+acc +41
+jmp -130
+jmp +6
+jmp -555
+acc -17
+jmp -433
+acc +33
+jmp -64
+jmp -476
+nop -138
+nop -556
+acc +47
+jmp +27
+jmp -78
+acc -16
+acc -4
+acc -3
+acc +48
+jmp -292
+acc +43
+acc +3
+acc +44
+jmp +15
+acc +49
+acc +5
+acc +4
+acc +27
+jmp -491
+acc +6
+acc +38
+acc +31
+nop -70
+jmp -379
+acc +0
+acc +2
+acc +49
+jmp -297
+jmp -405
+jmp -72
+jmp -371
+jmp -115
+acc +7
+acc -15
+acc -9
+jmp -486
+acc +3
+acc +16
+nop -19
+acc +14
+jmp -296
+jmp -233
+acc +40
+nop -342
+nop -58
+acc -9
+jmp -316
+acc +4
+acc +15
+acc +14
+acc +50
+jmp -296
+acc -11
+acc +14
+acc +43
+acc +38
+jmp -391
+acc +43
+acc +25
+acc -5
+acc +27
+jmp +1
diff --git a/2020/day9/input b/2020/day9/input
new file mode 100644
index 0000000..c27e1a4
--- /dev/null
+++ b/2020/day9/input
@@ -0,0 +1,1000 @@
+30
+17
+44
+5
+10
+33
+19
+31
+22
+25
+39
+49
+1
+26
+38
+36
+14
+27
+15
+50
+28
+41
+20
+34
+18
+6
+24
+16
+11
+81
+7
+8
+63
+65
+58
+9
+109
+10
+13
+26
+86
+17
+57
+32
+14
+15
+42
+22
+21
+30
+40
+39
+28
+37
+20
+16
+18
+24
+19
+23
+35
+33
+25
+56
+29
+31
+34
+92
+75
+64
+61
+36
+38
+41
+42
+78
+43
+39
+44
+48
+37
+97
+59
+55
+62
+58
+106
+105
+79
+60
+87
+93
+73
+114
+74
+75
+149
+116
+99
+108
+82
+76
+162
+81
+110
+118
+150
+113
+220
+120
+131
+133
+213
+134
+142
+147
+148
+196
+221
+156
+151
+157
+181
+175
+242
+158
+186
+214
+384
+233
+231
+244
+251
+253
+254
+352
+467
+276
+281
+347
+304
+299
+308
+313
+307
+309
+315
+475
+783
+389
+575
+400
+445
+464
+477
+482
+624
+504
+851
+622
+1079
+923
+1251
+704
+603
+606
+795
+620
+1158
+616
+773
+715
+789
+1477
+834
+1794
+845
+909
+941
+986
+1318
+1695
+1981
+1209
+1219
+1222
+1223
+1226
+1307
+2304
+2012
+1236
+1549
+1331
+1786
+1488
+1504
+2649
+2272
+1679
+3183
+2727
+2131
+2177
+2195
+2428
+2431
+3667
+2432
+2445
+2905
+3874
+2543
+2567
+2724
+2785
+4862
+3932
+3635
+2992
+3167
+4584
+4563
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diff --git a/2020/day9/xmas_encoder.pl b/2020/day9/xmas_encoder.pl
new file mode 100644
index 0000000..4fdcb9b
--- /dev/null
+++ b/2020/day9/xmas_encoder.pl
@@ -0,0 +1,70 @@
+use strict;
+use warnings;
+use DDP;
+use Smart::Comments;
+use Tie::File;
+use List::Util qw(min max);
+
+tie my @xmas, 'Tie::File', "input" or die "no input present, $!";
+
+my %preamble;
+# because it's easier this way trust me
+my @also_queue;
+my $goalnum;
+
+foreach my $idx (0 .. $#xmas) {
+    if ($idx < 25) {
+        my $t = int($xmas[$idx]);
+        $preamble{$t} = 1;
+        push @also_queue, $t;
+    } else {
+        my $nextnum = int($xmas[$idx]);
+        my $tester = 0;
+        foreach my $num (keys %preamble) {
+            $tester++;
+            if (exists $preamble{$nextnum - $num}) {
+                my $old = shift @also_queue;
+                delete $preamble{$old};
+                push @also_queue, $nextnum;
+                $preamble{$nextnum} = 1;
+                last;
+            }
+        }
+
+        if (not scalar grep { $_ == $nextnum } @also_queue) {
+            $goalnum = $nextnum;
+            print("XMAS weak num: $goalnum\n");
+            last;
+        }
+    }
+}
+
+# find the contiguous set
+
+my @contiguous;
+my $total = 0;
+
+foreach my $curr (@xmas) {
+    if ($total + $curr < $goalnum) {
+        $total += $curr;
+        push @contiguous, $curr;
+    } elsif ($total + $curr > $goalnum) {
+        while ($total + $curr > $goalnum) {
+            my $evictee = shift @contiguous;
+            if (not defined $evictee) {
+                last;
+            }
+            $total -= $evictee;
+        }
+        push @contiguous, $curr;
+        $total += $curr;
+    }
+
+    if ($total == $goalnum) {
+        print(min(@contiguous) + max(@contiguous));
+        p @contiguous;
+        exit;
+    }
+}
+
+untie @xmas;
diff --git a/2021/day5/Cargo.toml b/2021/day5/Cargo.toml
new file mode 100644
index 0000000..f9b62bf
--- /dev/null
+++ b/2021/day5/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day5"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/2021/day5/input b/2021/day5/input
new file mode 100644
index 0000000..45eb5f4
--- /dev/null
+++ b/2021/day5/input
@@ -0,0 +1,500 @@
+957,596 -> 957,182
+763,144 -> 69,144
+761,794 -> 911,944
+510,440 -> 147,440
+859,33 -> 859,409
+602,518 -> 748,518
+980,545 -> 676,241
+60,528 -> 616,528
+37,242 -> 37,892
+216,966 -> 216,120
+372,910 -> 372,307
+688,864 -> 94,864
+691,17 -> 167,17
+989,928 -> 989,816
+207,84 -> 982,84
+890,714 -> 502,326
+286,329 -> 686,329
+959,62 -> 460,62
+840,82 -> 780,82
+960,12 -> 14,958
+418,45 -> 983,610
+318,264 -> 988,934
+458,11 -> 861,11
+805,197 -> 380,622
+261,907 -> 261,734
+409,617 -> 826,617
+285,457 -> 759,931
+104,241 -> 913,241
+781,141 -> 781,671
+48,956 -> 348,956
+921,517 -> 974,517
+565,621 -> 724,621
+381,276 -> 381,59
+82,25 -> 946,25
+978,16 -> 17,977
+850,438 -> 125,438
+313,850 -> 313,195
+789,963 -> 789,29
+110,156 -> 241,156
+925,974 -> 458,974
+93,153 -> 696,756
+748,312 -> 120,312
+566,367 -> 360,367
+687,295 -> 687,284
+219,925 -> 180,925
+59,952 -> 59,140
+641,333 -> 361,53
+158,587 -> 158,96
+857,278 -> 857,195
+653,45 -> 34,664
+639,384 -> 814,384
+67,24 -> 902,859
+850,278 -> 850,448
+342,505 -> 342,287
+504,924 -> 536,956
+408,666 -> 408,310
+747,347 -> 747,176
+766,468 -> 54,468
+283,905 -> 283,421
+476,334 -> 476,59
+490,935 -> 753,672
+385,772 -> 940,772
+907,316 -> 853,370
+144,717 -> 746,115
+741,819 -> 230,819
+524,397 -> 524,237
+411,824 -> 288,824
+160,719 -> 744,135
+252,550 -> 440,738
+902,64 -> 902,422
+392,194 -> 955,757
+937,735 -> 937,446
+292,49 -> 985,49
+899,464 -> 481,46
+304,369 -> 648,369
+247,723 -> 247,697
+665,941 -> 185,461
+548,25 -> 446,127
+663,558 -> 154,558
+52,47 -> 872,867
+983,68 -> 983,795
+492,705 -> 654,867
+82,888 -> 33,888
+550,443 -> 229,764
+868,508 -> 375,15
+120,829 -> 652,829
+787,296 -> 814,296
+705,643 -> 351,643
+52,23 -> 558,23
+390,92 -> 390,393
+713,520 -> 897,520
+280,481 -> 827,481
+599,181 -> 599,235
+483,140 -> 773,140
+571,227 -> 571,779
+830,45 -> 830,745
+617,745 -> 449,745
+89,176 -> 841,928
+358,868 -> 906,320
+897,669 -> 654,669
+717,729 -> 123,135
+305,330 -> 305,598
+220,964 -> 600,964
+607,715 -> 492,715
+837,561 -> 820,561
+542,38 -> 542,118
+390,970 -> 915,445
+343,160 -> 475,160
+163,60 -> 972,869
+786,500 -> 946,500
+401,393 -> 401,910
+336,962 -> 528,962
+520,489 -> 520,525
+558,584 -> 363,584
+786,880 -> 584,678
+704,435 -> 153,986
+356,522 -> 235,643
+225,67 -> 229,71
+389,381 -> 55,47
+918,229 -> 332,229
+558,989 -> 558,370
+307,821 -> 307,447
+13,232 -> 742,961
+659,809 -> 467,809
+905,942 -> 456,942
+234,810 -> 234,497
+421,287 -> 643,65
+183,164 -> 312,164
+652,955 -> 977,630
+157,820 -> 853,124
+278,480 -> 278,384
+504,399 -> 298,605
+955,76 -> 798,76
+565,352 -> 109,352
+912,16 -> 66,862
+972,786 -> 235,49
+146,15 -> 146,186
+944,149 -> 497,596
+485,84 -> 762,84
+975,983 -> 16,24
+11,896 -> 887,20
+826,924 -> 126,224
+246,648 -> 158,736
+773,377 -> 582,377
+296,947 -> 378,865
+592,291 -> 592,861
+331,470 -> 16,470
+239,85 -> 705,85
+409,842 -> 409,966
+145,438 -> 145,340
+239,859 -> 239,409
+651,508 -> 314,845
+720,39 -> 176,583
+762,444 -> 762,29
+983,962 -> 60,39
+745,248 -> 91,902
+990,18 -> 990,503
+441,472 -> 441,211
+524,837 -> 248,561
+160,215 -> 842,897
+469,544 -> 989,544
+311,241 -> 103,33
+887,610 -> 746,610
+377,942 -> 377,803
+920,401 -> 823,401
+10,142 -> 10,486
+850,955 -> 850,578
+887,728 -> 887,678
+555,749 -> 84,749
+839,620 -> 32,620
+432,709 -> 432,183
+312,164 -> 859,711
+20,119 -> 739,838
+930,871 -> 324,265
+41,702 -> 41,520
+48,210 -> 794,956
+479,526 -> 479,123
+364,739 -> 364,379
+920,969 -> 73,122
+382,314 -> 382,604
+969,877 -> 129,37
+274,893 -> 52,671
+696,296 -> 696,221
+469,735 -> 626,892
+682,435 -> 682,937
+626,550 -> 626,604
+898,904 -> 898,755
+836,849 -> 445,458
+405,237 -> 405,724
+253,74 -> 908,729
+837,802 -> 597,802
+375,450 -> 316,450
+621,784 -> 314,784
+856,136 -> 188,804
+983,11 -> 29,965
+82,134 -> 752,134
+677,299 -> 573,299
+43,726 -> 43,304
+886,629 -> 886,603
+439,471 -> 74,836
+973,879 -> 122,28
+550,246 -> 497,246
+49,109 -> 816,876
+294,493 -> 271,493
+495,397 -> 495,342
+846,892 -> 881,927
+267,397 -> 72,592
+670,168 -> 22,816
+482,302 -> 482,681
+309,692 -> 453,692
+597,369 -> 597,589
+518,475 -> 633,475
+391,484 -> 493,382
+177,135 -> 139,135
+458,17 -> 825,17
+514,292 -> 272,50
+410,734 -> 142,734
+465,975 -> 542,898
+32,901 -> 346,587
+390,478 -> 571,659
+835,839 -> 189,839
+769,407 -> 769,788
+974,40 -> 103,911
+710,709 -> 246,709
+468,857 -> 343,982
+777,552 -> 951,552
+23,490 -> 346,490
+270,384 -> 855,384
+386,454 -> 166,454
+166,388 -> 319,388
+698,514 -> 698,180
+554,162 -> 528,162
+651,363 -> 879,363
+327,123 -> 327,255
+439,492 -> 719,212
+903,438 -> 903,356
+99,611 -> 99,552
+512,652 -> 45,185
+565,284 -> 565,180
+81,710 -> 637,154
+321,769 -> 164,769
+32,307 -> 32,204
+310,338 -> 310,914
+239,691 -> 357,691
+573,164 -> 559,164
+887,961 -> 693,767
+362,904 -> 362,944
+467,294 -> 236,294
+182,53 -> 182,264
+19,950 -> 951,18
+191,575 -> 440,824
+192,168 -> 690,666
+538,552 -> 891,905
+243,38 -> 243,403
+417,140 -> 417,818
+894,45 -> 726,213
+245,898 -> 245,527
+567,946 -> 567,983
+572,675 -> 363,675
+318,618 -> 735,618
+616,580 -> 981,580
+37,881 -> 134,881
+624,675 -> 271,322
+323,686 -> 770,686
+93,385 -> 626,385
+715,382 -> 862,382
+170,342 -> 170,84
+747,221 -> 380,221
+981,311 -> 981,577
+372,186 -> 372,826
+961,91 -> 130,922
+48,603 -> 48,110
+34,975 -> 935,74
+707,18 -> 707,192
+261,149 -> 41,369
+35,589 -> 35,247
+544,522 -> 437,522
+797,712 -> 346,712
+622,47 -> 78,591
+642,390 -> 642,414
+793,29 -> 69,29
+978,905 -> 978,296
+212,515 -> 212,920
+835,166 -> 68,933
+168,742 -> 168,720
+390,276 -> 666,276
+507,792 -> 987,792
+895,242 -> 895,402
+121,950 -> 943,128
+303,336 -> 303,205
+293,390 -> 293,736
+433,963 -> 433,867
+824,327 -> 620,531
+553,689 -> 867,689
+226,984 -> 226,284
+153,308 -> 173,308
+855,959 -> 345,959
+830,895 -> 830,981
+557,63 -> 557,205
+51,857 -> 328,857
+224,243 -> 224,517
+830,773 -> 830,520
+607,210 -> 782,385
+876,330 -> 327,330
+985,11 -> 18,978
+352,936 -> 111,936
+900,39 -> 986,39
+10,626 -> 10,795
+369,942 -> 11,942
+136,770 -> 654,252
+209,541 -> 209,557
+69,671 -> 848,671
+811,451 -> 194,451
+149,46 -> 850,747
+704,386 -> 704,953
+117,346 -> 387,346
+238,701 -> 688,251
+789,220 -> 789,815
+967,512 -> 967,213
+641,652 -> 151,162
+91,942 -> 312,942
+42,226 -> 801,985
+166,37 -> 603,37
+854,976 -> 951,976
+392,23 -> 772,23
+299,196 -> 299,288
+514,560 -> 844,890
+618,699 -> 348,429
+604,947 -> 604,735
+189,851 -> 407,633
+907,719 -> 907,449
+167,421 -> 864,421
+491,383 -> 538,383
+939,504 -> 939,433
+78,649 -> 78,975
+817,246 -> 322,741
+395,195 -> 205,195
+872,275 -> 872,500
+196,621 -> 280,621
+634,619 -> 634,422
+395,30 -> 395,232
+895,628 -> 619,904
+58,66 -> 186,194
+626,477 -> 708,559
+747,712 -> 747,28
+935,798 -> 220,798
+459,530 -> 704,530
+648,679 -> 79,110
+778,135 -> 778,66
+657,352 -> 906,352
+499,160 -> 615,160
+830,226 -> 830,489
+364,971 -> 826,971
+879,923 -> 543,923
+914,984 -> 612,984
+594,810 -> 508,810
+55,467 -> 269,253
+360,478 -> 360,902
+176,890 -> 176,431
+867,121 -> 16,972
+728,876 -> 65,213
+606,112 -> 842,112
+563,532 -> 914,532
+783,139 -> 369,139
+564,359 -> 846,359
+79,326 -> 15,390
+972,419 -> 972,35
+686,839 -> 755,839
+427,856 -> 77,856
+102,410 -> 925,410
+468,177 -> 901,610
+865,249 -> 930,314
+784,447 -> 863,368
+684,708 -> 223,708
+555,228 -> 555,900
+380,600 -> 222,600
+900,408 -> 188,408
+773,677 -> 773,16
+560,287 -> 560,790
+130,851 -> 959,22
+338,951 -> 626,663
+678,726 -> 405,726
+243,469 -> 243,276
+783,486 -> 66,486
+469,536 -> 469,770
+689,148 -> 689,340
+396,689 -> 396,673
+848,759 -> 848,770
+965,775 -> 965,605
+889,907 -> 284,302
+161,169 -> 942,950
+619,267 -> 394,492
+323,786 -> 18,481
+953,643 -> 884,643
+371,446 -> 371,252
+890,915 -> 192,217
+674,259 -> 674,247
+877,479 -> 877,117
+620,843 -> 620,734
+597,722 -> 597,939
+935,663 -> 935,469
+108,844 -> 108,596
+211,447 -> 211,482
+123,657 -> 721,59
+774,858 -> 774,86
+978,500 -> 978,305
+152,890 -> 937,105
+728,356 -> 728,261
+354,373 -> 433,452
+586,627 -> 586,949
+764,381 -> 735,410
+986,899 -> 199,112
+251,418 -> 251,596
+897,379 -> 897,388
+149,901 -> 253,901
+650,229 -> 46,229
+446,707 -> 446,44
+953,898 -> 697,898
+772,422 -> 762,432
+608,756 -> 927,756
+138,911 -> 716,333
+414,583 -> 244,583
+219,267 -> 219,751
+69,746 -> 69,886
+444,243 -> 493,194
+604,950 -> 244,950
+450,198 -> 31,617
+918,852 -> 109,43
+967,800 -> 267,100
+388,516 -> 760,516
+656,954 -> 513,954
+80,680 -> 80,44
+360,848 -> 360,800
+10,10 -> 989,989
+889,927 -> 104,142
+882,187 -> 812,187
+416,522 -> 356,522
+797,795 -> 273,271
+175,371 -> 12,371
+726,595 -> 956,595
+852,355 -> 852,357
+959,83 -> 338,83
+822,766 -> 140,84
+968,129 -> 181,916
+17,28 -> 975,986
+15,913 -> 624,304
+589,322 -> 468,443
+894,21 -> 309,606
+83,25 -> 963,905
+143,380 -> 377,146
+587,151 -> 507,151
+257,967 -> 257,882
+770,552 -> 770,573
+128,90 -> 886,848
+456,953 -> 456,669
+930,434 -> 668,434
+501,835 -> 796,540
+36,980 -> 989,27
+494,690 -> 626,690
+105,945 -> 972,78
+409,730 -> 409,62
+901,160 -> 831,90
+881,490 -> 28,490
+736,244 -> 38,942
+295,770 -> 199,770
+866,416 -> 808,416
+875,716 -> 875,189
+763,393 -> 241,915
+583,237 -> 704,237
+29,153 -> 637,153
+767,282 -> 767,107
+456,242 -> 456,165
+455,232 -> 749,232
+54,128 -> 766,840
+901,73 -> 939,73
+928,118 -> 854,118
+15,983 -> 975,23
+600,92 -> 260,92
+247,714 -> 247,490
+511,332 -> 19,824
+55,15 -> 968,928
+246,29 -> 25,29
+22,101 -> 761,840
+876,177 -> 139,914
+165,150 -> 822,807
+258,707 -> 773,707
+68,788 -> 68,875
+858,142 -> 758,142
+719,642 -> 810,642
+928,904 -> 928,338
+287,977 -> 978,286
+883,13 -> 883,31
+681,301 -> 681,957
+762,863 -> 405,506
+194,657 -> 733,118
+78,41 -> 497,41
+840,627 -> 840,168
+335,54 -> 335,822
+136,983 -> 526,593
+120,156 -> 120,630
diff --git a/2021/day5/input.example b/2021/day5/input.example
new file mode 100644
index 0000000..b258f68
--- /dev/null
+++ b/2021/day5/input.example
@@ -0,0 +1,10 @@
+0,9 -> 5,9
+8,0 -> 0,8
+9,4 -> 3,4
+2,2 -> 2,1
+7,0 -> 7,4
+6,4 -> 2,0
+0,9 -> 2,9
+3,4 -> 1,4
+0,0 -> 8,8
+5,5 -> 8,2
diff --git a/2021/day5/input.mini.example b/2021/day5/input.mini.example
new file mode 100644
index 0000000..b775b12
--- /dev/null
+++ b/2021/day5/input.mini.example
@@ -0,0 +1,2 @@
+1,1 -> 3,3
+9,7 -> 7,9
diff --git a/2021/day5/src/main.rs b/2021/day5/src/main.rs
new file mode 100644
index 0000000..498deb0
--- /dev/null
+++ b/2021/day5/src/main.rs
@@ -0,0 +1,95 @@
+use std::cmp::{max, min};
+use std::collections::HashMap;
+use std::env;
+use std::fs::File;
+use std::io::{BufRead, BufReader};
+
+fn main() {
+    let reader = open_file();
+
+    let mut coords: HashMap<(i32, i32), i32> = HashMap::new();
+
+    for line in reader.lines() {
+        if let Ok(line) = line {
+            let vents = line.split(" -> ").collect::<Vec<&str>>();
+            let first = vents[0].split(",").collect::<Vec<&str>>();
+            let second = vents[1].split(",").collect::<Vec<&str>>();
+
+            let first: Vec<i32> = first.into_iter().map(|s| s.parse().unwrap()).collect();
+            let second: Vec<i32> = second.into_iter().map(|s| s.parse().unwrap()).collect();
+
+            let xstep: i32;
+            let ystep: i32;
+            let start_x = min(first[0], second[0]);
+            let end_x = max(first[0], second[0]);
+            let start_y = min(first[1], second[1]);
+            let end_y = max(first[1], second[1]);
+            let distance = max(end_x - start_x, end_y - start_y);
+
+            if first[0] > second[0] {
+                xstep = -1;
+            } else if first[0] < second[0] {
+                xstep = 1;
+            } else {
+                xstep = 0;
+            }
+
+            if first[1] > second[1] {
+                ystep = -1;
+            } else if first[1] < second[1] {
+                ystep = 1;
+            } else {
+                ystep = 0;
+            }
+
+            for step in 0..=distance {
+                let counter = coords
+                    .entry((first[0] + step * xstep, first[1] + step * ystep))
+                    .or_insert(0);
+                *counter += 1;
+            }
+        }
+    }
+
+    // println!("coords: {:?}", coords);
+    // visualize(&coords);
+
+    let result = coords.iter().filter(|(_, &y)| y >= 2).count();
+    println!("{}", result);
+}
+
+fn visualize(map: &HashMap<(i32, i32), i32>) {
+    let start_x = map.iter().map(|((x, _), _)| x).min().unwrap();
+    let start_y = map.iter().map(|((_, y), _)| y).min().unwrap();
+    let end_x = map.iter().map(|((x, _), _)| x).max().unwrap();
+    let end_y = map.iter().map(|((_, y), _)| y).max().unwrap();
+    println!("start_x: {}", start_x);
+    println!("start_y: {}", start_y);
+    println!("end_x: {}", end_x);
+    println!("end_y: {}", end_y);
+
+    for y in *start_y..=*end_y {
+        for x in *start_x..=*end_x {
+            if let Some(val) = map.get(&(x, y)) {
+                print!("{}", val);
+            } else {
+                print!(".")
+            }
+        }
+        println!("");
+    }
+}
+
+fn open_file() -> BufReader<File> {
+    let args: Vec<String> = env::args().collect();
+
+    if args.len() != 2 {
+        eprintln!("Usage: {} <filename>", args[0]);
+        std::process::exit(1);
+    }
+
+    let filename = &args[1];
+
+    let file = File::open(filename).unwrap_or_else(|_| panic!("No such file: {}", filename));
+    BufReader::new(file)
+}
diff --git a/2021/day6/Cargo.toml b/2021/day6/Cargo.toml
new file mode 100644
index 0000000..9957f8b
--- /dev/null
+++ b/2021/day6/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "day6"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+itertools = "0.10.3"
diff --git a/2021/day6/input b/2021/day6/input
new file mode 100644
index 0000000..9bb513a
--- /dev/null
+++ b/2021/day6/input
@@ -0,0 +1 @@
+1,1,3,5,3,1,1,4,1,1,5,2,4,3,1,1,3,1,1,5,5,1,3,2,5,4,1,1,5,1,4,2,1,4,2,1,4,4,1,5,1,4,4,1,1,5,1,5,1,5,1,1,1,5,1,2,5,1,1,3,2,2,2,1,4,1,1,2,4,1,3,1,2,1,3,5,2,3,5,1,1,4,3,3,5,1,5,3,1,2,3,4,1,1,5,4,1,3,4,4,1,2,4,4,1,1,3,5,3,1,2,2,5,1,4,1,3,3,3,3,1,1,2,1,5,3,4,5,1,5,2,5,3,2,1,4,2,1,1,1,4,1,2,1,2,2,4,5,5,5,4,1,4,1,4,2,3,2,3,1,1,2,3,1,1,1,5,2,2,5,3,1,4,1,2,1,1,5,3,1,4,5,1,4,2,1,1,5,1,5,4,1,5,5,2,3,1,3,5,1,1,1,1,3,1,1,4,1,5,2,1,1,3,5,1,1,4,2,1,2,5,2,5,1,1,1,2,3,5,5,1,4,3,2,2,3,2,1,1,4,1,3,5,2,3,1,1,5,1,3,5,1,1,5,5,3,1,3,3,1,2,3,1,5,1,3,2,1,3,1,1,2,3,5,3,5,5,4,3,1,5,1,1,2,3,2,2,1,1,2,1,4,1,2,3,3,3,1,3,5
diff --git a/2021/day6/input.example b/2021/day6/input.example
new file mode 100644
index 0000000..55129f1
--- /dev/null
+++ b/2021/day6/input.example
@@ -0,0 +1 @@
+3,4,3,1,2
diff --git a/2021/day6/src/main.rs b/2021/day6/src/main.rs
new file mode 100644
index 0000000..378764e
--- /dev/null
+++ b/2021/day6/src/main.rs
@@ -0,0 +1,33 @@
+use std::env;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    if args.len() != 2 {
+        eprintln!("Usage: {} <filename>", args[0]);
+        std::process::exit(1);
+    }
+    let mut smart_lanternfish: [u64; 9] = [0; 9];
+
+    let foo: String = std::fs::read_to_string(&args[1]).unwrap().parse().unwrap();
+    let mut lanternfish: Vec<u8> = Vec::new();
+    lanternfish.extend(foo.trim().split(",").map(|x| x.parse::<u8>().unwrap()));
+
+    for initial_fish in &lanternfish {
+        smart_lanternfish[*initial_fish as usize] += 1;
+    }
+
+    // println!("{:?}", smart_lanternfish);
+    for _day in 0..256 {
+        smart_lanternfish.rotate_left(1);
+        smart_lanternfish[6] += smart_lanternfish[8];
+        // println!(
+        //     "After {day:>width$} days: {lanternfish:?}",
+        //     day = _day,
+        //     width = 2,
+        //     lanternfish = smart_lanternfish
+        // );
+    }
+
+    println!("{}", smart_lanternfish.iter().sum::<u64>());
+}