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-rw-r--r--day05.rb21
-rw-r--r--day07.k14
-rw-r--r--day08.k3
-rw-r--r--day08.rb43
-rw-r--r--day09.rb54
-rw-r--r--day11.k6
-rw-r--r--day1234
-rw-r--r--day12.rb79
-rw-r--r--day13150
-rw-r--r--day13.rb137
-rw-r--r--day141
-rw-r--r--day14.rb25
-rw-r--r--day15.rb32
-rw-r--r--day164014
-rw-r--r--day16.rb92
-rw-r--r--day1850
-rw-r--r--day18.rb95
-rw-r--r--day1937
-rw-r--r--day19.rb86
-rw-r--r--day201
-rw-r--r--day20.rb48
-rw-r--r--day2132
-rw-r--r--day21.rb67
-rw-r--r--day222
-rw-r--r--day22.rb34
-rw-r--r--day231000
-rw-r--r--day23.rb21
-rw-r--r--day2423
-rw-r--r--day251315
-rw-r--r--day25.rb34
30 files changed, 7550 insertions, 0 deletions
diff --git a/day05.rb b/day05.rb
new file mode 100644
index 0000000..ce5fd2e
--- /dev/null
+++ b/day05.rb
@@ -0,0 +1,21 @@
+t = s = File.read("day05").chomp
+
+v = ('a'..'z').map { |l| ["#{l}#{l.upcase}", "#{l.upcase}#{l}"] }.flatten
+r = Regexp.union v
+
+p r
+
+while s.gsub!(r, '')
+end
+
+p s.size
+
+# 9687 too high
+
+p ('a'..'z').map { |l|
+ s = t.delete "#{l}#{l.upcase}"
+ while s.gsub!(r, '')
+ end
+ p [l, s.size]
+ s.size
+}.min
diff --git a/day07.k b/day07.k
new file mode 100644
index 0000000..ebb0a13
--- /dev/null
+++ b/day07.k
@@ -0,0 +1,14 @@
+ +(1:`day07)@'/:5,36
+
+/ d[;36]@=(d:1:`day07)[;5]
+m: d[;5]@=(d:1:`day07)[;36]
+
+s: ?(,/m)^m
+
+
+ m: d[;5]@=(d:1:`day07)[;36]
+ m:{x@<x}'m
+
+s: (!m)^(,/m)
+
+/ wrong BDNGEVOQYHLWXPSUAMZJIKRTFC \ No newline at end of file
diff --git a/day08.k b/day08.k
new file mode 100644
index 0000000..4770580
--- /dev/null
+++ b/day08.k
@@ -0,0 +1,3 @@
+d:2 3 0 3 10 11 12 1 1 0 1 99 2 1 1 2
+
+t:{} \ No newline at end of file
diff --git a/day08.rb b/day08.rb
new file mode 100644
index 0000000..a51543b
--- /dev/null
+++ b/day08.rb
@@ -0,0 +1,43 @@
+d=File.read("day08").split.map(&:to_i)
+
+def t(d)
+ return 0 if d.empty?
+
+ len = d.shift
+ md = d.shift
+
+ mds = 0
+ (0...len).map {
+ mds += t(d)
+ }
+ mds += d.shift(md).sum
+end
+
+def s(d)
+ return 0 if d.empty?
+
+ len = d.shift
+ md = d.shift
+
+ mds = (0...len).map {
+ s(d)
+ }
+
+ m = d.shift(md)
+
+ if len == 0
+ m.sum
+ else
+ m.map { |i|
+ if i <=0 || i > mds.size
+ 0
+ else
+ mds[i-1]
+ end
+ }.sum
+ end
+end
+
+p t(d.clone) # 35852
+p s(d.clone) # 33422
+
diff --git a/day09.rb b/day09.rb
new file mode 100644
index 0000000..ed76465
--- /dev/null
+++ b/day09.rb
@@ -0,0 +1,54 @@
+s = [0]
+
+m = 1
+i = 0
+
+mp = 9
+mr = 25
+
+mp = 10
+mr = 1618
+=begin
+
+mp = 13
+mr = 7999
+
+mp, mr = File.read("day09").scan(/\d+/).map(&:to_i)
+mr *= 100 # part 2
+
+p mr
+=end
+
+scores = Hash.new(0)
+
+catch(:done) {
+loop {
+ (1..mp).each { |p|
+ print m, " ", i, " ", s.size, " "
+ p s
+
+ if m % 23 == 0
+ scores[p] += m
+ print "score1 #{p} #{m}\n"
+ i = (i - 8) % s.size
+ print "score2 #{p} #{s[i]}\n"
+ scores[p] += s.delete_at(i)
+
+ i = (i+1)%s.size
+ m += 1
+ else
+ i += 1
+ s.insert(i, m)
+ i = (i+1)%s.size
+ m += 1
+ end
+
+ p m if m % 100000 == 0
+
+ throw :done if m >= mr+1
+ }
+}
+}
+
+p scores
+p scores.values.max # 382055
diff --git a/day11.k b/day11.k
new file mode 100644
index 0000000..e2b88f9
--- /dev/null
+++ b/day11.k
@@ -0,0 +1,6 @@
+d:7857
+v:{{-5+`i$x[2]}@|$r*d+(*|x)*r:*:x+10}''300 300#+!300 300
+","/:'$1_'{x[2,*>x]}@{s::x;({x@*>x}@{(+/(v .)'+x+!2#s),x,s}'+!2#300-s)}'1+!22
+
+/ 243,16
+/ 231,227,14
diff --git a/day12 b/day12
new file mode 100644
index 0000000..1ca818c
--- /dev/null
+++ b/day12
@@ -0,0 +1,34 @@
+initial state: ##.####..####...#.####..##.#..##..#####.##.#..#...#.###.###....####.###...##..#...##.#.#...##.##..
+
+##.## => #
+....# => .
+.#.#. => #
+..### => .
+##... => #
+##### => .
+###.# => #
+.##.. => .
+..##. => .
+...## => #
+####. => .
+###.. => .
+.#### => #
+#...# => #
+..... => .
+..#.. => .
+#..## => .
+#.#.# => #
+.#.## => #
+.###. => .
+##..# => .
+.#... => #
+.#..# => #
+...#. => .
+#.#.. => .
+#.... => .
+##.#. => .
+#.### => .
+.##.# => .
+#..#. => #
+..#.# => .
+#.##. => #
diff --git a/day12.rb b/day12.rb
new file mode 100644
index 0000000..288d34f
--- /dev/null
+++ b/day12.rb
@@ -0,0 +1,79 @@
+s="#..#.#..##......###...###"
+
+t = {
+"...##"=>"#",
+"..#.."=>"#",
+".#..."=>"#",
+".#.#."=>"#",
+".#.##"=>"#",
+".##.."=>"#",
+".####"=>"#",
+"#.#.#"=>"#",
+"#.###"=>"#",
+"##.#."=>"#",
+"##.##"=>"#",
+"###.."=>"#",
+"###.#"=>"#",
+"####."=>"#",
+}
+
+s="##.####..####...#.####..##.#..##..#####.##.#..#...#.###.###....####.###...##..#...##.#.#...##.##.."
+
+t={
+"##.##"=>"#",
+"....#"=>".",
+".#.#."=>"#",
+"..###"=>".",
+"##..."=>"#",
+"#####"=>".",
+"###.#"=>"#",
+".##.."=>".",
+"..##."=>".",
+"...##"=>"#",
+"####."=>".",
+"###.."=>".",
+".####"=>"#",
+"#...#"=>"#",
+"....."=>".",
+"..#.."=>".",
+"#..##"=>".",
+"#.#.#"=>"#",
+".#.##"=>"#",
+".###."=>".",
+"##..#"=>".",
+".#..."=>"#",
+".#..#"=>"#",
+"...#."=>".",
+"#.#.."=>".",
+"#...."=>".",
+"##.#."=>".",
+"#.###"=>".",
+".##.#"=>".",
+"#..#."=>"#",
+"..#.#"=>".",
+"#.##."=>"#",
+}
+
+s = ("."*1000) + s + (".")*1000
+
+r = 0
+(1..1000).each { |i|
+ s = "..#{s}..".chars.each_cons(5).map { |c|
+ t[c.join] || "."
+ }.join
+
+ if i == 20 || i == 500 || i == 1000
+ r = 0
+ s.chars.each_with_index { |c, i|
+ if c == "#"
+ # p i-10
+ r += i-1000
+ end
+ }
+
+ p [i,r]
+ end
+}
+
+# 1000..2000 adds up to 32000
+p r + ((50000000000/1000)-1)*32000 # 1600000032081
diff --git a/day13 b/day13
new file mode 100644
index 0000000..e6855b9
--- /dev/null
+++ b/day13
@@ -0,0 +1,150 @@
+ /------------------------------------------------------------------------------------------\
+ /---------------------+---------------------------------------------\ |
+ /--------------------+---------------------+--------------------------------\ | /------------\ |
+ | | /---+--------------------------------+------------+----------------------+------------+--------+---\
+ |/-------------------+-----------------+---+\ /--------------+---------\ | | | | |
+ /------++-----------\ | | || /---------+\ | | | | | | |
+ | || | | /------+---++------+---------++-------------+---------+--+-----\ | | | |
+ | || | | | |/--++------+---------++-------\ /-+--------\| | | | | | |
+ | || /-------+-------+----------+\ || || | || | | | || | | | | | |
+ | /-++---+-------+-----\ |/---------++-----++--++------+---------++-------+---+-+--------++--+-----+-----------\ | | | |
+ | | || | | | || /---++-----++--++------+---------++-------+---+-+\ || | | | | | | |
+ | | || | | | || | || || || | ||/------+---+-++-------++--+-----+-----------+----+-\ | | |
+ | | || | | | || | || /++--++------+---------+++------+---+-++-------++--+-----+--\ | | | | | |
+ /+----+-++---+-------+-----+-++-----+---++----+++--++->----+---------+++------+-\ | || || | | | | | | | | |
+ || | || |/------+-----+-++-----+---++----+++--++------+---------+++------+-+-+-++-------++--+-----+--+-------\| | | | | |
+ || | || || | | || | || ||| || | ||| | | | || /--++--+-----+--+-------++----+-+---\ | | |
+ || | || || | | || | /-++----+++--++----\ | ||| | | | || | || | | | || | | | | | |
+ || /--+-++---++------+-----+-++-----+-+-++----+++--++----+-+---------+++---\ | | | || | || | | | || | | | | | |
+ || | \-++---++------+-----/ || | | || |||/-++----+-+---------+++---+--+-+-+-++----+--++--+-----+-\| || | | | /---+--------+--\|
+ || | || || | || /+-+-++----++++-++----+-+---------+++---+--+-+-+-++----+--++--+-----+\|| /-++----+-+-\ | | | | ||
+ || | || || | || /-++-+-++----++++-++----+-+---------+++---+--+-+-+-++----+--++--+-----++++-\ | || | | | | | | | ||
+ || | || || | || | || | || |||| || | | ||\---+--+-+-+-++----+--++--+-----++++-+---+-++----+-/ | | | | | ||
+ || | || || | || | || | || |||| || |/+---------++----+--+-+-+-++----+--++--+---\ |||| | | || | | | | /+-------\| ||
+ || | || || | || | || | || |||| || ||| || |/-+-+-+-++----+--++--+---+-++++-+---+-++-\ | | | | || || ||
+ || | || || | || | || | ||/---++++-++----+++---------++----++-+-+-+-++----+--++--+---+-++++-+---+-++-+\ | | | | || || ||
+ || | || || /---+-------++--+-++-+-+++---++++-++----+++---------++----++-+-+-+-++----+--++--+---+-++++-+---+-++-++-+-\ | | | || || ||
+ /++-+----++---++--+---+--\ || | || | ||| |||| || ||| || || | | | || |/-++--+---+-++++-+---+-++-++-+-+-+-+--+--++\ || ||
+ ||| | || || | | | || | || | \++---++++-++----+++---------++----++-+-+-+-++----++-++--+---+-/||| |/--+-++-++-+-+-+-+--+--+++---\ || ||
+ ||| |/---++---++--+---+--+----++\ | || | || |||| || ||| \+----++-+-+-+-++----++-+/ | | ||| || | || || | | | | | ||| | || ||
+ ||| || || /++--+---+--+----+++-+-++-+--++---++++-++----+++----------+----++-+-+-+\|| || | | | ||| ||/-+-++-++-+-+-+-+--+--+++---+--++-\||
+ ||| || || ||| | | | ||| | || | || |||| || ||| /---+----++-+-+-++++----++-+---+---+--+++-+++-+-++-++-+-+-+-+--+-<+++---+\ || |||
+ ||| ||/--++--+++-\| | | ||| | || | || |||\-++----+++------+---+----++-+-+-++++----++-+---+---+--+/| ||| \-++-++-+-+-/ | | ||| || || |||
+ ||| ||| ||/-+++-++-\ | /+----+++-+-++-+--++---+++--++----+++------+---+----++-+-+-++++----++-+---+---+--+-+-+++---++-++\| | | | ||| || || |||
+ ||| ||| ||| ||| || | | || ||| | || | || ||| || /--+++------+---+----++-+\| |||| || | | | | | ||| || |||| | | | ||| || || |||
+ ||| ||| ||| ||| || | | || ||| | || | || |\+--++-+--+++------+---+----++-+++-++++----++-+---+---+--+-+-+++---++-++++-+---+--+--+++->-++-++-++/
+ ||| ||| ||| ||| || | | || ||| | || |/-++---+-+--++-+--+++->----+---+----++-+++-++++----++-+---+---+--+-+-+++---++-++++-+---+\ | ||| || || ||
+ ||| ||| ||| ||| || | | || ||| | || ||/++---+-+--++-+--+++------+---+----++-+++-++++----++-+---+---+--+-+-+++---++-++++-+---++-+--+++---++\|| ||
+ |\+-+++--+++-+++-++-+-+-++----+++-+-++-+++++---+-+--++-+--+++------+---+----++-++/ |||| || | | | | | ||| || |||| | || | ||| ||||| ||
+ | | ||| ||| ||\-++-+-+-++----+++-+-++-+++++---+-+--++-+--+++------+---+----++-++--++++----++-+---+---+--+-+-+++---/| |||| | || | ||| ||||| ||
+ | | ||| ||| ||/-++-+-+-++----+++\| || \++++---+-+--++-+--/|| | | || || |||| || | | | | | ||| | |||| | || | ||| ||||| ||
+ | | ||| ||| ||| || | | || ||||| ||/-++++---+-+--++-+---++------+---+----++-++--++++----++-+---+---+--+-+\||| | |||| | || | ||| ||||| ||
+ | | ||| ||| |||/++-+-+-++--\ ||||| ||| |||| /+-+--++-+---++------+---+----++-++--++++--\ || | | | | ||||| | |||| | || | ||| ||||| ||
+ | | ||| ||| |||||| | | || | ||||| ||| |||| || | || | || | | |\-++--++++--+-++-+---+---+--+-+++++----+-/||| | || | ||| ||||| ||
+ | | ||| ||| |||||^ | | || | ||||| ||| |||| || | \+-+---++------+---+----+--++--++++--+-++-+---+---+--+-+++++----+--+++-+---++-+--+++---++++/ ||
+ |/+-+++--+++-++++++-+-+-++--+-+++++-+++-++++--++-+---+-+---++------+---+----+--++--++++--+-++-+---+---+\ | ||||| | ||| | || | ||| |||| ||
+ ||| ||| ||| |||||| | | || | |||||/+++-++++--++-+---+-+---++------+---+----+--++--++++--+-++-+---+---++-+-+++++\ | ||| | || | ||| |||| ||
+ ||| ||| ||| |||||| | | || | \++++++++-++++--++-+---+-+---++------+---+----+--++--++++--+-++-+---/ || | |||||| | ||| | || | ||| |||| ||
+/-+++-+++--+++-++++++-+-+-++--+--++++++++-++++--++-+---+-+---++------+---+----+--++--++++--+-++-+--\ || | |||||| | ||| | || | ||| |||| ||
+| ||| ||| v|| \+++++-+-+-++--+--++++++++-++++--++-+---+-+---++------+---+----+--++--+/|| | || | | || | |||||| | ||| | || | ||| |||| ||
+| ||| ||| ||| ||||| |/+-++--+--++++++++-++++--++-+---+-+---++------+---+----+--++--+-++-\| || | /+----++-+-++++++---+--+++-+--\|| | ||| |||| ||
+| ||| ||| ||| ||||| ||| || | \+++++++-++++--++-+---+-+---++------+---+----+--++--+-++-++-++-+-++----++-+-++++++---/ ||| | ||| | ||| |||| ||
+| ||\-+++--+++--+++++-++//++--+---+++++++-++++--++-+---+-+---++--\ | | /-+--++--+-++-++-++-+-++--\ || | |||||| ||| | ||| | ||| ||^| ||
+| || ||| \++--+++++-++-+++--+---+++++++-++++--++-+---+-+---++--+---+---+--+-+--++--+-/| || || | || | || | |||||| ||| | ||| | ||| |||| ||
+| || ||| ||/-+++++-++-+++--+---+++++++-++++-\|| | | \---++--+---+---+--+-+--+/ | | || || | || | || | |||||| ||\-+--+++-+--+/| |||| ||
+| || \++---+++-+++++-++-+++--+---+++++++-++++-+++-+---+-----++--+---+---+--+-/ | | | || || | || | || | |||||| ||/-+--+++-+--+-+---++++-\||
+| || || ||| ||||| || ||| | ||||||| |||| ||| | | || | |/--+--+----+-\ | | || || | || | || | ||||\+------+++-+--+++-+--+-+---++++-+/|
+| || || ||| ||||| || ||| | ||||||| |||| ||| | | || | || |/-+----+-+-+--+-++-++-+-++--+-++-+-++++-+------+++-+--+++\| | | |||| | |
+| || || ||| ||||| || ||| /+---+++++++-++++-+++-+---+-----++--+---++--++-+----+-+-+\ | || || | || | || | |||| | ||| | ||||| | | |||| | |
+| || || /+++-+++++-++-+++-++---+++++++-++++-+++-+---+-----++--+---++--++-+----+-+-++-+-++-++-+\|| | || | |||| | /----+++-+\ ||||| | | |||| | |
+| || ||/-++++-+++++-++-+++-++-\ ||||||| |||| |||/+---+-----++--+---++--++-+----+-+-++-+-++\\+-++++--+-++-+-++++-+-+----+++-++-+/||| | | |||| | |
+| || ||| |||| ||\++-++-+++-+/ | ||||||| |||| ||||| | /---++--+--\|| || | | | || | ||| | |||| | || | |||| | | ||| || | ||| | | |||| | |
+| || ||| |||| || || || ||| | | ||||||| |||| ||||| | | || | ||| || | | | \+-+-+++-+-/||| | || | |||| | ^ ||| || | ||\--+-+---++++-+-/
+| || ||| |||| || || || ||| | | |||||||/++++-+++++---+-+---++--+--+++--++-+----+-+--+-+-+++-+--+++--+-++-+-++++-+-+----+++-++-+\|| | | |||| |
+| || ||| |||| || || || ||| | | |||||||||||| ||||| | | || | ||| || | | | | | ||| | ||| | || | |||| | | ||| || |||| | | |||| |
+| || ||| |||| || || || ||| | /+-++++++++++++-+++++---+-+---++--+--+++--++-+----+-+--+-+-+++-+--+++--+-++-+-++++-+-+----+++-++-++++--\| | |||| |
+| || |\+-++++-++-/| || ||| | || |||||||||||| ||||| | | ||/-+--+++--++-+----+-+--+-+-+++-+--+++--+-++-+-++++-+-+--\ ||| || |||| || | |||| |
+| || | | |||| || | || ||| | || |||||\++++++-+++++---+-+---+++-+--+++--++-+----+-+--+-/ ||| | ||| | || | |||| | | | ||| || |||| || | |||| |
+| || | | |||| || | || \++-+-++-+++++-++++++-+++++---+-+---+++-/ ||| || | | | | ||| | ||| | || | |||| | | | ||| || |||| || | |||| |
+| || | | |||| || | || \+-+-++-+++++-++++++-+++++---+-+---+++----+++--++-+----+-+--+---+++-+--+++--+-++-+-++++-+-+--+-+/| || |||| || | |||| |
+| || | | |||\-++--+-++---+-+-++-+++++-++++++-/|||| | | ||| ||| || | | | | ||| | ||| | || | |||| | | | | | || |||| || | |||| |
+| || | | ||\--++--+-/| | | || ||||| |||||| |||| | | ||| /+++--++-+----+-+--+---+++-+--+++--+-++-+-++++-+\| | | | || |||| || | |||| |
+| || /-+-+-++---++--+--+---+-+-++-+++++-++++++--++++---+-+---+++---++++--++-+----+-+--+---+++-+--+++-\| || | |||\-+++--+-+-+-++-++++--++-+---/||| |
+| || | | | || || | | /-+-+-++-+++++-++++++--++++---+-+---+++---++++--++-+----+-+-\| ||| | ||| || || | |v| ||| | | | || |||| || | ||| |
+| || | | | ||/--++--+--+-+-+-+-++-+++++\|||||| |||| | | ||| |||| || | | | || ||| | ||| || || | ||| ||| | | | || |||| || | ||| |
+| || |/+-+-+++--++--+--+-+-+-+-++-++++++++++++--++++---+-+\ /+++---++++--++-+----+-+-++---+++-+--+++-++-++-+-+++--+++--+-+-+-++-++++--++-+---\||| |
+| || ||| | ||| || | | | | \-++-++++++++++++--++++---+-++-++++---++++--++-+----+-+-+/ ||| | ||| || || | ||| ||| | | | || |||| || | |||| |
+| || ||| | \++--++--+--+-+-+---++-++++++++++++--++++---+-++-++++---++++--++-+----+-+-+----+++-+--/|| || || | ||| ||| | | | || |||| || | |||| |
+| || ||| | || || |/-+-+-+---++-++++++++++++--++++---+-++-++++---++++--++-+----+-+-+---\||| | || || || | ||| ||| | | | || |||| || | |||| |
+| || ||| | || || || | | | || |||||||||||| ||\+---+-++-++++---++++--++-+----+-+-+---+++/ | || || || | ||| ||| | | | || |||| || | |||| |
+| || ||| | || || || | | | || |||\++++++++--++-+---+-++-++++---++++--++-+----+-+-+---+++--+---++-++-++-+-+++--/|| | | | || |||| || | |||| |
+| || ||| | || || || | | | || ||| |||||||| || \---+-++-++++---++++--++-+----/ | |/--+++--+---++-++-++-+-+++---++--+-+-+-++-++++--++\| |||| |
+| || ||| \--++--++--++-+-+-+---+/ ||| |||||\++--++-----+-++-++++---++++--++-+------+-++--+++--+---++-++-++-+-+++---++--+-+-+-++-++++--++++---++/| |
+| || ||| || || || | | | | ||| ||||| || || | || |||| |||| || | /---+-++--+++--+---++-++-++-+-+++---++-\| | | || |||| |||| || | |
+| || ||| |\--++--++-+-+-+---+--+++-+/||| || || | || |||| |||| || | | | || ||| | || || || | ||| || || | | || |||| |||| || | |
+| || ||| | || /++-+-+-+---+--+++-+-+++-++--++-----+-++-++++---++++\ || |/-+---+-++--+++--+---++-++-++-+-+++---++-++-+-+-++-++++--++++-\ || | |
+| || ||| | || ||| | | | | ||| |/+++-++--++-----+-++-++++---+++++-++-++-+---+-++--+++--+\ || || || | ||| || || | | || |||| ||||/+-++-+-+\
+| || ||| | || ||| | | | | ||| ||||| || || | || |v|| /-+++++-++-++-+---+-++--+++--++--++-++-++-+-+++---++-++-+-+-++-++++\ |||||| || | ||
+| || ||| | || ||| | | | | ||| ||||| || || | || |||| | ||||| || || | /+-++--+++--++--++-++-++-+-+++---++\|| | | || ||||| |||||| || | ||
+| || ||| | || ||| | | | | ||| ||||| || || /-+-++-++++-+-+++++-++-++-+--++-++--+++--++--++-++-++-+-+++---+++++-+-+-++-+++++\|||||| || | ||
+| || ||| | || ||| | | | | ||| ||||| || || | | || |||| | ||||| ||/++-+--++-++--+++--++--++-++-++-+-+++---+++++-+-+-++\|||||||||||| || | ||
+| || ||| | || ||| | | | | ||| ||||| || || | | || \+++-+-+++++-+++++-+--++-++--+++--++--++-++-++-+-+++---+++++-+-+-+++++++++++++++-/| | ||
+| \+-+++----+---++-+++-+-+-/ v ||| ||||| || || | | || ||| | |||\+-+++++-+--+/ || ||| || || || || | ||| ||||| | | ||||||||||||||| | | ||
+| | ||| |/--++-+++-+-+-----+--+++-+++++-++--++---+-+-++--+++-+-+++-+-+++++-+--+--++--+++--++-\|| || || | ||| ||||| | | ||||||||||||||| | | ||
+| | ||| || || ||| | | | ||| ||||| |\--++---+-+-++--+++-+-+++-+-+++++-+--+--++--+++--++-+++-++-++-+-+++---+++++-/ | ||||||||||||||| | | ||
+| | ||| || /++-+++-+-+-----+--+++-+++++-+-\ || | | || ||| | ||| | ||||| | | || ||| || ||| || || | ||| ||||| | ||||||||||||||| | | ||
+| | ||| || ||| ||| | | | ||| ||||| | | || | | || ||| | ||| | ||||| | | || ||| || ||| || || | ||| |\+++---+-+/||||||||||||| | | ||
+| | ||| || ||| ||| | | | ||| ||||| | | || | | || ||| | ||| | ||||| | | || ||| || ||| || || | ||| | ||| | | ||||||||||||| | | ||
+| | ||| || ||| ||| \-+-----+--+++-+++++-+-+-++---+-+-++--+++-+-+++-+-+++++-+--+--++--+/| || ||| || || | ||| | ||| | | ||||||||||||| | | ||
+| | ||| || ||| ||| | | ||| ||||| | | || | | \+--+++-+-+/| | ||||| | | || | | || ||| || || | ||| | ||| | | ||||||||||||| | | ||
+| | ||| \+-+++-+++---+-----+--+++-+++++-+-+-++---+-/ | ||| | | | | ||||| | | ||/-+-+--++-+++-++\|| | ||| | ||| | | ||||||||||||| | | ||
+| | ||| | ||| ||| | | ||| ||||| | | |\---+----+--+++-+-+-+-+-+++++-+--+--+++-+-+--++-+++-+++++-+-/|| | ||| | | ||||||||\++++--+-/ ||
+| | ||| | ||| ||| | | ||| ||||| | | | | | ||| | | | | ||||| | | ||| | |/-++-+++-+++++-+--++---+-+++--\| | |||||||| |||| | ||
+| \-+++-----+-+++-+++---+-----+--+++-+++++-+-+-+----+----+--+++-+-+-+-+-+++++-+--+--+++-+-++-++-+++-++++/ |/-++---+-+++--++-+-++++++++-++++--+---++\
+| ^|| | |||/+++---+-----+--+++-+++++-+-+-+----+----+--+++-+-+-+-+-+++++-+-\| ||| | || || ||| |||| || || | ||| || | |||||||| |||| | |||
+| ||| | ||||||| | | ||| ||||| | | | | | ||| | | | | ||\++-+-++--+++-+-++-++-+++-++++--++-++---+-+++--++-+-/||||||| |||| | |||
+| ||| | ||||||| | | ||\-+++++-+-+-+----+----+--+++-+-+-+-+-++-++-+-++--+++-+-++-++-+++-++++--++-+/ | ||| || | ||||||| |||| | |||
+| ||\-----+-+++++++---+-----+--/| ||||| | | | | | ||| | | | | ||/++-+-++--+++-+-++-++\||| |||| || | | ||| || | ||||||| |||| | |||
+| || | ||||||| \-----+---+--+++++-+-+-+----+----+--+++-+-+-+-+-+++++-+-++--/|| | || |||||| |||| || | | ||| || | ||||||| |||| | |||
+| || | ||||||\---------+---+--+++++-+-+-+----+----+--+++-+-+-+-+-+++++-+-++---++-/ || |||||| |||| || | | ||| || | ||||||| |||| | |||
+| || | |\++++----------+---+--+++++-/ | | | | |\+-+-+-+-+-/|||| | || || || |||||| |||| || | | ||| || | ||||||| |||| v |||
+| || | | |||| | | ||\++---+-+----+----+--+-+-+-+-+-+--++++-+-++---++---++-++++++-++++--++-/ | ||| || | ||||||| |||| | |||
+| || | | |||| | | || || | | | | | \-+-+-+-+--++++-+-++---++---++-++++++-++++--++------+-++/ || | ||||||| |||| | |||
+| || | | |||| \---+--++-++---+-+----+----+--+---+-+-+-+--++++-+-++---++---++-++++++-++++--++------+-++---++-+--++++++/ |||| | |||
+| || | \-++++--------------+--++-++---/ | | | | | | | | |||| | || |\---++-++++++-++/| || | || || | |||||| |||| | |||
+| || | |||| | || || | | | | | | | | |||| | || |/---++-++++++-++-+--++----\ | || || | |||||| |||| | |||
+| || | |||| | || || /-+----+----+--+---+-+-+-+--++++-+-++---++---++-++++++-++-+--++----+-+-++--\|| | |||||| |||| | |||
+| || | |||| | || \+---+-+----+----+--+---+-+-+-+--++++-+-++---++---++-++++++-++-+--++----+-+-++--+++-+--+/|||| |||| | |||
+| || | |||\--------------+--++--+---+-+----+----+--+---+-+-+-+--++++-+-++---++---++-++++++-++-+--++----+-+-++--+++-/ | |||| |||| | |||
+| || | ||| /-----------+--++--+---+-+----+----+--+---+-+-+-+--++++-+-++--\|| || |||||| || | || | | || ||| | |||| |||| | |||
+| || | ||| | | \+--+---+-+----+----+--+---+-+-+-+--++++-+-++--+++---++-++++++-++-+--/| | | || ||| | |||| |||| | |||
+| |\------+---+++---+-----------+---+--+---+-+----+----/ | | | | | |||| | || ||| || |||||| || | | | | || ||| | |||| |||| | |||
+| | | ||| | | | | | | | \---+-+-+-+--++++-+-++--+++---++-++++++-++-/ | | | || ||| | |||| |||| | |||
+| | | ||| | | | |/--+-+----+-----------+-+-+-+--++++-+-++--+++---++-++++++-++-----+----+-+-++--+++-\ | |||| |||| | |||
+| | | ||\---+-----------+---+--++--+-+----+-----------+-+-+-/ |||| | || ||| || |||||| || | | | || ||| | | |||| |||| | |||
+| | | || | /--+---+--++\ | | | | \-+----++++-+-++--+++---++-++++++-++-----+----+-/ || ||| | | |||| |||| | |||
+| | | || | | | | ||| | | | | | |||| | || ||| || |||||| || | | || ||| | | |||| |||| | |||
+| | | || | | | | ||| | | | | | |||| | || ||| |\-++++++-++-----+----+---++--+/| | | |||| ||\+--+---+/|
+| | | || \--------+--+---+--+++-+-+----+-----------+---+----++++-+-++--/|| | \+++++-++-----+----+---++--+-+-+--+-++++--+/ | | | |
+| | | || | | | \++-+-+----+-----------+---+----++++-+-++---++---+---+++++-++-----+----+---++--+-+-+--+-/||| | | | | |
+| | /-+---++--------\ | | | || | | | | | ||\+-+-++---++---+---+++++-+/ | | || | | | | ||| | | | | |
+| | | | || | | | | || | | | \---+----++-+-+-++---++---+---+++++-+------+----+->-++--+-+-+--+--+/| | | | | |
+| | | | || | | | | || | | | | || \-+-++---++---+---+++++-+------+----+---++--+-+-+--+--+-+--+--/ | | |
+| | | | \+--------+----+--/ | \+-+-+----+---------------+----++---+-++---++---+---+++++-+------+----+---++--+-+-/ | | | | | | |
+\----+-----+-+----+--------+----+------+----+-+-+----+---------------+----++---+-++---++---+---++++/ | | | || | | | | | | | | |
+ | | | | | | | | | | | /-------+----++---+-++---++---+---++++--+---\ | | || | | | | | | | | |
+ | | | | | | \----+-+-+----+-------+-------+----++---+-++---++---+---/||| | | | | || | | | | | | | | |
+ | | | | | | | | | | | | || | || || | ||| | | \----+---++--+-+----+--+-+--+-----+---+-/
+ | | | | | | | | | | | | || | |\---++---+----+++--+---+-------+---/| | \----+--+-+--+-----+---/
+ | | | | | | | | | | | \----++---+-+----++---+----+++--+---+-------+----+--+------+--+-+--+-----/
+ | | | | | | | | | | | \+---+-+----++---+----+++--+---+-------+----+--+------+--/ | |
+ | | | | | | | | \----+-------+-------------+---+-+----++---/ ||| | | | | | | | |
+ | \-+----+--<-----/ | | | | | | | | \+--------+++--+---+-------+----+--+------+----+--/
+ | | \-------------+-----------+-+------+-------+-------------+---+-/ \--------+++--+---+-------/ | | | |
+ | | \-----------/ | | | | \----------------+++--+---+------------/ | | |
+ | | | \-------+-------------+--------------------+++--+---+---------------+------+----/
+ | | | | \--------------------/|\--+---+---------------+------/
+ | v \--------------+-----------------------------------+---+---+---------------/
+ \-------+-----------------------------------------------+-----------------------------------+---/ |
+ | \-----------------------------------+-------/
+ \--------------------------------------------------------------------------------<--/
diff --git a/day13.rb b/day13.rb
new file mode 100644
index 0000000..9b2003c
--- /dev/null
+++ b/day13.rb
@@ -0,0 +1,137 @@
+maze = File.readlines("day13")
+
+xmaze = <<'EOF'.lines.to_a
+/->-\
+| | /----\
+| /-+--+-\ |
+| | | | v |
+\-+-/ \-+--/
+ \------/
+EOF
+
+cars = []
+
+maze.each_with_index { |row, i|
+ row.chars.each_with_index { |col, j|
+ case col
+ when "^"; cars << [i,j,:n,:l]; row[j] = "|"
+ when ">"; cars << [i,j,:e,:l]; row[j] = "-"
+ when "v"; cars << [i,j,:s,:l]; row[j] = "|"
+ when "<"; cars << [i,j,:w,:l]; row[j] = "-"
+ end
+ }
+}
+
+
+cars = [
+ [65, 26, :s, :r],
+ [105, 39, :n, :l],
+ [140, 85, :e, :r]
+]
+
+puts maze
+
+crashed = []
+
+loop {
+ cars.sort! #_by! { |(i,j,d,s)| [j,i] }
+
+ p cars.size
+ p cars
+
+ m = maze.map {|l|l.dup}
+ cars.each { |(i,j,d,s)|
+ m[i][j] = case d
+ when :e; ">"
+ when :n; "^"
+ when :s; "v"
+ when :w; "<"
+ end
+ }
+# puts m
+
+ if cars.size == 1
+ p cars
+ break
+ end
+
+ cars.each_with_index { |(i,j,d,s),n|
+ p [maze[i][j],d]
+ case [maze[i][j],d]
+ when ["-", :e]
+ cars[n][1] += 1
+ when ["-", :w]
+ cars[n][1] -= 1
+ when ["|", :s]
+ cars[n][0] += 1
+ when ["|", :n]
+ cars[n][0] -= 1
+ when ["+", :s]
+ case s
+ when :l; cars[n][1] +=1; cars[n][2] = :e; cars[n][3] = :s
+ when :s; cars[n][0] +=1; cars[n][3] = :r
+ when :r; cars[n][1] -=1; cars[n][2] = :w; cars[n][3] = :l
+ end
+ when ["+", :n]
+ case s
+ when :l; cars[n][1] -=1; cars[n][2] = :w; cars[n][3] = :s
+ when :s; cars[n][0] -=1; cars[n][3] = :r
+ when :r; cars[n][1] +=1; cars[n][2] = :e; cars[n][3] = :l
+ end
+ when ["+", :e]
+ case s
+ when :l; cars[n][0] -=1; cars[n][2] = :n; cars[n][3] = :s
+ when :s; cars[n][1] +=1; cars[n][3] = :r
+ when :r; cars[n][0] +=1; cars[n][2] = :s; cars[n][3] = :l
+ end
+ when ["+", :w]
+ case s
+ when :l; cars[n][0] +=1; cars[n][2] = :s; cars[n][3] = :s
+ when :s; cars[n][1] -=1; cars[n][3] = :r
+ when :r; cars[n][0] -=1; cars[n][2] = :n; cars[n][3] = :l
+ end
+ when ["\\", :e]
+ cars[n][2] = :s
+ cars[n][0] += 1
+ when ["/", :e]
+ cars[n][2] = :n
+ cars[n][0] -= 1
+ when ["\\", :n]
+ cars[n][2] = :w
+ cars[n][1] -= 1
+ when ["/", :n]
+ cars[n][2] = :e
+ cars[n][1] += 1
+ when ["\\", :s]
+ cars[n][2] = :e
+ cars[n][1] += 1
+ when ["/", :s]
+ cars[n][2] = :w
+ cars[n][1] -= 1
+ when ["/", :w]
+ cars[n][2] = :s
+ cars[n][0] += 1
+ when ["\\", :w]
+ cars[n][2] = :n
+ cars[n][0] -= 1
+ else
+ p [:miss, maze[i][j], d]
+ end
+
+ if cars.each.with_index.any? { |(i2,j2,_,_,m)| i == i2 && j == j2 && n != m }
+ if crashed.empty?
+ p [:crash, j, i]
+ end
+ crashed << true
+ cars.delete_at n
+ cars.delete_if { |(i2,j2,_,_,m)| i == i2 && j == j2 }
+ end
+
+ }
+}
+
+p cars
+
+# 32,8 ok
+# 38,38
+
diff --git a/day14 b/day14
new file mode 100644
index 0000000..bb84d0a
--- /dev/null
+++ b/day14
@@ -0,0 +1 @@
+360781
diff --git a/day14.rb b/day14.rb
new file mode 100644
index 0000000..c290b18
--- /dev/null
+++ b/day14.rb
@@ -0,0 +1,25 @@
+d = 360781
+
+s = [3,7]
+e1 = 0
+e2 = 1
+
+30_000_000.times {
+# p [:X, e1, e2, s[e1], s[e2]]
+ c = (s[e1] + s[e2]).to_s.split('').map(&:to_i)
+ s.concat c
+ e1 = (e1 + 1 + s[e1]) % s.size
+ e2 = (e2 + 1 + s[e2]) % s.size
+
+# p s
+
+# p s.size-6 if s[-7]==3&&s[-6]==6&&s[-5]==0&&s[-4]==7&&s[-3]==9&&s[-2]==1
+# p s.size-6 if s[-6]==3&&s[-5]==6&&s[-4]==0&&s[-3]==7&&s[-2]==9&&s[-1]==1
+}
+
+p s.size
+p s[d,10].join('')
+# 6521571010
+
+p s.join('').index d.to_s
+# 20262967
diff --git a/day15.rb b/day15.rb
new file mode 100644
index 0000000..4df8590
--- /dev/null
+++ b/day15.rb
@@ -0,0 +1,32 @@
+################################
+#####################....#######
+#####################....#######
+####################.....#######
+#########...G#######......######
+#########....#....#.........#..#
+######.#...G####.G......#..E...#
+######.##..##.#.......###....###
+####............#.##..###.....##
+####.G.##....G....###.####...###
+####.GGG##........###.#####..###
+#####...##...G.................#
+######.###..G.#####.........####
+######..##...#######........####
+######...GG.#########....E...###
+######.....G#########.E.E......#
+######......#########..........#
+#########.#.#########....#....##
+#########G#.#########.....######
+###.#####G...#######......######
+#..G..##...E..#####........#####
+#..##.##.................E.#####
+#..G.......................#####
+###..G......G..E............####
+###...##.G......#...##......####
+########..E....##.#######..#####
+#######........#################
+#######........#################
+########.##......###############
+######...##..E.E.###############
+######.....##.#.################
+################################
diff --git a/day16 b/day16
new file mode 100644
index 0000000..a768055
--- /dev/null
+++ b/day16
@@ -0,0 +1,4014 @@
+Before: [0, 2, 2, 2]
+4 2 3 2
+After: [0, 2, 5, 2]
+
+Before: [2, 2, 1, 3]
+3 1 0 2
+After: [2, 2, 1, 3]
+
+Before: [0, 2, 0, 0]
+8 1 2 0
+After: [4, 2, 0, 0]
+
+Before: [2, 2, 2, 0]
+2 1 2 2
+After: [2, 2, 1, 0]
+
+Before: [3, 1, 2, 2]
+11 1 0 3
+After: [3, 1, 2, 3]
+
+Before: [1, 1, 2, 3]
+12 0 3 0
+After: [0, 1, 2, 3]
+
+Before: [3, 1, 2, 2]
+15 0 3 3
+After: [3, 1, 2, 6]
+
+Before: [1, 2, 2, 2]
+6 1 0 1
+After: [1, 1, 2, 2]
+
+Before: [0, 1, 3, 1]
+5 1 0 2
+After: [0, 1, 1, 1]
+
+Before: [2, 2, 1, 0]
+3 1 0 1
+After: [2, 1, 1, 0]
+
+Before: [3, 3, 1, 2]
+6 3 3 1
+After: [3, 0, 1, 2]
+
+Before: [2, 2, 3, 0]
+3 1 1 0
+After: [1, 2, 3, 0]
+
+Before: [0, 2, 2, 1]
+15 3 1 0
+After: [2, 2, 2, 1]
+
+Before: [0, 1, 3, 1]
+5 1 0 0
+After: [1, 1, 3, 1]
+
+Before: [0, 1, 0, 3]
+5 1 0 0
+After: [1, 1, 0, 3]
+
+Before: [3, 2, 2, 3]
+7 1 0 3
+After: [3, 2, 2, 1]
+
+Before: [0, 2, 3, 0]
+10 0 0 1
+After: [0, 0, 3, 0]
+
+Before: [0, 1, 1, 0]
+4 2 3 0
+After: [4, 1, 1, 0]
+
+Before: [2, 1, 2, 3]
+14 0 2 1
+After: [2, 4, 2, 3]
+
+Before: [2, 1, 3, 2]
+1 3 1 2
+After: [2, 1, 3, 2]
+
+Before: [2, 2, 2, 1]
+1 3 2 0
+After: [3, 2, 2, 1]
+
+Before: [0, 0, 3, 1]
+10 0 0 0
+After: [0, 0, 3, 1]
+
+Before: [0, 2, 2, 3]
+2 1 2 3
+After: [0, 2, 2, 1]
+
+Before: [2, 1, 0, 3]
+12 0 3 2
+After: [2, 1, 0, 3]
+
+Before: [3, 0, 3, 3]
+4 2 2 1
+After: [3, 5, 3, 3]
+
+Before: [0, 3, 3, 1]
+3 1 2 0
+After: [1, 3, 3, 1]
+
+Before: [2, 0, 0, 3]
+12 0 3 1
+After: [2, 0, 0, 3]
+
+Before: [2, 0, 3, 2]
+4 2 2 2
+After: [2, 0, 5, 2]
+
+Before: [1, 3, 3, 0]
+3 1 2 1
+After: [1, 1, 3, 0]
+
+Before: [1, 1, 2, 2]
+4 0 3 0
+After: [4, 1, 2, 2]
+
+Before: [1, 2, 2, 3]
+15 0 1 3
+After: [1, 2, 2, 2]
+
+Before: [3, 2, 3, 0]
+7 1 0 3
+After: [3, 2, 3, 1]
+
+Before: [0, 1, 2, 0]
+10 0 0 2
+After: [0, 1, 0, 0]
+
+Before: [0, 3, 2, 1]
+10 0 0 0
+After: [0, 3, 2, 1]
+
+Before: [2, 1, 3, 2]
+9 1 3 0
+After: [3, 1, 3, 2]
+
+Before: [1, 1, 3, 0]
+13 1 0 2
+After: [1, 1, 1, 0]
+
+Before: [3, 1, 2, 2]
+6 3 3 2
+After: [3, 1, 0, 2]
+
+Before: [3, 1, 3, 2]
+15 2 3 2
+After: [3, 1, 6, 2]
+
+Before: [3, 2, 2, 2]
+7 1 0 1
+After: [3, 1, 2, 2]
+
+Before: [1, 1, 0, 2]
+13 1 0 2
+After: [1, 1, 1, 2]
+
+Before: [1, 1, 2, 3]
+13 1 0 0
+After: [1, 1, 2, 3]
+
+Before: [1, 1, 2, 1]
+9 2 1 2
+After: [1, 1, 3, 1]
+
+Before: [1, 2, 2, 2]
+2 1 2 1
+After: [1, 1, 2, 2]
+
+Before: [1, 0, 1, 2]
+0 1 0 3
+After: [1, 0, 1, 1]
+
+Before: [1, 2, 2, 2]
+6 3 3 0
+After: [0, 2, 2, 2]
+
+Before: [2, 2, 2, 2]
+3 1 1 1
+After: [2, 1, 2, 2]
+
+Before: [1, 3, 0, 3]
+9 0 3 0
+After: [3, 3, 0, 3]
+
+Before: [0, 2, 2, 1]
+2 1 2 1
+After: [0, 1, 2, 1]
+
+Before: [3, 2, 1, 0]
+7 1 0 0
+After: [1, 2, 1, 0]
+
+Before: [2, 0, 3, 1]
+6 3 3 0
+After: [0, 0, 3, 1]
+
+Before: [2, 2, 2, 2]
+6 3 3 1
+After: [2, 0, 2, 2]
+
+Before: [1, 1, 2, 0]
+13 1 0 1
+After: [1, 1, 2, 0]
+
+Before: [3, 3, 1, 3]
+11 2 0 2
+After: [3, 3, 3, 3]
+
+Before: [2, 2, 3, 0]
+3 1 0 2
+After: [2, 2, 1, 0]
+
+Before: [1, 2, 0, 3]
+12 0 3 2
+After: [1, 2, 0, 3]
+
+Before: [0, 2, 3, 1]
+10 0 0 0
+After: [0, 2, 3, 1]
+
+Before: [1, 0, 2, 2]
+0 1 0 3
+After: [1, 0, 2, 1]
+
+Before: [1, 0, 1, 0]
+0 1 0 3
+After: [1, 0, 1, 1]
+
+Before: [0, 1, 1, 2]
+5 1 0 3
+After: [0, 1, 1, 1]
+
+Before: [0, 3, 0, 2]
+11 0 3 2
+After: [0, 3, 2, 2]
+
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+4 0 1 0
+8 0 3 0
+14 0 2 2
+5 2 0 0
+1 0 1 2
+8 0 0 3
+4 3 1 3
+8 3 2 1
+8 1 1 1
+14 1 0 0
+1 0 0 1
+1 2 0 3
+1 2 0 2
+9 2 3 2
+8 2 3 2
+14 2 0 0
+5 0 0 1
+1 3 0 0
+1 3 0 2
+1 0 3 3
+0 3 2 0
+8 0 2 0
+8 0 2 0
+14 0 1 1
+5 1 3 2
+1 1 0 0
+8 1 0 1
+4 1 1 1
+1 3 3 3
+14 1 0 0
+8 0 3 0
+14 2 0 2
+5 2 0 1
+1 2 1 2
+1 3 0 0
+1 2 1 3
+7 2 0 0
+8 0 2 0
+14 0 1 1
+5 1 0 2
+1 1 0 3
+1 3 3 1
+1 2 1 0
+15 3 0 0
+8 0 3 0
+8 0 3 0
+14 0 2 2
+5 2 1 3
+1 3 2 2
+1 1 3 1
+1 0 0 0
+8 1 2 1
+8 1 2 1
+14 1 3 3
+8 3 0 0
+4 0 2 0
+1 2 1 2
+8 3 0 1
+4 1 3 1
+7 0 1 2
+8 2 3 2
+14 3 2 3
+5 3 2 0
+8 0 0 3
+4 3 0 3
+1 2 0 2
+8 3 0 1
+4 1 1 1
+12 3 2 2
+8 2 2 2
+14 2 0 0
+1 0 1 1
+1 1 0 3
+1 2 0 2
+4 3 1 2
+8 2 1 2
+8 2 2 2
+14 2 0 0
+5 0 0 3
+8 3 0 2
+4 2 3 2
+1 2 1 0
+2 0 2 0
+8 0 3 0
+14 0 3 3
+1 2 2 0
+2 0 2 2
+8 2 2 2
+8 2 1 2
+14 3 2 3
+5 3 0 1
+1 2 0 3
+1 2 2 2
+9 0 3 3
+8 3 1 3
+14 3 1 1
+5 1 3 3
+1 3 3 1
+1 1 3 2
+10 1 2 2
+8 2 2 2
+8 2 1 2
+14 3 2 3
+5 3 0 0
diff --git a/day16.rb b/day16.rb
new file mode 100644
index 0000000..782e9bd
--- /dev/null
+++ b/day16.rb
@@ -0,0 +1,92 @@
+def op(cmd, regs)
+ regs2 = regs.dup
+
+ case cmd[0]
+ when :addr; regs2[cmd[3]] = regs[cmd[1]] + regs[cmd[2]]
+ when :addi; regs2[cmd[3]] = regs[cmd[1]] + cmd[2]
+ when :mulr; regs2[cmd[3]] = regs[cmd[1]] * regs[cmd[2]]
+ when :muli; regs2[cmd[3]] = regs[cmd[1]] * cmd[2]
+ when :banr; regs2[cmd[3]] = regs[cmd[1]] & regs[cmd[2]]
+ when :bani; regs2[cmd[3]] = regs[cmd[1]] & cmd[2]
+ when :borr; regs2[cmd[3]] = regs[cmd[1]] | regs[cmd[2]]
+ when :bori; regs2[cmd[3]] = regs[cmd[1]] | cmd[2]
+ when :setr; regs2[cmd[3]] = regs[cmd[1]]
+ when :seti; regs2[cmd[3]] = cmd[1]
+ when :gtir; regs2[cmd[3]] = cmd[1] > regs[cmd[2]] ? 1 : 0
+ when :gtri; regs2[cmd[3]] = regs[cmd[1]] > cmd[2] ? 1 : 0
+ when :gtrr; regs2[cmd[3]] = regs[cmd[1]] > regs[cmd[2]] ? 1 : 0
+ when :eqri; regs2[cmd[3]] = regs[cmd[1]] == cmd[2] ? 1 : 0
+ when :eqir; regs2[cmd[3]] = cmd[1] == regs[cmd[2]] ? 1 : 0
+ when :eqrr; regs2[cmd[3]] = regs[cmd[1]] == regs[cmd[2]] ? 1 : 0
+ end
+
+ regs2
+end
+
+OPS = [:addr, :addi, :mulr, :muli, :banr, :bani, :borr, :bori, :setr, :seti,
+ :gtri, :gtir, :gtrr, :eqri, :eqir, :eqrr]
+
+OPS.each { |o|
+
+ if op([o, 2, 1, 2], [3, 2, 1, 1]) == [3, 2, 2, 1]
+ p o
+ end
+}
+
+p1 = 0
+
+poss = Array.new(16) { OPS }
+
+code = nil
+
+File.read("day16").split("\n\n").each { |samp|
+ if samp =~ /^Before:/
+ x = samp.lines.map { |l| l.scan(/\[.*?\]/) }
+ before = eval(x[0].first)
+ unop, *args = samp.lines[1].split(' ').map(&:to_i)
+ after = eval(x[2].first)
+
+ n = OPS.find_all { |o|
+ op([o, *args], before) == after
+ }
+
+ poss[unop] &= n
+
+ if n.size >= 3
+ p1 += 1
+ end
+ else
+ code = samp
+ end
+}
+
+p p1
+
+require 'pp'
+
+pp poss
+
+loop {
+ det = poss.find_all { |p| p.size == 1 }.flatten
+ break if det.size == 16
+ poss.each_index { |i|
+ poss[i] -= det unless poss[i].size == 1
+ }
+}
+
+poss.map!(&:first)
+
+p poss
+
+regs = [0,0,0,0]
+code.each_line { |l|
+ numop, *args = l.split(' ').map(&:to_i)
+ regs = op([poss[numop], *args], regs)
+}
+p regs[0]
+
+__END__
+
+Before: [3, 2, 1, 1]
+9 2 1 2
+After: [3, 2, 2, 1]
diff --git a/day18 b/day18
new file mode 100644
index 0000000..3fc46f8
--- /dev/null
+++ b/day18
@@ -0,0 +1,50 @@
+....||.#|..|...|.#..#...|.|.....|.....##|.....||..
+....#.|..|.....#|....|#|##|...#........|...#.#|.#.
+.#||....|...#####..|.|.#..|..|.|..#.|#....#..||#..
+.....|....|..|....#....#..#...||....|.....#.|#..|#
+.|.#||##.|..#....|#.|..|||#..##.|.#.|..##..|...|.|
+.|.|...|...|#.|.....#...#|.#.....#..|#........###.
+......|#|..#....|.#.#|....||#|.|#.....#|..#.#||...
+.|.......##|..|..#|....|.|.|....#..|#|#.#...#.||##
+##|..#.#..#||.###.|......|#.|....#...#.|...#....#|
+..|###|#....#.|.#|#|.....|..|.||#|.|#.||...|##...#
+...#....|.||||.|.|.##...#..|.||.|....#|#|#.|..|||.
+|#....#...##..#||..|..#|.......|#|....|.|.|..|##..
+|#....|.|..|..|..#.#......|..|.|..|||.#||...#.#.||
+...|.|.....#.##|....|..#.|.....||..##..#..|||.....
+.###.#.|.|||#.#.|.|.|...#..###..#|.........|.....#
+|..#..|#..#........#.#.###.#...|.|.....|.||.|.|.||
+|##.|..#..#...#|.........#|...#||.|..#|#.|.|..||..
+....||.|....#.....|......#.|.|#.#.......|.|...#...
+|.#.#|..#|#..#.#......#||.#..|||.#.#..#.||.####.#.
+|.||.|.|.|#|.#.#|.#.|||..|........|..#..|.......|.
+##..|.#..||............|||..#....|.....###|#...|#.
+#|.|..#.|.|......|#|#.||.|....#...#....|...|...|..
+#.#.#...##...#....|#|#||.#|#...|#||#|....|..|...||
+.|.#.|.|...###.|..##..||#..|.....||.|.|....##..#|#
+..#|#|..##...##|..|||||.|....|.#..|...|...#.#|||..
+..|.|....#.##.##|..|#..|...||...|..||##..##...#.##
+..#|###..##....##|.||.|.|.||#...|.#.#|#.##||.|..|.
+...|#...|#..#.....#|.....##..##.......#...##.|...#
+.|..#.##|....#.#.#...|...##........|##|..#.|...|..
+......|#....#.........#.|.....||...#|.|...#.|#....
+..|.#..###||...#|###...|.|...|.|....#...#..|.|.#.|
+.#|....||#.#|..#.#|..##.........|#.|.....#....|||.
+....#.#....#|.|#.#.#.|#............|.#.#....|#...|
+..|#....#|...#.#..#.#.#||..#.#..|......##.#.||....
+..|#....|#..|.#..#....#.|#.||.....#..#.#|.#...|..#
+.#........|||.......|....|||.#|#..#.#|#........||.
+#..|.....#...#..#.|#....##...##.##...#||.........|
+..|.##.|..|...|..#|#.|.........||...##......###.|.
+.|..|...#....||..#....#||#...#.#......##......#|.#
+.|..#......#.|.#.##.|..|...#.|##..|||...|.......#.
+...#..#..|#.|.....#||.|....#...|##|##.....|.#..|..
+#.....#...#...##.|....|......##...|...#.#.#.|.....
+....#..|.|.|###|.##.|.#|.|.||.|#..|#..#...|.##.#..
+..|.|.#.|#.#...##.#||#...#..||.#.|#..|###....|#...
+|.|..........|.#......#..#|.#...#.....#.#.#|.###.|
+#..#|||....#..|....##|...|.#.|##||.|..|.#|.|...|#|
+.|###..#.....|.#.||.#..|#...#.#|.#|.|.##|....#|#..
+.|...#...##......|..#.|#|.#.##......#.|......|...|
+#.#..|#.#...#.|#|....#|##..#....##|..#.|..|#...|..
+.#.#..|.#..#........##.|#..|##||......|..#...#....
diff --git a/day18.rb b/day18.rb
new file mode 100644
index 0000000..a9f0967
--- /dev/null
+++ b/day18.rb
@@ -0,0 +1,95 @@
+d = ["\n", *File.readlines("day18").map { |x| " " + x }, "\n"]
+
+
+=begin
+ An open acre will become filled with trees if three or more adjacent acres contained trees. Otherwise, nothing happens.
+ An acre filled with trees will become a lumberyard if three or more adjacent acres were lumberyards. Otherwise, nothing happens.
+ An acre containing a lumberyard will remain a lumberyard if it was adjacent to at least one other lumberyard and at least one acre containing trees. Otherwise, it becomes open.
+=end
+
+
+xd = <<EOF.lines.to_a
+
+ .#.#...|#.
+ .....#|##|
+ .|..|...#.
+ ..|#.....#
+ #.#|||#|#|
+ ...#.||...
+ .|....|...
+ ||...#|.#|
+ |.||||..|.
+ ...#.|..|.
+
+EOF
+
+require 'pp'
+
+seen = []
+
+p1 = 0
+
+i = 0
+d2 = nil
+1000.times { |i|
+pp d
+
+d2 = d.map(&:clone)
+
+d.each_index { |i|
+ d[i].chars.each_index { |j|
+ case d[i][j]
+ when '.'
+ if [d[i-1][j-1], d[i-1][j], d[i-1][j+1],
+ d[i ][j-1], d[i ][j+1],
+ d[i+1][j-1], d[i+1][j], d[i+1][j+1]].count('|') >= 3
+ d2[i][j] = '|'
+ end
+ when '|'
+ if [d[i-1][j-1], d[i-1][j], d[i-1][j+1],
+ d[i ][j-1], d[i ][j+1],
+ d[i+1][j-1], d[i+1][j], d[i+1][j+1]].count('#') >= 3
+ d2[i][j] = '#'
+ end
+ when '#'
+ s = [d[i-1][j-1], d[i-1][j], d[i-1][j+1], :X,
+ d[i ][j-1], d[i ][j+1], :Y,
+ d[i+1][j-1], d[i+1][j], d[i+1][j+1]]
+ if s.include?('#') && s.include?('|')
+ # keep
+ else
+ d2[i][j] = '.'
+ end
+ end
+ }
+}
+
+if seen.include? d2
+ p [:cycle, i, seen.size - seen.index(d2)]
+ break
+else
+ seen << d2
+end
+
+if i == 10
+ r = d.join
+ p1 = r.count('#') * r.count('|') # 535522
+end
+
+d = d2
+r = d.join
+}
+
+
+p p1
+
+n = (1000000000-i)%(seen.size - seen.index(d2))
+
+p seen.map { |s|
+r = s.join
+p2 = r.count('#') * r.count('|')
+}.index(210160)
+
+#p p2
+
+# 210160
diff --git a/day19 b/day19
new file mode 100644
index 0000000..3a7db07
--- /dev/null
+++ b/day19
@@ -0,0 +1,37 @@
+#ip 4
+addi 4 16 4
+seti 1 9 5
+seti 1 5 2
+mulr 5 2 1
+eqrr 1 3 1
+addr 1 4 4
+addi 4 1 4
+addr 5 0 0
+addi 2 1 2
+gtrr 2 3 1
+addr 4 1 4
+seti 2 6 4
+addi 5 1 5
+gtrr 5 3 1
+addr 1 4 4
+seti 1 2 4
+mulr 4 4 4
+addi 3 2 3
+mulr 3 3 3
+mulr 4 3 3
+muli 3 11 3
+addi 1 5 1
+mulr 1 4 1
+addi 1 2 1
+addr 3 1 3
+addr 4 0 4
+seti 0 2 4
+setr 4 8 1
+mulr 1 4 1
+addr 4 1 1
+mulr 4 1 1
+muli 1 14 1
+mulr 1 4 1
+addr 3 1 3
+seti 0 0 0
+seti 0 2 4
diff --git a/day19.rb b/day19.rb
new file mode 100644
index 0000000..ec3e2ff
--- /dev/null
+++ b/day19.rb
@@ -0,0 +1,86 @@
+insn = [:eqri, :seti, :eqir, :eqrr, :addi, :setr, :gtrr, :gtir, :muli, :bori, :bani, :borr, :gtri, :banr, :addr, :mulr]
+
+def op(cmd, regs)
+ regs2 = regs.dup
+
+ case cmd[0]
+ when :addr; regs2[cmd[3]] = regs[cmd[1]] + regs[cmd[2]]
+ when :addi; regs2[cmd[3]] = regs[cmd[1]] + cmd[2]
+ when :mulr; regs2[cmd[3]] = regs[cmd[1]] * regs[cmd[2]]
+ when :muli; regs2[cmd[3]] = regs[cmd[1]] * cmd[2]
+ when :banr; regs2[cmd[3]] = regs[cmd[1]] & regs[cmd[2]]
+ when :bani; regs2[cmd[3]] = regs[cmd[1]] & cmd[2]
+ when :borr; regs2[cmd[3]] = regs[cmd[1]] | regs[cmd[2]]
+ when :bori; regs2[cmd[3]] = regs[cmd[1]] | cmd[2]
+ when :setr; regs2[cmd[3]] = regs[cmd[1]]
+ when :seti; regs2[cmd[3]] = cmd[1]
+ when :gtir; regs2[cmd[3]] = cmd[1] > regs[cmd[2]] ? 1 : 0
+ when :gtri; regs2[cmd[3]] = regs[cmd[1]] > cmd[2] ? 1 : 0
+ when :gtrr; regs2[cmd[3]] = regs[cmd[1]] > regs[cmd[2]] ? 1 : 0
+ when :eqri; regs2[cmd[3]] = regs[cmd[1]] == cmd[2] ? 1 : 0
+ when :eqir; regs2[cmd[3]] = cmd[1] == regs[cmd[2]] ? 1 : 0
+ when :eqrr; regs2[cmd[3]] = regs[cmd[1]] == regs[cmd[2]] ? 1 : 0
+ end
+
+ regs2
+end
+
+
+r0 = 0
+r3=10551348
+
+f = [1,
+ 2,
+ 3,
+ 4,
+ 6,
+ 9,
+ 12,
+ 18,
+ 36,
+ 293093,
+ 586186,
+ 879279,
+ 1172372,
+ 1758558,
+ 2637837,
+ 3517116,
+ 5275674,
+ 10551348]
+
+f.each { |r1|
+ f.each { |r5|
+ if r1*r5 == r3
+ r0 += r1
+ end
+ }
+}
+
+p r0
+
+
+rip, *program = File.readlines("day19")
+
+rip = rip.scan(/\d/)[0].to_i
+
+program.map! { |line|
+ o,a,b,c = line.split
+ [o.to_sym, a.to_i, b.to_i, c.to_i]
+}
+
+regs = [0]*6
+regs[0] = 1
+ip = 0
+
+loop {
+ break if ip < 0 || ip > program.size
+
+ regs[rip] = ip
+ p regs
+ regs = op(program[ip], regs)
+ ip = regs[rip] + 1
+}
+
+p regs.first # 2240
+
+# 10844452 too low
diff --git a/day20 b/day20
new file mode 100644
index 0000000..10e6b40
--- /dev/null
+++ b/day20
@@ -0,0 +1 @@
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(EEESESEEEEESWWSWSWNWN(EE|WWSESESWWWWSESESEENN(W(S|W)|EESEESESEEESWSEESEEEEEEE(SWSESWWNNWSSSWWWNNEN(ESSWENNW|)WWSSW(WNENWN(E|W(S|WWNN(ESENSWNW|)W(S|WNW(N(EESEWNWW|)N|WS(WNWSWNNWWWWWSWS(WWWNENWWSWNWNENNNENWWN(EN(ESESENE(NWWEES|)SEEESSSS(EE(E|NWNNE(ENN(E(SSEWNN|)NN(WS|ESE)|WSWNWWW(EEESENSWNWWW|))|S))|WWW(WWNN(WSSNNE|)EN(EESWS(EENNSSWW|)W|W)|S(S|E)))|W)|WWSESWSSSWNNNWW(WW|NEENNWSWN(SENESSNNWSWN|)|SESSSEESE(NNNEN(N|W)|ESWSS(WNNW(SSWWWW|N)|ES(SEESENE(S|NNWSWWNEN(NWSWENES|)EE)|W)))))|EESENN(EE|W))|E|S)))))|SSSSEEENEN(WWW(SEWN|)N|EESESWW(WSEESWWSSSSSW(SWSWSESWSSSS(WNWNWNEE(NWWNWWSSWNNNWSWNNNW(NENWESWS|)SSSS(SENESSESENE(SS(E(N|E)|WWWWN(NWSWWSEE(WWNEENSWWSEE|)|E))|NN)|WNNWNE)|S)|EEENEENWWWN(WSSEWNNE|)ENEES(ESE(SSW(N|WW)|NNNW(WNEENWWW(SW(N|WS(EE|S))|NENEE(SWEN|)NNWN(ENWNENNNNW(W|S)|WWSES(WSNE|)E))|S))|W))|NNNNNWWW(WNEEEE|SS(EENWESWW|)S))|N)))|NNNWNENNNWWNNESENNNNNNWSSWNNWWSWSSSSWWSSWWNNW(SSWNW(NEWS|)SS(EES(W|ENESS(WW|ESSEENNEEE(SSESWWNNWSSWW(EENNESNWSSWW|)|NWWNWW(NEEE(SEESNWWN|)NNNW(SSWWEENN|)NNE(SESENSWNWN|)N|WSE(SS|E)))))|WN(N|WW))|NNENEESS(ENNNWWWWNWWNENNNNEESWSSSEES(EENWNNENWNW(SSWSEWNENN|)NWNNWNWW(SSE(N|ESWWSW(SW(SSE(SSWSW(WN(EN(E|NN)|W)|SEENEES(E|W))|EN(W|N))|N)|N))|NEEEENWW(W|NNESENNWN(EESEESSSSWNNW(NEWS|)SSSESWS(WNNWESSE|)SEES(W|SSS(W|S(S|EEEENNE(NNNWSSWSWS(E|WNNENNNE(EENWWWWW(NEENNNW(NNESEENE(SSSSWW(SEE|NENW)|NWW(WNENEE(SWEN|)NWNWNWNNNWNWNWSWNNNNWW(SSE(N|S(W|SSES(W|ESWSSSESEE(SSWWNE|EN(NWW(SEWN|)WNENE(NWNWESES|)S|E)))))|NEEESENESSEEESE(SSSWNNWW(N(E|W(WNWSNESE|)S)|SESSSENESS(W|S))|NNNWWW(SEEWWN|)NENNESSENNNWWWN(ENEE(SWEN|)N|WWSSWNNNNE(S|NNWWNNNWW(NN(EESWENWW|)N(WSNE|)N|SSSWWSESSWSSESWS(ES(WSS(ENSW|)WWWWW|EENWNEE(SSENEE(SWEN|)N(ESNW|)N|NNWW(SEWN|)(W|NNEN(NNN|W|E(SSWENN|)E))))|WNWWNEENNN(E|NWWNEN(E(N|EE|S)|WWS(WNSE|)SSSSENNESS(NNWSSWENNESS|)))))))))|S))|SS)|S(ESSNNW|)W)|SS))|SS))))|W(NWWS(E|W)|S))))|W)|W(SS|N|W))))))|N)))|N))|N)|NEN(NNE(S|ENWN(E|NWSW(SEWN|)(W|NNN)))|WWSWS(E|W)))|NNN(ESSNNW|)W))|W)))|EEE))|W))|N)|WN(E|W(NENSWS|)W)))|E)))|N)|NNNNWNWWS(E|WNN(EEEE(S|N)|NWNENWW(SWSES(W|SE(S|N))|N))))))))|W))|S(E|S))|WW)|S)|S)|N)|WW))|NNNW(WNEWSE|)S)|W)|WWWW(S|NNWNE(ESS|NWWW)))|NEEN(WW|E(E|N)))))|WSW(N|SWSEE(N|SW(SEEE(NWNSES|)EESS(E|SSSS(EEEE(N(E(N|ES(ENSW|)W)|W)|SS)|WWWN(WWSESEEESWWWSSWNW(SWSEEEEEEN(NWWSEWNEES|)ESSE(SWW(S|WN(W|E))|EN(WN|EESW))|NN(ESNW|)W)|EE)))|W)))))|WW))))))|W(S|NNEEN(EE|WNWSWWS(WW|E))))|WSWWSWNW(N|SWSSWSSWSWSSS(WWNWSW(SSS(WNSE|)EENENWWS(NEESWSNENWWS|)|NNENW(WSWWEENE|)NEN(EES(ENENWESWSW|)SW(SESNWN|)N|NNNWWWNWNENENN(EENEN(ESESE(SWW(WNE|SEE)|NNNW(NW(NEEE(SWEN|)NNE(SEWN|)NNNW(NEWS|)WWWSSESWSEENNENWW(EESWSSNNENWW|)|S)|S))|W)|WSWWS(WNW(SSEESWSW(N|SEEE(NWES|)EEES(W|S))|NEENES)|E))))|ENNE(S|E(E|N(W|NN))))))|W)|ENNESSS(SSEEE(SWWEEN|)(NN|EE)|WW)))|W)|N)|W))))|E(NEEENW(WWW|NEN(W|E(N|SSS(SWWWEEEN|)EENNWS)))|SS))|E)|N)))|SEEESE(NNWNSESS|)SWS(EE(SWSEENE(WSWWNEWSEENE|)|NN)|W))|W)|WWS(S|E))))))|NE(N|S)))|WNNNEN(E|WW))))|W))|N)|NWNNES)|W))|W)))|NNNNESSSENNN(SSSWNNSSENNN|))|NN(E(S|EN(W|ESEENNW(S|NNNNWWW(SEESNWWN|)NEEEENE(N|SESS(ENNESNWSSW|)SSWNW(NNESNWSS|)S))))|W))))|S)))|W)|W(NN|W))|E)|W(NEWS|)S))|SEESWSSSSWWSS(E(NEENSWWS|)SS|WNWW(SEWN|)NEEN(EENNNSSSWW|)W))))|N))|NN)|NENEN(WNNSSE|)EEE(N(W|EN(WNE|ES))|S(S|WW))))|NN))))|N)|N)|NNNENWNENNESSSSENEENEE(NWWNWSW(SEWN|)NNWWNNENESEEEEN(NWWW(SEEWWN|)NEEENWN(WWWWWSSW(NNNNN(E(EENNEWSSWW|)SS|NNNNNE)|SE(EENN(WSNE|)EE|SWSSSSS(NNNNNEWSSSSS|)))|EEE)|ESE(SWWSEESSWNWWNNWW(SEWN|)WW|N))|SSW(N|WWS(WWWSNEEE|)E)))|ESENNEEESSWW(NEWS|)SS(WNWESE|)(SS|EEN(W|E(S|ENWNEESE(NNNESSS(NNNWSSNNESSS|)|S(S|W)))))))|N)|NNESEE(NWN(WNENNENWWW(SESWSS|NNEEES(EENEENWNEESSEENNNW(NEEESSW(SSSWWWS(WW(NEWS|)WW|EESENENNEN(W|NNEEENEENN(WWS(WWN(WWWWWS(EEEESEE(WWNWWWEEESEE|)|WSWS(WNNWN(WSWNWWSSW(NN|SEEN(N|EESSS(ENNNSSSW|)(S|WN(N|WSWNWS))))|EE(S|E))|E))|E)|E)|EEESSWW(NEWS|)SESWSSENENESSWSES(WWWN(E|WNNNNWSSSWSW(SES(W|EE(NWNSES|)ESS(WNSE|)E(NN|S))|W(NNE(S|N(ESNW|)W)|W)))|E(NNNE(SSENEWSWNN|)NNW(W(NNNEEWWSSS|)W|S)|S)))))|N)|SS)|WW))|E)|S(S|W))))))|E))))|ESS(EN(ESNW|)N|W(WW|N))))))|NN(ENWESW|)WSWSWNN(N|E)))|S))))|E)|N)))|SWWSEESSWWWN(NNWSSSSE(E|SSW(SSS|N))|EE))|EE))|EE))|E(NN|E))|SS))|SEESS(S|EEE(NWWNEWSEES|)E))))|WS(WW|E(SWSEWNEN|)E))|E))))))|WNWWS(ESNW|)WNWWWW(SEEESNWWWN|)NEENN(WWS(E|W(NNNESEN(SWNWSSNNESEN|)|W))|ESSEEEE(WWWWNNSSEEEE|)))|SWWSSE(SSEWNN|)N))|N))|W)|SS(WNSE|)S))))))|NNNE(N(ESNW|)W|S))|E))))|S(E|SSW(WNENSWSE|)SEESWS(W(WWSSNNEE|)N|E))))|S))))$
diff --git a/day20.rb b/day20.rb
new file mode 100644
index 0000000..1b4fc78
--- /dev/null
+++ b/day20.rb
@@ -0,0 +1,48 @@
+r = File.read("day20")
+
+#r = "^ENNWSWW(NEWS|)SSSEEN(WNSE|)EE(SWEN|)NNN$"
+#r = "^WSSEESWWWNW(S|NENNEEEENN(ESSSSW(NWSW|SSEN)|WSWWN(E|WWS(E|SS))))$"
+
+r.gsub!(/^\^|\$$/, '')
+
+
+def dist(str)
+ seen = []
+ x = y = 0
+ str.chars.each { |c|
+ case c
+ when "E"; x += 1
+ when "W"; x -= 1
+ when "S"; y += 1
+ when "N"; y -= 1
+ end
+ seen << [x,y]
+ }
+ seen.uniq.size
+end
+
+p1 = 0
+p2 = 0
+
+stk = [""]
+r.chars.each { |c|
+ case c
+ when "E", "S", "W", "N"
+ stk.last << c
+ p1 = [p1, dist(stk.last)].max
+ p2 += 1 if dist(stk.last) > 1000
+ when "("
+ stk << stk.last.dup
+ when "|"
+ stk.pop
+ stk << stk.last.dup
+ when ")"
+ stk.pop
+ end
+}
+
+p p1 # 3788
+p p2 # 8568
+
+# 9558 too high
+# 9557 too high
diff --git a/day21 b/day21
new file mode 100644
index 0000000..f2d4b98
--- /dev/null
+++ b/day21
@@ -0,0 +1,32 @@
+#ip 1
+seti 123 0 5
+bani 5 456 5
+eqri 5 72 5
+addr 5 1 1
+seti 0 0 1
+seti 0 3 5
+bori 5 65536 4
+seti 13284195 4 5
+bani 4 255 3
+addr 5 3 5
+bani 5 16777215 5
+muli 5 65899 5
+bani 5 16777215 5
+gtir 256 4 3
+addr 3 1 1
+addi 1 1 1
+seti 27 1 1
+seti 0 5 3
+addi 3 1 2
+muli 2 256 2
+gtrr 2 4 2
+addr 2 1 1
+addi 1 1 1
+seti 25 2 1
+addi 3 1 3
+seti 17 1 1
+setr 3 7 4
+seti 7 3 1
+eqrr 5 0 3
+addr 3 1 1
+seti 5 3 1
diff --git a/day21.rb b/day21.rb
new file mode 100644
index 0000000..a64a16a
--- /dev/null
+++ b/day21.rb
@@ -0,0 +1,67 @@
+insn = [:eqri, :seti, :eqir, :eqrr, :addi, :setr, :gtrr, :gtir, :muli, :bori, :bani, :borr, :gtri, :banr, :addr, :mulr]
+
+def op(cmd, regs)
+ regs2 = regs.dup
+
+ case cmd[0]
+ when :addr; regs2[cmd[3]] = regs[cmd[1]] + regs[cmd[2]]
+ when :addi; regs2[cmd[3]] = regs[cmd[1]] + cmd[2]
+ when :mulr; regs2[cmd[3]] = regs[cmd[1]] * regs[cmd[2]]
+ when :muli; regs2[cmd[3]] = regs[cmd[1]] * cmd[2]
+ when :banr; regs2[cmd[3]] = regs[cmd[1]] & regs[cmd[2]]
+ when :bani; regs2[cmd[3]] = regs[cmd[1]] & cmd[2]
+ when :borr; regs2[cmd[3]] = regs[cmd[1]] | regs[cmd[2]]
+ when :bori; regs2[cmd[3]] = regs[cmd[1]] | cmd[2]
+ when :setr; regs2[cmd[3]] = regs[cmd[1]]
+ when :seti; regs2[cmd[3]] = cmd[1]
+ when :gtir; regs2[cmd[3]] = cmd[1] > regs[cmd[2]] ? 1 : 0
+ when :gtri; regs2[cmd[3]] = regs[cmd[1]] > cmd[2] ? 1 : 0
+ when :gtrr; regs2[cmd[3]] = regs[cmd[1]] > regs[cmd[2]] ? 1 : 0
+ when :eqri; regs2[cmd[3]] = regs[cmd[1]] == cmd[2] ? 1 : 0
+ when :eqir; regs2[cmd[3]] = cmd[1] == regs[cmd[2]] ? 1 : 0
+ when :eqrr; regs2[cmd[3]] = regs[cmd[1]] == regs[cmd[2]] ? 1 : 0
+ end
+
+ regs2
+end
+
+rip, *program = File.readlines("day21")
+
+rip = rip.scan(/\d/)[0].to_i
+
+program.map! { |line|
+ o,a,b,c = line.split
+ [o.to_sym, a.to_i, b.to_i, c.to_i]
+}
+
+regs = [0]*6
+regs[0] = 0
+ip = 0
+
+or5 = 0
+
+seen = []
+
+# 3_000_000.times {
+loop {
+ break if ip < 0 || ip >= program.size
+
+ regs[rip] = ip
+ regs = op(program[ip], regs)
+
+ if program[ip][0] == :eqrr
+ p regs[5]
+ if seen.include? regs[5]
+ break
+ end
+ seen << regs[5]
+ end
+
+ ip = regs[rip] + 1
+}
+
+p regs
+p seen
+
+# 7224964
+# 13813247 first before duplicate
diff --git a/day22 b/day22
new file mode 100644
index 0000000..0426b39
--- /dev/null
+++ b/day22
@@ -0,0 +1,2 @@
+depth: 11739
+target: 11,718
diff --git a/day22.rb b/day22.rb
new file mode 100644
index 0000000..e1cb1a8
--- /dev/null
+++ b/day22.rb
@@ -0,0 +1,34 @@
+DEPTH = 11739
+TX, TY = 11, 718
+
+#DEPTH = 510
+#TX, TY = 10, 10
+
+$GI = {}
+def gi(x,y)
+ $GI[[x,y]] ||=
+ if (x == 0 && y == 0) || (x == TX && y == TY)
+ 0
+ elsif y == 0
+ x * 16807
+ elsif x == 0
+ y * 48271
+ else
+ el(x-1,y) * el(x,y-1)
+ end
+end
+
+def el(x,y)
+ (gi(x,y) + DEPTH) % 20183
+end
+
+p gi(0,0)
+p el(1,1)
+
+p1 = 0
+(0..TX).each { |x|
+ (0..TY).each { |y|
+ p1 += el(x,y)%3
+ }
+}
+p p1 # 8735
diff --git a/day23 b/day23
new file mode 100644
index 0000000..47b4554
--- /dev/null
+++ b/day23
@@ -0,0 +1,1000 @@
+pos=<-22356506,24819383,19709017>, r=53389427
+pos=<-17754746,29336035,-6021399>, r=68469044
+pos=<-28773573,22083066,35754706>, r=73115842
+pos=<-42043810,-4459593,13364132>, r=84568654
+pos=<1377848,7981572,-53489987>, r=95559952
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+pos=<45571672,39708352,55410440>, r=89261119
+pos=<-3973530,28214854,57251942>, r=75944882
diff --git a/day23.rb b/day23.rb
new file mode 100644
index 0000000..d946376
--- /dev/null
+++ b/day23.rb
@@ -0,0 +1,21 @@
+file = File.read("day23")
+
+bots = file.lines.map { |l|
+ l.scan(/<(-?\d+),(-?\d+),(-?\d+)>.*r=(-?\d+)/).first.map(&:to_i)
+}
+
+strongest = bots.max_by { |x,y,z,w| w }
+
+p bots.count { |x,y,z,w|
+ ((x-strongest[0]).abs +
+ (y-strongest[1]).abs +
+ (z-strongest[2]).abs) <= strongest[3]
+} # 577
+
+
+p bots.map { |b| b[0] }.sum
+p bots.map { |b| b[1] }.sum
+p bots.map { |b| b[2] }.sum
+
+# 16933511,19092135,15403726
+# 51429372
diff --git a/day24 b/day24
new file mode 100644
index 0000000..b5339c9
--- /dev/null
+++ b/day24
@@ -0,0 +1,23 @@
+Immune System:
+1466 units each with 7549 hit points (weak to fire, bludgeoning) with an attack that does 49 fire damage at initiative 1
+8647 units each with 6003 hit points (weak to radiation, cold) with an attack that does 6 cold damage at initiative 3
+2777 units each with 7460 hit points (weak to fire; immune to slashing) with an attack that does 24 bludgeoning damage at initiative 7
+470 units each with 1938 hit points (weak to fire, cold) with an attack that does 40 cold damage at initiative 18
+4203 units each with 6288 hit points (immune to fire) with an attack that does 13 cold damage at initiative 9
+2975 units each with 4211 hit points (immune to slashing) with an attack that does 14 slashing damage at initiative 20
+123 units each with 10083 hit points (immune to radiation; weak to fire) with an attack that does 777 bludgeoning damage at initiative 15
+3455 units each with 6391 hit points (weak to radiation, slashing; immune to cold, bludgeoning) with an attack that does 16 bludgeoning damage at initiative 19
+4323 units each with 4880 hit points (weak to cold; immune to radiation) with an attack that does 10 slashing damage at initiative 14
+1586 units each with 3567 hit points (weak to bludgeoning, radiation; immune to slashing, cold) with an attack that does 17 radiation damage at initiative 4
+
+Infection:
+5380 units each with 18316 hit points with an attack that does 5 slashing damage at initiative 17
+6230 units each with 12274 hit points (weak to slashing) with an attack that does 3 fire damage at initiative 16
+214 units each with 27761 hit points (weak to bludgeoning) with an attack that does 233 fire damage at initiative 11
+1515 units each with 47688 hit points (weak to slashing; immune to radiation) with an attack that does 49 cold damage at initiative 8
+268 units each with 44231 hit points with an attack that does 259 fire damage at initiative 6
+2318 units each with 22996 hit points with an attack that does 18 fire damage at initiative 5
+9492 units each with 19449 hit points (weak to bludgeoning, slashing; immune to cold) with an attack that does 4 radiation damage at initiative 13
+1113 units each with 39287 hit points with an attack that does 69 fire damage at initiative 12
+1382 units each with 15277 hit points (weak to radiation, fire) with an attack that does 19 cold damage at initiative 2
+2101 units each with 25567 hit points with an attack that does 17 slashing damage at initiative 10
diff --git a/day25 b/day25
new file mode 100644
index 0000000..761b364
--- /dev/null
+++ b/day25
@@ -0,0 +1,1315 @@
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+-4,-2,2,2
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+-1,-4,4,1
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diff --git a/day25.rb b/day25.rb
new file mode 100644
index 0000000..5b51602
--- /dev/null
+++ b/day25.rb
@@ -0,0 +1,34 @@
+d = File.readlines("day25").map { |x| x.split(",").map(&:to_i) }
+
+class DSU
+
+ def initialize(x)
+ @array = Array.new(x) {|i| i }
+ end
+
+ def find(x)
+ return x if @array[x] == x
+ @array[x] = find(@array[x])
+ end
+
+ def union(a, b)
+ @array[find(a)] = @array[find(b)]
+ end
+
+ def sets
+ @array.collect{ |i| find(i) }.uniq.length
+ end
+
+end
+
+dsu = DSU.new(d.size)
+
+(0...d.size).each { |i|
+ (i+1...d.size).each { |j|
+ if d[i].zip(d[j]).map { |(a,b)| (a-b).abs }.sum <= 3
+ dsu.union(i, j)
+ end
+ }
+}
+
+p dsu.sets