Day 05

4 files changed, 572 insertions, 0 deletions

diff --git a/day05/input b/day05/input
new file mode 100644
index 0000000..85131c9
--- /dev/null
+++ b/day05/input
@@ -0,0 +1,511 @@
+            [L] [M]         [M]    
+        [D] [R] [Z]         [C] [L]
+        [C] [S] [T] [G]     [V] [M]
+[R]     [L] [Q] [B] [B]     [D] [F]
+[H] [B] [G] [D] [Q] [Z]     [T] [J]
+[M] [J] [H] [M] [P] [S] [V] [L] [N]
+[P] [C] [N] [T] [S] [F] [R] [G] [Q]
+[Z] [P] [S] [F] [F] [T] [N] [P] [W]
+ 1   2   3   4   5   6   7   8   9 
+
+move 7 from 3 to 9
+move 5 from 8 to 9
+move 3 from 9 to 5
+move 6 from 9 to 2
+move 9 from 9 to 3
+move 3 from 7 to 3
+move 8 from 2 to 3
+move 9 from 3 to 1
+move 11 from 3 to 8
+move 5 from 6 to 9
+move 1 from 6 to 3
+move 1 from 2 to 7
+move 1 from 4 to 8
+move 1 from 3 to 9
+move 4 from 4 to 3
+move 6 from 8 to 3
+move 2 from 8 to 2
+move 4 from 9 to 3
+move 3 from 2 to 5
+move 2 from 5 to 4
+move 5 from 3 to 4
+move 11 from 1 to 4
+move 1 from 7 to 6
+move 1 from 3 to 5
+move 2 from 1 to 9
+move 1 from 1 to 4
+move 7 from 5 to 8
+move 21 from 4 to 6
+move 6 from 6 to 2
+move 6 from 8 to 9
+move 5 from 8 to 5
+move 2 from 2 to 7
+move 4 from 3 to 7
+move 1 from 2 to 6
+move 1 from 2 to 5
+move 2 from 2 to 7
+move 4 from 3 to 7
+move 1 from 4 to 6
+move 9 from 5 to 3
+move 7 from 3 to 4
+move 7 from 7 to 3
+move 7 from 4 to 1
+move 8 from 3 to 5
+move 1 from 3 to 5
+move 3 from 8 to 2
+move 2 from 2 to 9
+move 13 from 9 to 4
+move 5 from 5 to 3
+move 4 from 7 to 6
+move 1 from 7 to 4
+move 2 from 4 to 2
+move 3 from 3 to 4
+move 2 from 5 to 2
+move 6 from 1 to 7
+move 1 from 2 to 8
+move 1 from 3 to 8
+move 1 from 1 to 6
+move 1 from 3 to 4
+move 1 from 2 to 6
+move 24 from 6 to 1
+move 3 from 2 to 3
+move 3 from 3 to 5
+move 2 from 8 to 6
+move 2 from 5 to 4
+move 3 from 5 to 1
+move 7 from 4 to 8
+move 3 from 8 to 9
+move 2 from 9 to 5
+move 2 from 6 to 3
+move 1 from 9 to 8
+move 5 from 7 to 5
+move 2 from 3 to 1
+move 1 from 7 to 1
+move 7 from 4 to 7
+move 2 from 4 to 8
+move 6 from 8 to 6
+move 3 from 6 to 9
+move 10 from 5 to 1
+move 7 from 7 to 1
+move 1 from 4 to 9
+move 1 from 6 to 3
+move 2 from 9 to 7
+move 1 from 4 to 2
+move 1 from 9 to 5
+move 1 from 8 to 5
+move 39 from 1 to 8
+move 1 from 2 to 5
+move 2 from 6 to 9
+move 3 from 9 to 5
+move 3 from 1 to 6
+move 1 from 7 to 2
+move 1 from 3 to 2
+move 2 from 6 to 2
+move 3 from 2 to 3
+move 1 from 6 to 2
+move 1 from 1 to 8
+move 3 from 1 to 2
+move 3 from 2 to 4
+move 2 from 4 to 5
+move 2 from 3 to 8
+move 8 from 5 to 2
+move 8 from 8 to 2
+move 15 from 2 to 7
+move 1 from 1 to 5
+move 25 from 8 to 7
+move 2 from 2 to 4
+move 2 from 4 to 3
+move 1 from 8 to 4
+move 2 from 4 to 6
+move 1 from 2 to 1
+move 26 from 7 to 2
+move 15 from 2 to 1
+move 7 from 8 to 9
+move 10 from 1 to 6
+move 10 from 7 to 2
+move 1 from 8 to 1
+move 5 from 9 to 8
+move 1 from 8 to 9
+move 2 from 6 to 9
+move 3 from 7 to 1
+move 1 from 7 to 1
+move 5 from 9 to 2
+move 1 from 3 to 1
+move 9 from 6 to 3
+move 1 from 6 to 1
+move 4 from 2 to 4
+move 3 from 4 to 8
+move 1 from 4 to 1
+move 9 from 3 to 1
+move 1 from 7 to 6
+move 9 from 2 to 5
+move 14 from 1 to 6
+move 1 from 3 to 8
+move 5 from 2 to 6
+move 8 from 1 to 8
+move 6 from 6 to 8
+move 14 from 6 to 7
+move 1 from 1 to 7
+move 10 from 5 to 4
+move 11 from 8 to 5
+move 15 from 7 to 1
+move 4 from 5 to 6
+move 4 from 8 to 9
+move 6 from 5 to 3
+move 1 from 6 to 9
+move 1 from 1 to 6
+move 1 from 5 to 8
+move 2 from 6 to 2
+move 6 from 1 to 5
+move 1 from 5 to 8
+move 2 from 5 to 4
+move 9 from 2 to 9
+move 13 from 9 to 8
+move 1 from 2 to 1
+move 1 from 4 to 8
+move 3 from 3 to 1
+move 2 from 4 to 5
+move 2 from 1 to 5
+move 1 from 9 to 3
+move 17 from 8 to 1
+move 3 from 3 to 2
+move 4 from 5 to 1
+move 2 from 2 to 4
+move 1 from 6 to 1
+move 1 from 2 to 8
+move 4 from 4 to 6
+move 1 from 5 to 9
+move 5 from 6 to 8
+move 1 from 5 to 4
+move 1 from 5 to 6
+move 3 from 8 to 6
+move 8 from 4 to 5
+move 32 from 1 to 7
+move 11 from 7 to 6
+move 8 from 5 to 3
+move 3 from 8 to 7
+move 6 from 3 to 9
+move 4 from 3 to 8
+move 5 from 8 to 2
+move 1 from 8 to 5
+move 11 from 6 to 3
+move 1 from 5 to 2
+move 2 from 8 to 6
+move 12 from 7 to 8
+move 2 from 6 to 2
+move 2 from 6 to 4
+move 5 from 2 to 5
+move 8 from 7 to 2
+move 2 from 7 to 1
+move 2 from 7 to 6
+move 5 from 5 to 4
+move 5 from 4 to 7
+move 5 from 8 to 2
+move 2 from 9 to 7
+move 5 from 8 to 4
+move 2 from 7 to 3
+move 2 from 9 to 3
+move 3 from 7 to 9
+move 1 from 1 to 8
+move 2 from 6 to 1
+move 2 from 9 to 8
+move 1 from 7 to 8
+move 1 from 2 to 5
+move 1 from 7 to 9
+move 7 from 4 to 3
+move 3 from 3 to 6
+move 5 from 8 to 6
+move 3 from 9 to 5
+move 16 from 3 to 1
+move 2 from 9 to 1
+move 7 from 1 to 8
+move 1 from 1 to 2
+move 5 from 8 to 2
+move 12 from 1 to 4
+move 1 from 3 to 5
+move 1 from 2 to 9
+move 1 from 9 to 4
+move 4 from 6 to 5
+move 5 from 6 to 1
+move 1 from 6 to 5
+move 1 from 1 to 4
+move 1 from 4 to 7
+move 1 from 3 to 7
+move 9 from 4 to 6
+move 2 from 7 to 8
+move 1 from 3 to 4
+move 2 from 8 to 9
+move 4 from 8 to 4
+move 4 from 2 to 8
+move 2 from 9 to 7
+move 2 from 7 to 8
+move 10 from 2 to 4
+move 1 from 2 to 1
+move 5 from 4 to 7
+move 1 from 1 to 3
+move 3 from 8 to 7
+move 6 from 7 to 2
+move 3 from 2 to 7
+move 1 from 6 to 7
+move 5 from 5 to 8
+move 4 from 1 to 3
+move 4 from 3 to 1
+move 8 from 4 to 2
+move 1 from 3 to 2
+move 2 from 7 to 2
+move 2 from 6 to 3
+move 4 from 7 to 2
+move 4 from 5 to 7
+move 14 from 2 to 7
+move 3 from 2 to 1
+move 3 from 8 to 2
+move 1 from 5 to 7
+move 6 from 2 to 4
+move 2 from 2 to 7
+move 2 from 3 to 6
+move 6 from 8 to 2
+move 4 from 6 to 4
+move 2 from 6 to 9
+move 4 from 4 to 2
+move 2 from 4 to 8
+move 10 from 7 to 2
+move 18 from 2 to 6
+move 2 from 2 to 6
+move 2 from 9 to 2
+move 2 from 8 to 5
+move 1 from 2 to 9
+move 1 from 2 to 9
+move 1 from 5 to 7
+move 1 from 2 to 6
+move 2 from 9 to 2
+move 6 from 7 to 3
+move 7 from 6 to 8
+move 5 from 7 to 2
+move 1 from 7 to 4
+move 1 from 5 to 7
+move 4 from 8 to 7
+move 5 from 2 to 3
+move 1 from 7 to 5
+move 2 from 2 to 8
+move 9 from 4 to 3
+move 13 from 6 to 8
+move 10 from 3 to 1
+move 1 from 5 to 2
+move 3 from 6 to 8
+move 5 from 1 to 2
+move 1 from 1 to 8
+move 2 from 4 to 3
+move 17 from 8 to 6
+move 5 from 6 to 3
+move 3 from 1 to 2
+move 9 from 6 to 5
+move 2 from 6 to 8
+move 5 from 5 to 9
+move 3 from 9 to 8
+move 3 from 1 to 3
+move 3 from 7 to 5
+move 6 from 5 to 8
+move 7 from 2 to 4
+move 1 from 6 to 3
+move 1 from 1 to 5
+move 4 from 4 to 5
+move 2 from 2 to 9
+move 3 from 1 to 3
+move 4 from 5 to 8
+move 1 from 4 to 5
+move 6 from 8 to 7
+move 1 from 5 to 2
+move 4 from 9 to 2
+move 2 from 5 to 9
+move 2 from 1 to 8
+move 2 from 4 to 9
+move 6 from 7 to 5
+move 3 from 5 to 2
+move 3 from 2 to 5
+move 10 from 8 to 3
+move 2 from 8 to 5
+move 3 from 2 to 5
+move 6 from 5 to 1
+move 4 from 5 to 6
+move 1 from 7 to 5
+move 23 from 3 to 7
+move 2 from 5 to 9
+move 2 from 1 to 5
+move 2 from 6 to 3
+move 6 from 3 to 1
+move 1 from 1 to 7
+move 4 from 3 to 1
+move 1 from 8 to 5
+move 2 from 9 to 2
+move 3 from 3 to 8
+move 2 from 6 to 8
+move 12 from 1 to 3
+move 1 from 9 to 7
+move 3 from 5 to 9
+move 9 from 3 to 8
+move 1 from 1 to 7
+move 1 from 9 to 4
+move 3 from 3 to 6
+move 3 from 2 to 1
+move 3 from 8 to 6
+move 1 from 4 to 2
+move 1 from 2 to 9
+move 1 from 2 to 7
+move 20 from 7 to 5
+move 3 from 7 to 3
+move 3 from 1 to 3
+move 5 from 8 to 1
+move 5 from 1 to 5
+move 4 from 5 to 2
+move 3 from 2 to 6
+move 3 from 8 to 7
+move 1 from 2 to 6
+move 2 from 8 to 6
+move 2 from 7 to 5
+move 2 from 3 to 6
+move 12 from 5 to 1
+move 6 from 5 to 7
+move 12 from 6 to 8
+move 4 from 9 to 3
+move 4 from 5 to 8
+move 3 from 1 to 5
+move 4 from 7 to 4
+move 3 from 5 to 9
+move 7 from 1 to 6
+move 1 from 1 to 3
+move 6 from 7 to 6
+move 1 from 1 to 3
+move 10 from 3 to 6
+move 10 from 6 to 2
+move 2 from 9 to 5
+move 4 from 6 to 5
+move 9 from 6 to 1
+move 16 from 8 to 7
+move 3 from 8 to 7
+move 1 from 8 to 1
+move 7 from 2 to 1
+move 1 from 5 to 9
+move 1 from 6 to 1
+move 2 from 2 to 1
+move 3 from 1 to 4
+move 1 from 6 to 8
+move 7 from 4 to 1
+move 1 from 8 to 2
+move 22 from 1 to 8
+move 18 from 7 to 9
+move 6 from 5 to 2
+move 2 from 2 to 7
+move 2 from 1 to 5
+move 4 from 7 to 6
+move 1 from 5 to 6
+move 2 from 8 to 2
+move 3 from 2 to 6
+move 1 from 5 to 6
+move 15 from 9 to 6
+move 6 from 9 to 5
+move 1 from 9 to 8
+move 1 from 2 to 9
+move 5 from 5 to 9
+move 9 from 8 to 6
+move 3 from 2 to 7
+move 12 from 8 to 9
+move 1 from 7 to 5
+move 1 from 5 to 7
+move 3 from 7 to 1
+move 17 from 6 to 3
+move 1 from 2 to 6
+move 2 from 1 to 4
+move 16 from 6 to 4
+move 7 from 4 to 6
+move 1 from 5 to 7
+move 8 from 4 to 5
+move 9 from 9 to 8
+move 16 from 3 to 7
+move 1 from 1 to 5
+move 3 from 5 to 1
+move 5 from 6 to 2
+move 3 from 1 to 7
+move 3 from 6 to 7
+move 3 from 9 to 3
+move 5 from 8 to 5
+move 11 from 5 to 7
+move 2 from 3 to 7
+move 1 from 2 to 1
+move 1 from 3 to 6
+move 17 from 7 to 9
+move 1 from 3 to 2
+move 3 from 4 to 6
+move 1 from 1 to 2
+move 1 from 6 to 4
+move 14 from 7 to 6
+move 15 from 9 to 6
+move 4 from 8 to 7
+move 1 from 4 to 7
+move 7 from 9 to 5
+move 5 from 2 to 9
+move 7 from 5 to 1
+move 3 from 1 to 7
+move 29 from 6 to 4
+move 1 from 2 to 4
+move 18 from 4 to 2
+move 3 from 1 to 4
+move 1 from 1 to 7
+move 18 from 2 to 4
+move 3 from 6 to 5
+move 15 from 4 to 1
+move 1 from 5 to 1
+move 1 from 5 to 4
+move 9 from 4 to 1
+move 5 from 1 to 3
+move 9 from 1 to 5
+move 2 from 4 to 3
+move 5 from 5 to 6
+move 3 from 7 to 9
+move 7 from 7 to 5
+move 6 from 4 to 6
+move 2 from 3 to 7
+move 6 from 5 to 8
+move 2 from 8 to 4
+move 1 from 8 to 9
+move 9 from 6 to 2
+move 3 from 9 to 3
+move 1 from 2 to 1
+move 6 from 7 to 4
+move 2 from 2 to 8
+move 3 from 9 to 5
+move 5 from 4 to 8
+move 1 from 6 to 9
+move 1 from 3 to 1
+move 1 from 3 to 4
+move 1 from 6 to 5
+move 1 from 9 to 3
+move 10 from 8 to 7
+move 3 from 9 to 2
+move 7 from 2 to 4
+move 6 from 5 to 7
+move 4 from 5 to 8
+move 7 from 3 to 2
+move 3 from 7 to 1
+move 9 from 1 to 5
+move 5 from 7 to 9
+move 7 from 1 to 4
+move 11 from 4 to 2
+move 4 from 8 to 3
+move 5 from 4 to 7
+move 4 from 4 to 1
+move 1 from 3 to 6
+move 12 from 7 to 4
+move 2 from 1 to 8
+move 5 from 9 to 7
+move 7 from 5 to 6
+move 1 from 1 to 4
+move 1 from 9 to 8
+move 1 from 4 to 7
+move 1 from 8 to 9
+move 5 from 7 to 9
+move 2 from 7 to 5
+move 2 from 6 to 3
+move 5 from 2 to 7
+move 1 from 7 to 8
+move 1 from 1 to 6
+move 3 from 5 to 1
diff --git a/day05/part1.rb b/day05/part1.rb
new file mode 100644
index 0000000..d582dce
--- /dev/null
+++ b/day05/part1.rb
@@ -0,0 +1,28 @@
+lines = $stdin.readlines
+
+brk = lines.index(?\n)
+stackin = lines[0..(brk-2)]
+movein = lines[(brk+1)..-1]
+
+numstacks = lines[brk-1].split[-1].to_i
+stacks = Array.new(numstacks) { [] }
+
+stackin.reverse.each do |rank|
+  stack = 0
+  until rank.empty? do
+    stacks[stack] << rank[1] if rank[0] == ?[
+    rank = rank[4..-1]
+    stack += 1
+  end
+end
+
+movein.each do |istr|
+  n, f, t = istr.scan(/\Amove (\d+) from (\d+) to (\d+)\Z/)[0].map(&:to_i)
+  f -= 1
+  t -= 1
+  n.times do
+    stacks[t].push(stacks[f].pop)
+  end
+end
+
+puts stacks.map(&:pop).join
diff --git a/day05/part2.rb b/day05/part2.rb
new file mode 100644
index 0000000..ae17888
--- /dev/null
+++ b/day05/part2.rb
@@ -0,0 +1,24 @@
+lines = $stdin.readlines
+
+brk = lines.index(?\n)
+stackin = lines[0..(brk-2)]
+movein = lines[(brk+1)..-1]
+
+numstacks = lines[brk-1].split[-1].to_i
+stacks = Array.new(numstacks) { [] }
+
+stackin.reverse.each do |rank|
+  stack = 0
+  until rank.empty? do
+    stacks[stack] << rank[1] if rank[0] == ?[
+    rank = rank[4..-1]
+    stack += 1
+  end
+end
+
+movein.each do |istr|
+  n, f, t = istr.scan(/\Amove (\d+) from (\d+) to (\d+)\Z/)[0].map(&:to_i)
+  stacks[t-1].push(*stacks[f-1].pop(n))
+end
+
+puts stacks.map(&:pop).join
diff --git a/day05/test b/day05/test
new file mode 100644
index 0000000..84933bb
--- /dev/null
+++ b/day05/test
@@ -0,0 +1,9 @@
+    [D]    
+[N] [C]    
+[Z] [M] [P]
+ 1   2   3 
+
+move 1 from 2 to 1
+move 3 from 1 to 3
+move 2 from 2 to 1
+move 1 from 1 to 2