1 files changed, 41 insertions, 0 deletions
diff --git a/14/a.rb b/14/a.rb
new file mode 100644
index 0000000..6dfab22
--- /dev/null
+++ b/14/a.rb
@@ -0,0 +1,41 @@
+lines = File.readlines('input.txt')
+
+one_mask = 0
+zero_mask = (1 << 36) - 1
+
+mem = Hash.new 0
+
+lines.each do |line|
+  if line.slice(0, 4) == 'mask'
+    mask = line.split(' = ')[1].strip
+    one_mask = 2
+    zero_mask = 3
+    mask.each_char do |c|
+      case c
+      when '1'
+        one_mask += 1
+      when '0'
+        zero_mask -= 1
+      end
+      one_mask *= 2
+      zero_mask *= 2
+      zero_mask += 1
+    end
+    one_mask >>= 1
+    zero_mask >>= 1
+  else
+    split = line.split(/\[|\] = /)
+    address = split[1].to_i
+    value = split[2].to_i
+    actual_value = (value & zero_mask) | one_mask
+    mem[address] = actual_value
+  end
+end
+
+sum = 0
+mem.each_value do |v|
+  sum += v
+  sum -= 1 << 36
+end
+
+puts sum