1 files changed, 47 insertions, 0 deletions
diff --git a/2024/02b/run.rb b/2024/02b/run.rb
new file mode 100755
index 0000000..627bac4
--- /dev/null
+++ b/2024/02b/run.rb
@@ -0,0 +1,47 @@
+#!/usr/bin/env ruby
+
+
+def directions_for_values(values)
+  directions = []
+  values.each_with_index do |value, index|
+    next if index.zero?
+
+    distance = (value.to_i - values[index-1].to_i)
+    direction = if (distance.abs > 3 )
+                  :err
+                elsif distance > 0
+                  :up
+                elsif distance < 0
+                  :down
+                else
+                  :err
+                end
+
+    directions << direction
+  end
+
+  return 0 if directions.count(:err) > 1
+  directions.uniq.count == 1 ? 1 : 0
+end
+
+
+data = File.read("data.txt")
+
+data = data.split("\n")
+data = data.map(&:split)
+
+safe_arr = data.map do |row|
+  results = [directions_for_values(row)]
+
+  row.each_with_index do |value, index|
+    tmp_arr = row.dup
+    tmp_arr.delete_at(index)
+    results << directions_for_values(tmp_arr)
+  end
+
+  results
+end.map(&:sum)
+
+
+p safe_arr.count { |row| row > 0 }
+