change directory names

18/3/main.rb

@@ -0,0 +1,31 @@
+require 'pry'
+
+arr = Array.new(1000){Array.new(1000){{count: 0, id: nil}}}
+
+ids = Array.new
+dups = Array.new
+
+File.open("input", "r") do |f|
+  f.each_line do |line|
+    id = line[/\d+/].to_i
+    offset_left, offset_top = line[/\d+,\d+/].split(",").map(&:to_i)
+    width, height = line[/\d+x\d+/].split("x").map(&:to_i)
+
+    ids.push id
+
+    height.times do |y|
+      width.times do |x|
+        arr[offset_top + y][offset_left + x][:count] += 1
+        if arr[offset_top + y][offset_left + x][:id] != nil
+          dups.push arr[offset_top + y][offset_left + x][:id]
+          dups.push id
+        end
+        arr[offset_top + y][offset_left + x][:id] = id
+      end
+    end
+  end
+end
+
+puts arr.flatten.select{|a| a[:count] > 1}.count
+
+puts (ids - dups.uniq)