Day 01

day_01/second.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+input = File.read('./input').lines.map(&:to_i)
+
+input.each do |i|
+  input.each do |j|
+    next if i + j > 2020
+    rem = 2020 - i - j
+
+    if input.include? rem
+      puts i * j * rem 
+      return
+    end
+  end
+end