diff --git a/ruby/2017/1/problem.rb b/ruby/2017/1/problem.rb
new file mode 100644
index 0000000..b64b900
--- /dev/null
+++ b/ruby/2017/1/problem.rb
@@ -0,0 +1,8 @@
+array = STDIN.read.chomp.split("").map(&:to_i)
+part_1 = array.zip(array.rotate).select { |a, b| a == b }.map(&:first).sum
+
+puts "Part 1: #{part_1}"
+
+part_2 = array.zip(array.rotate(array.length / 2)).select { |a, b| a == b }.map(&:first).sum
+
+puts "Part 2: #{part_2}"