[Conway sequence] Solution for conway sequence

Training/Medium/conway_sequence.rb

@@ -0,0 +1,40 @@
+# Solution for https://www.codingame.com/ide/puzzle/conway-sequence
+class ConwaySequence
+  attr_reader :first_number, :line_to_display, :sequence
+
+  def initialize(first_number, line_to_display)
+    @first_number = first_number
+    @line_to_display = line_to_display
+    @sequence = init_sequence
+  end
+
+  def init_sequence
+    Array.new(line_to_display).each_with_index.each_with_object({}) do |(_, index), sequence|
+      sequence[1] = [first_number] if index.zero?
+      last_line = sequence[index + 1]
+      sequence[index + 2] = next_line(last_line)
+    end
+  end
+
+  def next_line(last_line)
+    count = 0
+    last_line.each_with_index.each_with_object([]) do |(num, index), result|
+      count += 1
+      next if num == last_line[index + 1]
+
+      result << count
+      result << num
+      result.join(' ')
+      count = 0
+    end
+  end
+
+  def start
+    sequence[line_to_display].join(' ')
+  end
+end
+
+first_number = gets.to_i
+line_to_display = gets.to_i
+obj = ConwaySequence.new(first_number, line_to_display)
+print obj.start