gurgeous · December 15, 2020 05:29
diff --git a/15.rb b/15.rb
 map = Hash.new { |h, v| h[v] = [] }
 val = nil
 (0...2020).each do |turns|
  val = if turns < data.length
    data[turns]
  elsif map[val].length >= 2
    map[val][-1] - map[val][-2]
  else
    0
  end
  map[val] << turns
 end
 p val
	map = Hash.new { \|h, v\| h[v] = [] }
	val = nil
	(0...2020).each do \|turns\|
	val = if turns < data.length
	data[turns]
	elsif map[val].length >= 2
	map[val][-1] - map[val][-2]
	else
	0
	end
	map[val] << turns
	end
	p val