require "./common.cr"

lines = File.read("day9_input").split "\n"
lines.pop

players = 463
last_points = 400

marbles = [ 0 ]
scores = Array(Int32).new(players, 0)
player = 0
pos = 0

(last_points).times do |i|
  i = i + 1
  if (i % 23 == 0)
    delete_at = (pos - 7 - marbles.size) % marbles.size

    puts "current: #{i}"
    puts "popping: #{marbles[delete_at]}"
    scores[player] += i
    scores[player] += marbles[delete_at]

    pos = delete_at
    marbles.delete_at delete_at
  else
    at = (pos + 2) % marbles.size
    marbles.insert at, i
    pos = marbles.index(i).not_nil!
  end
  
  puts marbles
  player = (player + 1) % players
end

puts scores.max