def send_query(x)
  STDOUT.puts("? #{x}")
  STDOUT.flush

  gets.to_i
end

c = send_query(100)

if c == 99
  STDOUT.puts("! 99 100")
else
  b = send_query(100 - c - 1) + 1
  a = (0...b).find { |x| (x + 100) % b == c }

  STDOUT.puts("! #{a} #{b}")
end

STDOUT.flush