STDOUT.sync=true
m=gets.to_i.times{gets.split.map(&:to_f)}
puts '? 0 0'
dx,dy=gets.split.map(&:to_f)
puts '? 1 1'
cms,cps=gets.split.map(&:to_f)
cms-=dx
cps-=dy
c=(cms+cps)/2
s=(cps-cms)/2
puts '!'
m.each{|x,y|
	puts '%f %f'%[x*c-y*s+dx,x*s+y*c+dy]
}