func main()
	var n: int :: cui@inputInt()
	var a: []int :: #[n]int
	
	do cui@print("? 1 3\n")
	do cui@flush()
	
	var s3: int :: cui@inputInt()
	
	do cui@print("? 2 3\n")
	do cui@flush()
	do a[0] :: s3 - cui@inputInt()
	
	do cui@print("? 1 2\n")
	do cui@flush()
	do a[2] :: s3 - cui@inputInt()
	do a[1] :: s3 - a[0] - a[2]
	
	var sum: int :: s3
	
	for i(4, n)
		do cui@print("? 1 2\n")
		do cui@flush()
		var v: int :: cui@inputInt()
		do a[i - 1] :: v - sum
		do sum :: v
	end for
	
	do cui@print("!")
	for i(0, n - 1)
		do cui@print(" \{a[i]}")
	end for
	do cui@print("\n")
	do cui@flush()
end func