n = int(input())
ans = [0] * n
print(f"? 2 {n}")
lst = n * (n + 1) // 2
ans[0] = n * (n + 1) // 2 - int(input())
sm = ans[0]
for i in range(n - 2):
	print(f"? {i+1} {i+2}")
	ans[i+1] = int(input()) - ans[i]
	sm += ans[i]
ans[n-1] = n * (n + 1) // 2 - sm
print("!", *ans)