N = int(input())
print('?',2,N,flush=True)
ANS = [N*(N+1)//2 - int(input())]
for i in range(1,N-1):
    print('?',i,i+1,flush=True)
    ANS.append(int(input())-ANS[-1])
ANS.append(N*(N+1)//2-sum(ANS))
print('!',*ANS)