def keisann(shokou:int,wa:list):
    ans=[shokou]
    for i in wa:
        ans+=[i-ans[-1]]
    return ans
n=int(input())
l=[]
for i in range(1,n):
    print(f'? {i} {i+1}')
    l+=[int(input())]
print(f'? 1 3')
k=int(input())
m=l[1]-l[0]
s=(k-m)//2
print('!',*keisann(s,l))