import sys

N = int(input())
ans = [0]*N

print(f'? 2 {N}')
res = int(input())
ans[0] = N*(N+1)//2-res

for i in range(N-2):
    print(f'? {1+i} {2+i}')
    res = int(input())
    ans[1+i] = res-ans[i]

ans[-1] = N*(N+1)//2-sum(ans)
s = ' '.join(map(str, ans))
print(f'! {s}')