//http://codeforces.com/problemset/problem/727/C
//水 掌握一下互動題格式
#include<bits/stdc++.h>
using namespace std;
const int MAX=1e5+5;
int N,A[MAX];
int main()
{
    int S12,S13,S23,temp;
    cin>>N;
    cout<<"? 1 2\n";
    fflush(stdout);
    cin>>S12;
    cout<<"? 1 3\n";
    fflush(stdout);
    cin
 
>>S13;
    cout<<"? 2 3\n";
    fflush(stdout);
    cin>>S23;
    A[2]=(S12+S23-S13)/2;
    A[1]=S12-A[2],A[3]=S23-A[2];
    for (int i=4;i<=N;i++)
    {
        cout<<"? 2 "<<i<<'\n';
        fflush(stdout);
        cin>>temp;
        A[i]=temp-A[2];
    }
    cout
 
<<"! ";
    for (int i=1;i<=N;i++)
        cout<<A[i]<<' ';
    return 0;
}