#include <bits/stdc++.h>
#include<iostream>
#include<map>
#include<vector>
#include <algorithm>
#include<math.h>
#include <iomanip>
#include<set>
#include <numeric>
#include<string>
using ll = long long;
using namespace std;

int main()
{
    ll n, all;
    cin >> n;
    vector<ll> a(n);
    cout << "? 1 " << n << "\n";
    cin >> all;
    for (int i = 2; i <= n; i++){
        ll tmp;
        cout << "? " << i << " " << n << "\n";
        cin >> tmp;
        a[i-2] = all - tmp;
        all = tmp;
    }
    a[n-1] = all;
    string delim = "";
    cout << "! ";
    for (auto x : a){
        cout << delim << x;
        delim = " ";
    }
    cout << endl;
}