#include <bits/stdc++.h>
#pragma GCC optimize("unroll-loops,no-stack-protector")
#pragma GCC target("sse,sse2,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
using namespace std;
const int MOD = 1e9 + 7;
const int INF32 = 1 << 30;
const long long INF64 = 1LL << 60;
void solve() {
  int n;
  cin >> n;
  int a[n - 1], f;
  for (int i = 0; i < n - 1; i++) {
    cout << "? 1 " << i + 2 << endl;
    int x;
    cin >> x;
    a[i] = x;
  }
  cout << "? 2 3" << endl;
  int x;
  cin >> x;
  cout << "! " << a[1] - x << ' ' << a[0] - a[1] + x;
  for (int i = 0; i < n - 2; i++) cout << ' ' << a[i + 1] - a[i];
}
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  solve();
  return 0;
}
