#include <bits/stdc++.h>
using namespace std;
void solve() {}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  int t = 1;
  while (t--) {
    int n;
    cin >> n;
    int arr[n];
    int tot;
    cout << "? " << 1 << " " << n << endl;
    cin >> tot;
    for (int i = n - 1; i >= 2; i--) {
      int x;
      cout << "? " << 1 << " " << i << endl;
      cin >> x;
      arr[i] = tot - x;
      tot = x;
    }
    cout << "? " << 2 << " " << 3 << endl;
    int x;
    cin >> x;
    arr[1] = x - arr[2];
    arr[0] = tot - arr[1];
    cout << "! ";
    for (int i = 0; i < n; i++) cout << arr[i] << " ";
    cout << endl;
  }
  return 0;
}
