#include <bits/stdc++.h>
using namespace std;
int n;
const int maxx = 1e3 + 5;
int a[maxx];
void hoi(int l, int r) { cout << "? " << l << " " << r << endl; }
int main() {
  cin >> n;
  int x, y, z;
  hoi(1, 2);
  cin >> x;
  hoi(1, 3);
  cin >> y;
  hoi(2, 3);
  cin >> z;
  a[1] = y - z;
  a[2] = x - a[1];
  a[3] = y - x;
  if (n == 3) {
    cout << "! ";
    for (int i = 1; i <= n; i++) {
      cout << a[i] << " ";
    }
    return 0;
  }
  for (int i = 4; i <= n; i++) {
    hoi(i - 1, i);
    cin >> x;
    a[i] = x - a[i - 1];
  }
  cout << "! ";
  for (int i = 1; i <= n; i++) {
    cout << a[i] << " ";
  }
  return 0;
}
