#include <bits/stdc++.h>
using namespace std;
int main() {
  int tt = 1;
  while (tt--) {
    int n;
    cin >> n;
    int a[n - 1];
    cout << "? 2 3" << endl << endl;
    int m;
    cin >> m;
    for (int i = 0; i < n - 1; i++) {
      cout << "? " << 1 << " " << i + 2 << endl << endl;
      cin >> a[i];
    }
    int b[n];
    for (int i = 2; i < n; i++) b[i] = a[i - 1] - a[i - 2];
    b[1] = m - b[2];
    b[0] = a[0] - b[1];
    cout << "! ";
    for (int i = 0; i < n; i++) cout << b[i] << " ";
    cout << endl;
  }
  return 0;
}
