#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  int size = n - (n % 2 == 0);
  n -= size;
  int b[size + n + 1];
  for (int i = 1; i < size; i++) {
    cout << '?' << ' ' << i << ' ' << i + 1 << endl;
    cout << flush;
    cin >> b[i];
  }
  cout << '?' << ' ' << 1 << ' ' << size << endl;
  cout << flush;
  cin >> b[size];
  int one = 1;
  for (int i = 1; i < size; i++) {
    b[size] -= one * b[i];
    one = -one;
  }
  b[size] /= 2;
  for (int i = size - 1; i >= 1; i--) {
    b[i] -= b[i + 1];
  }
  if (n) {
    cout << '?' << ' ' << 1 << ' ' << size + n << endl;
    cout << flush;
    int s;
    cin >> s;
    b[size + 1] = s - b[1];
  }
  cout << "! ";
  for (int i = 1; i <= size + n; i++) {
    cout << b[i] << ' ';
  }
  cout << flush;
  return 0;
}
