#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  scanf("%d", &n);
  vector<long long> a(n + 1);
  long long tot, last;
  printf("? 1 %d\n", n);
  fflush(stdout);
  scanf("%lld", &tot);
  last = tot;
  for (int i = 2; i < n; i++) {
    printf("? %d %d\n", i, n);
    fflush(stdout);
    long long tmp;
    scanf("%lld", &tmp);
    a[i - 1] = last - tmp;
    last = tmp;
  }
  printf("? 1 %d\n", n - 1);
  fflush(stdout);
  scanf("%lld", &a[n]);
  a[n] = tot - a[n];
  a[n - 1] = last - a[n];
  printf("! ");
  for (int i = 1; i <= n; i++) printf("%lld ", a[i]);
  return 0;
}
