/* -*- coding: utf-8 -*-
 *
 * 3084.cc:  No.3084 Identify f(x) - yukicoder
 */

#include<cstdio>
#include<algorithm>

using namespace std;

/* constant */

/* typedef */

/* global variables */

/* subroutines */

int query(int x) {
  printf("? %d\n", x); fflush(stdout);
  int f;
  scanf("%d", &f);
  return f;
}

/* main */

int main() {
  int f0 = query(0), f1 = query(1);

  // f0=a*0+b=b, f1=a*1+b=a+b
  // -> b=f0, a=f1-b=f1-f0

  int a = f1 - f0, b = f0;
  printf("! %d %d\n", a, b); fflush(stdout);
  return 0;
}