from collections import *
from functools import *
from itertools import *
from heapq import *
import sys,math
input = sys.stdin.readline

print('? 100',flush=True)
y = int(input())
print(f'? {99-y}',flush=True)
B = int(input())+1
now = y
while now < 100:
    now += B
A = now-100
print('?',A,B,flush=True)