import sys

def out(x):
    print("?",x)
    sys.stdout.flush()

    return int(input())


x1 = 100
y1 = out(x1)

if y1 == 99:
    print("!",y1,x1)
else:

    x2 = 100-y1-1
    y2 = out(x2)

    b = y2+1

    for i in range(b):
        if (x2+i)%b == y2:
            print("!",i,b)
            exit()