#include "pch.h"
#include <iostream>
#include <queue>
#include <string>
#include <iomanip>
#include <regex>
using namespace std;

int main() {
    cout.flush();
    double x, y, l, fun = 1000000, new_func = 100000000;
    double x1 = 0, y1 = 0;
    l = 0.749000;
    cout << "? 0 0" << endl;
    double eps = 0.000001;
    cin >> x >> y >> fun;
    while(true) {
        x1 = x1 - l * x;
        y1 = y1 - l * y;
        cout << fixed << setprecision(6) << "? " << x1 << " " << y1 << endl;
        if (abs(fun - new_func) <= eps)
            break;
        else {
            cin >> x >> y >> new_func;
            fun = new_func;
        }
    }
    cout << fixed << setprecision(6) << "! " << x1 << " " << y1 << endl;
    return 0;
}