#include <bits/stdc++.h>
using namespace std;
#define int long long
#define de(a) cout << #a << " = " << a << "\n"
#define deg(a) cout << #a << " = " << a << " "
const long double pi = acos(-1);
constexpr long double eps = 1e-12;
constexpr long long inf = 0x3f3f3f3f3f3f3f3f;
constexpr long long mod = 998244353;
constexpr int N = 1e6 + 10;
constexpr int dx[] = {0, 1, 0, -1}, dy[] = {1, 0, -1, 0};

void solve() {
    for (int i = 2023; i > 1923; i--) {
        cout << "? " << i << endl;
        int x;
        cin >> x;
        if (x) {
            cout << "! " << i << endl;
            return;
        }
    }
    cout << "! 1923" << endl;
}

signed main() {
    ios::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);

    int T = 1;
    cin >> T, cin.get();
    while (T--) {
        solve();
    }

    return 0;
}