#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int n;
int ask(int n)
{
    cout << "? " << n << endl;
    int x;
    cin >> x;
    return x;
}
void ans(int n)
{
    cout << "! " << n << endl;
}
void solve()
{
    int l, r;
    cin >> l >> r;
    ans(l + ask(l));
}
int main()
{
    int t;
    cin >> t;
    while (t--)
        solve();
    return 0;
}