#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
const int N = 150 + 10;
int n, m, k;
ll ask(int x, int y) {
    cout << "? " << x << " " << y << endl;
    ll score = 0;
    // for(int i = 1; i <= k; i++) score += abs(::x[i] - x) + abs(::y[i] - y);
    cin >> score;
    return score;
}
int main() {
    cin >> n >> m >> k;
    // for(int i = 1; i <= k; i++) cin >> x[i] >> y[i];
    int u = 1, d = n - 1, l = 1, r = m - 1, x = n, y = m;

    while (u <= d || l <= r) {
        int m1 = (u + d) / 2, m2 = (l + r) / 2;

        if (u > d)
            m1 = 1;

        if (l > r)
            m2 = 1;

        ll v1 = ask(m1, m2);

        if (u <= d) {
            ll v2 = ask(m1 + 1, m2);

            if (v1 <= v2)
                x = m1, d = m1 - 1;
            else
                u = m1 + 1;
        }

        if (l <= r) {
            ll v3 = ask(m1, m2 + 1);

            if (v1 <= v3)
                y = m2, r = m2 - 1;
            else
                l = m2 + 1;
        }
    }

    ll ans = ask(x, y);
    cout << "! " << ans << endl;
    return 0;
}