#include <iostream>
#include <cstdio>
#include <algorithm>
#include <string>
#include <sstream>
using namespace std;

int ask(int x, int y) {
    cout << x << " " << y << "\n";
    cout.flush();
    int k;
    cin >> k;
    return k;
}

int main() {

    int l = 0, r = 199, md, answ;

    for (int i = 0; i < 200; i++) {
        l = 0;
        r = 199;
        while (l < r) {
            md = (l + r) / 2;
            answ = ask(i, md);
            if (answ == 0) return 0;
            if (answ > 0) {
                r = md - 1;
            } else {
                l = md + 1;
            }
        }
    }


    return 0;
}