#include <bits/stdc++.h>

using namespace std;

int query(int a, int b) {
    cout << a << " " << b << endl;
    cout.flush();
    cin >> a;
    return a;
}

int main() {
    #ifndef ONLINE_JUDGE
    //freopen("debug", "r", stdin);
    #endif // ONLINE_JUDGE

    int N = 200;

    int j = 0;
    for(int i=0; i<N; i++) {
        while(j < N) {
            int a = query(i, j);
            if(a == 0) return 0;

            if(a < 0) j++;
            else break;
        }
        j--;
    }

    return 0;
}