#include<bits/stdc++.h>
using namespace std;
using ll = long long;

template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }

#define FOR(i,a,b) for(ll i=(a);i<(b);++i)
#define ALL(v) (v).begin(), (v).end()
#define p(s) cout<<(s)<<endl
#define p2(s, t) cout << (s) << " " << (t) << endl
#define br() p("")
#define pn(s) cout << (#s) << " " << (s) << endl
#define p_yes() p("Yes")
#define p_no() p("No")

const ll mod = 1e9 + 7;
const ll inf = 1e18;

void vprint(vector<ll> A){
    ll L = A.size();
    FOR(i, 0, L){
        if(i) cout << ' ';
        cout << A[i];
    }
    cout << endl;
}

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);

    ll left = 0;
    ll right = 100000;
    // x方向
    while(right-left>3){
        ll p0 = (2 * left + 1 * right) / 3;
        ll p1 = (1 * left + 2 * right) / 3;
        
        p2(p0, 0);
        ll d0; cin >> d0;
        if(d0==0) return 0;

        p2(p1, 0);
        ll d1; cin >> d1;
        if(d1==0) return 0;

        if(d0==d1){
            left = d0;
            right = d1;
        }
        else if(d0<d1){
            right = d1;
        }
        else{
            left = d0;
        }
    }
    ll center_x = (left+right)/2;

    // y方向
    left = 0;
    right = 100000;
    while(right-left>3){
        ll p0 = (2 * left + 1 * right) / 3;
        ll p1 = (1 * left + 2 * right) / 3;
        
        p2(center_x, p0);
        ll d0; cin >> d0;
        if(d0==0) return 0;

        p2(center_x, p1);
        ll d1; cin >> d1;
        if(d1==0) return 0;

        if(d0==d1){
            left = d0;
            right = d1;
        }
        else if(d0<d1){
            right = d1;
        }
        else{
            left = d0;
        }
    }
    ll center_y = (left+right)/2;
    
    return 0;
}