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

int main(){
  bool flag1=0,flag2=0;
  int minx=0,maxx=100000;
  cout<<minx<<" "<<0<<"\n";
  int d1;cin>>d1;
  if(d1==0)return 0;
  cout<<maxx<<" "<<0<<"\n";
  int d2;cin>>d2;
  if(d2==0)return 0;
  int leftdis=0,rightdis=0;
  if(d1>=d2){
    minx=(minx+maxx)/2;
    leftdis=0;
    rightdis=d2;
  }else{
    maxx=(minx+maxx)/2;
    leftdis=d1;
    rightdis=0;
  }
  int resx;
  while(maxx-minx>5){
    int mid=(minx+maxx)/2;
    cout<<mid<<" "<<0<<"\n";
    int d;cin>>d;
    if(d==0)return 0;
    if(leftdis==0){
      leftdis=d;
      if(leftdis>rightdis){
        leftdis=0;
        minx=mid;
      }else if(leftdis<rightdis){
        rightdis=0;
        maxx=mid;
      }else{
        resx=(mid+maxx)/2;
        flag1=1;
        break;
      }
    }else{
      rightdis=d;
      if(leftdis>rightdis){
        leftdis=0;
        minx=mid;
      }else if(leftdis<rightdis){
        rightdis=0;
        maxx=mid;
      }else{
        resx=(mid+minx)/2;
        flag1=1;
        break;
      }
    }
  }
  if(!flag1){
    resx=minx;
    int nowdis=999999999;
    for(int i=minx;i<=maxx;i++){
      cout<<i<<" "<<0<<"\n";
      int dd;cin>>dd;
      if(dd==0)return 0;
      if(dd<nowdis){
        nowdis=dd;
        resx=i;
      }
    }
  }
  cout<<resx<<" "<<0<<endl;
  int dd;cin>>dd;
  cout<<resx<<" "<<dd<<endl;
  return 0;
}