#include<bits/stdc++.h>
using namespace std;
using Int = long long;
//INSERT ABOVE HERE
Int ask(Int x,Int y){
  cout<<x<<" "<<y<<endl;
  Int d;
  cin>>d;
  if(d==0) exit(0);
  return d;
}
signed main(){
  Int l=-1,r=1e6;
  while(l+1<r){
    Int m=(l+r)>>1;
    if(ask(m,0)<ask(m+1,0)) r=m;
    else l=m;
  }
  Int x=(ask(l,0)<ask(r,0)?l:r);
  l=-1;r=1e6;
  while(l+1<r){
    Int m=(l+r)>>1;
    if(ask(x,m)<ask(x,m+1)) r=m;
    else l=m;
  }
  return 0;
}