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

int ask( int x, int y ) {
  cout << x << " " << y << endl;
  int d;
  cin >> d;
  if( d == 0 ) {
    exit( 0 );
  }
  return d;
}

signed main() {
  ios::sync_with_stdio( 0 );
  int ans_x, ans_y;
  {
    map< int, int > memo;
    int lb = 0, ub = int( 1e5 );
    while( ub - lb > 5 ) {
      int f = lb + ( ub - lb ) / 3;
      int g = lb + ( ub - lb ) / 3 * 2;
      int a = memo[ lb ] = memo.count( lb ) ? memo[ lb ] : ask( lb, 0 );
      int b = memo[ f ] = memo.count( f ) ? memo[ f ] : ask( f, 0 );
      int c = memo[ g ] = memo.count( g ) ? memo[ g ] : ask( g, 0 );
      int d = memo[ ub ] = memo.count( ub ) ? memo[ ub ] : ask( ub, 0 );
      if( a <= b and b <= c and c <= d ) {
        ub = f;
      } else if( a >= b and b <= c and c <= d ) {
        ub = g;
      } else if( a >= b and b >= c and c <= d ) {
        lb = f;
      } else if( a >= b and b >= c and c >= d ) {
        lb = g;
      } else {
        assert( 0 );
      }
    }
    int mind = int( 1e5 );
    for( int i = lb; i <= ub; ++i ) {
      int d = ask( i, 0 );
      if( d < mind ) {
        mind = d;
        ans_x = i;
      }
    }
  }
  {
    map< int, int > memo;
    int lb = 0, ub = int( 1e5 );
    while( ub - lb > 5 ) {
      int f = lb + ( ub - lb ) / 3;
      int g = lb + ( ub - lb ) / 3 * 2;
      int a = memo[ lb ] = memo.count( lb ) ? memo[ lb ] : ask( 0, lb );
      int b = memo[ f ] = memo.count( f ) ? memo[ f ] : ask( 0, f );
      int c = memo[ g ] = memo.count( g ) ? memo[ g ] : ask( 0, g );
      int d = memo[ ub ] = memo.count( ub ) ? memo[ ub ] : ask( 0, ub );
      if( a <= b and b <= c and c <= d ) {
        ub = f;
      } else if( a >= b and b <= c and c <= d ) {
        ub = g;
      } else if( a >= b and b >= c and c <= d ) {
        lb = f;
      } else if( a >= b and b >= c and c >= d ) {
        lb = g;
      } else {
        assert( 0 );
      }
    }
    int mind = int( 1e5 );
    for( int i = lb; i <= ub; ++i ) {
      int d = ask( 0, i );
      if( d < mind ) {
        mind = d;
        ans_y = i;
      }
    }
  }
  assert( ask( ans_x, ans_y ) == 0 );
  return 0;
}