#include <iostream>

using namespace std;

int f(int x, int y) {
  cout << x << " " << y << '\n';
  cout.flush();
  int ans;
  cin >> ans;
  return ans;
}

int main()
{
    int x, y, num;
    x = 0; y = 199;
    while (1) {
      num = f(x, y);
      if (num < 0)
        ++x;
      else
        --y;
    }
    return 0;
}