#include <functional>
#include <iostream>

using namespace std;

int main(int argc, const char* argv[])
{
	int lowX = 0;
	//	int lowY  = 0;
	int highX = 100000;
	//	int highY = 100000;
	int x	= 0;
	int y	= 0;
	auto fxy = [](int x, int y) {
		cout << x << " " << y << endl;
		int d;
		cin >> d;
		return d;
	};
	auto fyx = [](int x, int y) {
		cout << y << " " << x << endl;
		int d;
		cin >> d;
		return d;
	};
	//	auto f = fxy;
	function<int(int, int)> f = fxy;
	int i = 0;
	for (int k = 0; k < 2; k++) {
		for (; i < 100; i++) {
			int ld = f(lowX, y);
			if (ld == 0) return 0;
			int hd = f(highX, y);
			if (hd == 0) return 0;
			if (ld < hd) {
				x = ld;
				highX -= (highX - lowX) / 2;
			}
			if (ld > hd) {
				x = hd;
				lowX += (highX - lowX) / 2;
			}
			if (ld == hd) {
				x = (ld + hd) / 2;
				break;
			}
		}
		if (i == 100) break;
		y	 = x;
		x	 = 0;
		lowX  = 0;
		highX = 100000;
		f	 = fyx;
		i++;
	}
	return 0;
}