# -*- coding: utf-8 -*-
"""
No.513 宝探し２
https://yukicoder.me/problems/no/513

"""
import sys
from sys import stdin
input = stdin.readline


def check_distance(x, y):
    print(x, y, flush=True)
    dist = int(input())
    return dist


def main(args):
    dist = check_distance(0, 0)
    lx = 0
    rx = dist

    lx_update = True
    rx_update = True

    while dist != 0:
        if lx_update:
            ldist = check_distance(lx, dist - lx)
            lx_update = False
            if ldist == 0:
                break
        if rx_update:
            rdist = check_distance(rx, dist - rx)
            rx_update = False
            if rdist == 0:
                break

        if ldist == rdist:
            lx = (lx + rx) // 2
            lx_update = True
        elif ldist < rdist:
            rx = (lx + rx) // 2
            rx_update = True
        else:
            lx = (lx + rx) // 2
            lx_update = True


if __name__ == '__main__':
    main(sys.argv[1:])