import sys


def ask(x, y):
    print(x, y)
    d = int(input())
    if d == 0:
        sys.exit(0)
    return d


N = 10 ** 9
A = ask(0, 0)
B = ask(0, N)
X = (A + B - N) / 2
Y = A - X

ask(X, Y)