n = int(input())

x = list()
y = list()

teziste = [0] * 2

for i in range(n):
    unos = str(input()).split()

    x.append(int(unos[0]))
    y.append(int(unos[1]))

    teziste[0] += x[i]
    teziste[1] += y[i]

teziste[0] /= n
teziste[1] /= n

for i in range(n):
    x[i] -= teziste[0]
    y[i] -= teziste[1]

    print(f"{x[i]:.2f} {y[i]:.2f}")