def f(x):
    return 5*x**3 - 2*x + 1

a = -1
b = 0
d = 1
while d > 0.0001:
    m = (a + b) / 2
    if f(m) > 0:
        b = m
    else:
        a = m
    d = b - a
print(a, b)