a, b, c = map(int, input().split())
d = b ** 2 - 4 * a * c
if d > 0:
    print(2)
    print((-b + d ** .5) / (2 * a))
    print((-b - d ** .5) / (2 * a))
elif d < 0:
    print(0)
else:
    print(1)
    print(-b / (2 * a))