from decimal import Decimal
import math
a,b,c = map(Decimal,input().split())
D = b * b - 4 * a * c;
if D > 0:
    print(2)
    print((-b+(b*b-4*a*c).sqrt())/(2*a))
    print((-b-(b*b-4*a*c).sqrt())/(2*a))
elif D == 0:
    print(1)
    print(-b/(2*a))
else:
    print(0)