from math import sqrt

a,b,c=map(int,input().split())
D=b*b-4*a*c

if D<0:
    print(0)
elif D==0:
    print(1)
    print(-b/(2*a))
else:
    print(2)
    print((-b-sqrt(D))/(2*a))
    print((-b+sqrt(D))/(2*a))