
a,b,c = map(int,input().split())
D = pow(b,2) -4*a*c
e1 = (-b+pow(D,1/2))/2*a
e2 = (-b-pow(D,1/2))/2*a
r = 0
if D < 0:
    print(r)
    exit(0)
if D ==0:
    r = 1
    print(r,e1)
else:
    r = 2
    print(r,e2,e1)