import math
a,b,c=map(int,input().split())
d=(b*b)-(4*a*c)
if d<0:
    print(0)
elif d==0:
    print(1)
    e=b/(2*a)
    print(-1*e)
else:
    print(2)
    e=(-1*b)+math.sqrt(d)/(2*a)
    f=(-1*b)-math.sqrt(d)/(2*a)
    print(e)
    print(f)