import numpy as np
a,b,c = map(int, input().split())
p,q=np.roots([a,b,c])
if type(p)==np.complex128:
    print(0)
elif p==q:
    print(1,p,sep='\n')
else:
    if p>q:
        p,q=q,p
    print(2,p,q,sep='\n')