import numpy as np
a,b,c = map(int, input().split())
if a == 0:
    if b == 0:
        print(0)
    else:
        print(1,c/b,sep='\n')
else:
    if b*b-4*a*c>=0:
        p,q=np.roots([a,b,c])
        if p>q:p,q=q,p
        if p!=q:
            print(2,p,q,sep='\n')
        else:
            print(1,p,sep='\n')
    else:
        print(0)