a,b,c=input().split()
a,b,c=int(a),int(b),int(c)
d=pow(b,2)-(4*a*c)
if (d<0):
    print(0)
elif(a==0 and b==0 and c==0):
    print(1)
elif(d==0):
    print(1)
    a1=-(b/(2*a))
    print("%0.5f" % a1)
elif(d>0):
    print(2)
    d1=pow(d,1/2)
    a2=-(b+d1)/2*a
    a3=-(b-d1)/2*a
    if(a2>a3):
        a2,a3=a3,a2
    print("%0.5f" % a2)
    print("%0.5f" % a3)
    
    
