from math import sqrt

a,b,c = map(int,input().split())

if a == 0:
    x = -1*c/b
    if x == 0:
        print(x)
    else:
        print('1')
        print ("{0:.5f}".format(x))
if b == 0:
    x = -1*c/a
    if x <= 0:
        print('0')
    else:
        print('1')
        print ("{0:.5f}".format(sqrt(x)))

else:
    result = b**2 - 4*a*c
    if result<0:
        print('0')

    else:
        x = ((-1*b) - sqrt(result))/(2*a)
        y = ((-1*b) + sqrt(result))/(2*a)

        print(2)
        print("{0:.5f}".format(x))
        print("{0:.5f}".format(y))























        
