from math import sqrt
import sys
if len(sys.argv) < 4 or len(sys.argv) > 4:
    print "Podaj 3 argumenty dzialania"
else:
    delta = (int(sys.argv[2]) ** 2) - (4 * int(sys.argv[1]) * int(sys.argv[3]))
    if delta > 0:
        sqrtdelta = sqrt(delta)
        lm = 2
        m1 = (-(int(sys.argv[2])) - sqrtdelta)/(2*int(sys.argv[1]))
        m2 = (-(int(sys.argv[2])) + sqrtdelta)/(2*int(sys.argv[1]))
        print lm
        print m1, m2
    elif delta == 0:
        lm = 1
        m1 = (int(sys.argv[2]))/(2*int(sys.argv[1]))
        print lm
        print m1
    elif delta < 0:
        lm = 0
        print lm