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

left_num = int(math.pow(b,2))
right_num = int(4*a*c)
a_bunbo=int(2*a)

if left_num== right_num:
	print(1)
	print(round(-b/a_bunbo,18))
elif left_num> right_num:
	print(2)
	print(round(-(b+math.sqrt(left_num- right_num))/a_bunbo,18))
	print(round(-(b-math.sqrt(left_num- right_num))/a_bunbo,18))

else:
	print(0)