a = int(input())
b = int(input())
c = int(input())
if(b**2-4*a*c)>0:
	print((-b-(b**2-4*a*c)**(0.5))/(2*a),(-b+(b**2-4*a*c)**(0.5))/(2*a))
elif(b**2-4*a*c)<0:
	print("null")
elif(b**2-4*a*c)==0:
	print((-b-(b**2-4*a*c)**(0.5))/(2*a))