# a,b,c=input("a b c").split()
# a=float(a)
# b=float(b)
# c=float(c)a=float(input("请输入a:"))
b=float(input("请输入b:"))
c=float(input("请输入c:"))
dert=b**2-4*a*c
if dert >= 0:x1=(-b+dert**0.5)/(2*a)x2=(-b-dert**0.5)/(2*a)print("x1:",x1)print("x2:",x2)
else:print("无解")