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))
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