J=lambda:map(int,input().split())
C=list(J())
L,R=J()
a=9**5
e=1/a
for i in range((R-L)*a+1):
	x=L+i*e
	a=min(a,abs(C[0]+(C[1]+(C[2]+C[3]*x)*x)*x))
print(a)