C0,C1,C2,C3=map(int,input().split())
L,R=map(int,input().split())

def f(x):
    return abs(C0+C1*x+C2*x*x+C3*x*x*x)


ANS=[f(L),f(R),f((L+R)/2),f((L+R)/3),f((L+R)/3*2)]

if C2*C2-3*C1*C3>=0:
    x=(C2*C2-3*C1*C3)**(1/2)

    if 3*C3!=0 and L<=(-C2+x)/(3*C3)<=R:
        ANS.append(f((-C2+x)/(3*C3)))
    if 3*C3!=0 and L<=(-C2-x)/(3*C3)<=R:
        ANS.append(f((-C2-x)/(3*C3)))

if C2!=0 and L<=-C1/(2*C2)<=R:
    ANS.append(f(-C1/(2*C2)))

for i in range(10**6):
    x=L+(R-L)/(10**6)*i
    ANS.append(f(x))
    
print(min(ANS))