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

def f(x):
    return abs(C0+C1*x+C2*x**2+C3*x**3)

if C3!=0:
    X1=(-C2+(C2**2-12*C1*C2)**0.5)/3/C3
    X2=(-C2-(C2**2-12*C1*C2)**0.5)/3/C3
    ans=min(f(L),f(R))

    if L<=X1<=R:
        ans=min(ans,f(X1))
    if L<=X2<=R:
        ans=min(ans,f(X2))
else:
    if C2!=0:
        X=-C1/2/C2
        ans=min(f(L),f(R))
    else:
        if C1!=0:
            ans=min(f(L),f(R))
        else:
            ans=0
print(ans)