a,b,c,d=map(int,input().split())
L,R=map(int,input().split())
def f(x):
    return a+b*x+c*x*x+d*x*x*x
mi=min(f(L),f(R))
ma=max(f(L),f(R))
eps=1e-7
if d:
    if c*c-3*b*d>=0:
        D=c*c-3*b*d
        for i in ((-c+D**.5)/(3*d),(-c-D**.5)/(3*d)):
            if L-eps<=i<=R+eps:
                mi=min(mi,f(i))
                ma=min(ma,f(i))
else:
    if c:
        i=(-b)/(2*c)
        if L-eps<=i<=R+eps:
            mi=min(mi,f(i))
            ma=min(ma,f(i))
if mi<eps and -eps<ma:
    ans=0
else:
    ans=min(abs(mi),abs(ma))
print(ans)