a,b,c,d=map(int,input().split())
L,R=map(int,input().split())
def f(x):
    return abs(a+b*x+c*x*x+d*x*x*x)
ans=min(f(L),f(R))
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<=i<=R:
                ans=min(ans,f(i))
else:
    if c:
        i=(-b)/(2*c)
        if L<=i<=R:
            ans=min(ans,f(i))
print(ans)