import sympy as sp

C1, C2, C3, C4 = map(int, input().split())
L, R = map(int, input().split())

x = sp.symbols('x')
f = C1 + C2*x + C3*(x**2) + C4*(x**3)

baaiwake = sp.Piecewise(
    (f, f >= 0),
    (-f, f < 0)
)

points = sp.solveset(sp.diff(baaiwake, x), x, domain=sp.Interval(L, R))
check = [L, R] + [pt for pt in points if L <= pt <= R]

ans = None
for pt in check:
    val = baaiwake.subs(x, pt)
    if ans is None or val < ans:
        ans = val

print(ans)