C0, C1, C2, C3 = gets.split.map(&:to_f)
L, R = gets.split.map(&:to_f)

candidates = [L, R]

# 微分する f'(x) = ax2 + bx + c
a = 3 * C3
b = 2 * C2
c = C1

if a != 0
    d = b**2 - 4 * a * c
    if d >= 0
        candidates << (-b + Math.sqrt(d)) / (2 * a)
        candidates << (-b - Math.sqrt(d)) / (2 * a)
    end
else
    if b != 0
        candidates << (-c / b)
    end
end


candidates.filter! { L <= _1 and _1 <= R }

ans = candidates.map { |x| (C0 + (C1 + (C2 + C3 * x) * x) * x).abs }.min
puts ans