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

ans = [f(L), f(R)]

if d != 0:
  p = c * c / (3 * d) - b
  if p == 0:
    x = -c / (3 * d)
    ans.append(f(x))
  elif p > 0:
    p /= (3 * d)
    p = p ** 0.5
    x, y = p - c, -p - c
    x, y = x / (3 * d), y / (3 * d)
    ans.append(f(x))
    ans.append(f(y))

else:
  if c != 0:
    x = -b / (2 * c)
    ans.append(f(x))

m, M = min(ans), max(ans)

if m * M <= 0:
  print(0)
else:
  print(min(abs(m), abs(M)))