C = list(map(int, input().split()))
L, R = map(int, input().split())
ans = 10 ** 18
M = 10 ** 6
for i in range(M + 1):
	x = L + (R - L) / M * i
	ans = min(ans, abs(C[0] + C[1] * x + C[2] * x * x + C[3] * x * x * x))
print(ans)