import numpy as np

def f(x):
    return abs(c[0] + c[1] * x + c[2] * x * x + c[3] * x * x * x)

c = list(map(int, input().split()))
l, r = map(int, input().split())
# print(c)
# print(np.roots([3*c[3],2*c[2], c[1]]))
X = [l, r] + list(np.roots([3*c[3],2*c[2], c[1]])) + list(np.roots([c[3], c[2], c[1], c[0]]))
ans = 10 ** 18
# print(X)
for x in X:
    if l <= x <= r and x.imag == 0:
        ans = min(ans, f(x))

print(ans)