import time
import random


class Timer:
    def __init__(self, timelimit):
        self.start_time = time.time()
        self.timelimit = timelimit

    def timeover(self):
        return (time.time() - self.start_time) >= self.timelimit

    def elapsed(self):
        return time.time() - self.start_time


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


def main():
    c = list(map(int, input().split()))
    l, r = list(map(int, input().split()))

    timer = Timer(1.9)
    ans = float("inf")

    while not timer.timeover():
        x = random.uniform(l, r)
        ans = min(ans, abs(f(x, c)))

    print(ans)


if __name__ == "__main__":
    main()