#include <bits/stdc++.h>
using namespace std;

void fast_io() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
}

int main() {
	fast_io();
	int c0, c1, c2, c3;
	cin >> c0 >> c1 >> c2 >> c3;
	int l, r;
	cin >> l >> r;
	auto f = [&](double x) {
		return c0 + c1 * x + c2 * x * x + c3 * x * x * x;
	};
	double mi = min(f(l), f(r));
	double ma = max(f(l), f(r));
	double d0 = c1, d1 = 2 * c2, d2 = 3 * c3;
	if (d2 != 0) {
		double D = d1 * d1 - 4 * d0 * d2;
		if (D > 0) {
			double x1 = (-d1 + sqrt(D)) / (2 * d2);
			double x2 = (-d1 - sqrt(D)) / (2 * d2);
			if (x1 > l && x1 < r) {
				mi = min(mi, f(x1));
				ma = max(ma, f(x1));
			}
			if (x2 > l && x2 < r) {
				mi = min(mi, f(x2));
				ma = max(ma, f(x2));
			}
		}
	} else if (d1 != 0) {
		double x = -d0 / d1;
		if (x > l && x < r) {
			mi = min(mi, f(x));
			ma = max(ma, f(x));
		}
	}
	if (mi <= 0 && ma >= 0) {
		cout << setprecision(16) << fixed << 0.0 << endl;
	} else {
		cout << setprecision(16) << fixed << min(abs(mi), abs(ma)) << endl;
	}
}