#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));

	if (c3 != 0 && 4 * c2 * c2 - 12 * c1 * c3 >= 0) {
		double d = sqrt(4 * c2 * c2 - 12 * c1 * c3);
		double x1 = (-2 * c2 + d) / (6 * c3);
		double x2 = (-2 * c2 - d) / (6 * c3);
		if (l <= x1 && x1 <= r) {
			mi = min(mi, f(x1));
			ma = max(ma, f(x1));
		}
		if (l <= x2 && x2 <= r) {
			mi = min(mi, f(x2));
			ma = max(ma, f(x2));
		}
	} else if (c3 == 0 && c2 != 0) {
		double x = (double)c1 / (2 * c2);
		if (l <= x && x <= r) {
			mi = min(mi, f(x));
			ma = max(ma, f(x));
		}
	}
	if (mi * ma <= 0) {
		cout << fixed << setprecision(16) << 0.0 << endl;
	} else {
		cout << fixed << setprecision(16) << min(abs(mi), abs(ma)) << endl;
	}
}