#include <bits/stdc++.h>
#define For(i, a, b) for(int i = a; i < b; i++)
#define rep(i, n) For(i, 0, n)
#define rFor(i, a, b) for(int i = a; i >= b; i--)
#define ALL(v) (v).begin(), (v).end()
#define rALL(v) (v).rbegin(), (v).rend()
using namespace std;

using lint = long long;
using ld = long double;

int INF = 2000000000;
lint LINF = 1000000000000000000;

int main() {
    ld c0, c1, c2, c3, l, r;
    cin >> c0 >> c1 >> c2 >> c3 >> l >> r;
    ld ans = INF;
    for (ld x = l; x <= r; x += 0.000001) {
        ld y = abs(c0 + c1 * x + c2 * x * x + c3 * x * x * x);
        ans = min(ans, y);
    }
    cout << fixed << setprecision(6) << ans << endl;
}