#include <bits/stdc++.h>
#include <atcoder/all>
using mint = atcoder::static_modint<998244353>;
//using mint = atcoder::static_modint<1000000007>;
using namespace std;
using namespace atcoder;
using ld = long double;
using ll = long long;
#define mp(a,b) make_pair(a,b)
#define rep(i,s,n) for(int i=s; i<n; i++)
const vector<int> dx{1,0,-1,0},dy{0,1,0,-1};

ld get(ld x,vector<ll>&c){
    ld out=0;
    ld p=1;
    rep(i,0,4){
        out+=p*c[i];
        p*=x;
    }
    out=abs(out);
    return out;
}
int main(){
    vector<ll> c(4);rep(i,0,4)cin >> c[i];
    int l,r;
    cin >> l >> r;
    int m=1000000;
    ld ans=1e18;
    rep(i,0,m+1){
        ld x=l+(r-l)/(ld)m*i;
        ans=min(ans,get(x,c));
    }
    // if(ans<1e-6){
    //     cout << 0;
    // }
    // else cout << setprecision(16)<< ans;
    printf("%f",ans);
}