/*
    written by Pankaj Kumar.
    country:-INDIA
*/
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
typedef long long ll ;
typedef vector<ll> vl;
#define speed cin.tie(0);cout.tie(0);ios_base::sync_with_stdio(0);
/*  Abbrevations  */
#define ff first
#define ss second
#define mp make_pair
#define line cout<<endl;
#define pb push_back
#define Endl "\n"
// loops
#define forin(arr,n) for(ll i=0;i<n;i++) cin>>arr[i];
// Some print
#define no cout<<"NO"<<endl;
#define yes cout<<"YES"<<endl;
// sort
#define all(V) (V).begin(),(V).end()
#define srt(V) sort(all(V))
#define srtGreat(V) sort(all(V),greater<ll>())
// some extra
#define printv(v) for(ll i=0;i<ll(v.size());i++){cout<<v[i]<<" ";} line;
#define sz(V) ll(V.size())
// template
template <typename T>
T mymax(T x,T y)
{
    return (x>y)?x:y;
}
// function
ll power(ll x,ll y,ll mod)
{
    ll res=1;
    // x=x%mod;
    while(y>0)
    {
        if(y%2==1)
        {
            res*=x;
            // res=res%mod;
        }
        y/=2; x*=x; // x=x%mod;
    }
    return res;
}
ll str_to_num(string s)
{
    return stoi(s);
}

string num_to_str(ll num)
{
    return to_string(num);
}
// datatype definination
#define ordered_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>
class Point
{
    public:
        ll x;
        ll y;
        ll z;
        ll getsum()
        {
            return x+y+z;
        }
};
/* ascii value 
A=65,Z=90,a=97,z=122
*/
/*  -----------------------------------------------------------------------------------*/
// to run ctrl+b

ll solve()
{
    ll n;
    cin>>n;
    vl v(n),v2(n);
    forin(v,n);
    forin(v2,n);
    ll sum=0;
    for(ll i=0;i<n;i++)
    {
        sum+=(v[i]*v2[i]);
    }
    if(sum==0)
        cout<<"Yes"<<endl;
    else
        cout<<"No"<<endl;
    return 0;
}

int main()
{
    speed;
    /* #ifndef ONLINE_JUDGE
        freopen("input.txt","r",stdin);
        freopen("output.txt","w",stdout);
    #endif */
    ll TestCase=1;
    // cin>>TestCase;
    while(TestCase--)
    {
        solve();
    }
}

/* stuff you should look before submission 
* int overflow
* special test case (n=0||n=1||n=2)
* don't get stuck on one approach if you get wrong answer
*/
#include <bits/stdc++.h>

using namespace std;

#define double long double
#define int long long
const int mod = 1e9 + 7;
const int N = 1e5 + 50;

int a[N];
int n;

double getSum(double x) {
    double ret = 0;
    for (int i = 0; i < n; i++) {
        ret += x + (double) a[i] - min((double) a[i], (double) 2.0 * x);
    }

    return ret;
}

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);


    cin >> n;

    for (int i = 0; i < n; i++)
        cin >> a[i];

    double l = 0;
    double r = 1e9+1;

    int iter = 100;
    while (iter--) {
        double m1 = l + (r - l) / 3.0;
        double m2 = r - (r - l) / 3.0;
        double f1 = getSum(m1);
        double f2 = getSum(m2);
        if (f1 > f2) {
            l = m1;
        } else {
            r = m2;
        }
    }

    cout << fixed << setprecision(6) << getSum(l) / n << '\n';
}


