//let's do it
 #include <iostream>
#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define inf 1000000000000
#define mod 1000000007
#define pb push_back
#define mp make_pair
#define all(v) v.begin(),v.end()
#define S second
#define F first
#define boost1 ios::sync_with_stdio(false);
#define boost2 cin.tie(0);
#define mem(a,val) memset(a,val,sizeof a)
#define endl "\n"
#define maxn 100001

ll a[maxn],power[maxn];

int main()
{
    boost1;boost2;
    ll i,j,n,ans=0;
    cin>>n;
    for(i=1;i<=n;i++)
    cin>>a[i];
    sort(a+1,a+n+1);
    power[0]=1;
    for(i=1;i<=50;i++)
    power[i]=2LL*power[i-1];
    reverse(a+1,a+n+1);
    for(i=1;i<=n;i++)
    ans+=power[i-1]*a[i];
    cout<<ans;
    return 0;
}