#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define fr first
#define sc second
#define ARRS int(3e5+11)
#define MAX ((long long)(1e9+1))
#define HS1 ((long long)(1000001329))
#define HS2 ((long long)(1000001531))
#define MOD ((long long)1000000007)
#define PI 3.14159265358979323846264338327950288419716



ll a[ARRS];
ll pas[ARRS];
ll t,n,m,q;
ll dp1[ARRS][30];
ll dp[ARRS];
ll dp2[ARRS];



string s;
ll l;
int main(){
    #ifdef KHOKHO
        freopen("in.in","r",stdin);
        freopen("out.out","w+",stdout);
    #endif //KHOKHO
    cin>>n;
    for(int i=0; i<n; i++){
        cin>>a[i];
    }
    sort(a,a+n);
    reverse(a,a+n);
    ll pas=0;
    for(int i=0; i<n; i++){
        pas+=(1ll<<i)*a[i];
    }
    cout<<pas;
    return 0;
}