#include <iostream>
#include <algorithm>
using namespace std;

int main(){
    int n;cin>>n;
    int arr[n];for(int i=0;i<n;++i)cin>>arr[i];
    sort(arr,arr+n);
    unsigned long long ans = 0;
    for(int i=n-1;i>=0;--i){
        unsigned long long power = ((unsigned long long)(1))<<(n-1-i);
        ans+=(power*arr[i]);
    }
    cout<<ans;
}