#include <bits/stdc++.h>
using namespace std;

        /*Author*/
        /*plab0n*/
#define MAX 12345678;
#define max(x,y) ((x) >= (y) ? (x) : (y))
#define min(x,y) ((x) < (y) ? (x) : (y))
#define scI(a) scanf("%d",&a);
#define scLL(a) scanf("%lld",&a);
#define scI2(a,b) scanf("%d%d",&a,&b);
#define scLL2(a,b) scanf("%lld%lld",&a,&b);

#define dekhao(a) printf("%lld\n",a);
#define dekhao2(a,b) printf("%d %d\n",a,b);
#define loop(i,n) for(i=0; i<n; i++)

int main()
{
    int n,a[105],i;
    long long sum = 0;

    scI(n);
    loop(i,n)
    {
        scI(a[i]);
    }
    sort(a,a+n);
    int j = 0;
    for(i=n-1; i>=0; i--)
    {
        sum+=(long long)pow(2,j)*a[i];
        j++;
        //cout<<sum<<endl;
    }
    dekhao(sum);
}