#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <limits.h>
#include <stdbool.h>
int cmpfunc (const void * a, const void * b)
{
   return ( *(int*)a - *(int*)b );
}
int main(){
    int n; 
    scanf("%d",&n);
    int *calories = malloc(sizeof(int) * n);
    for(int calories_i = 0; calories_i < n; calories_i++){
       scanf("%d",&calories[calories_i]);
    }
    qsort(calories,n,sizeof(int),cmpfunc); 
    long long int a=0; int i;
    for(i=n-1;i>=0;i--){
        a=a+calories[i]*pow(2,n-1-i);
    }
    printf("%lld",a);
    // your code goes here
    return 0;
}