#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <limits.h>
#include <stdbool.h>
int cmpfun(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),cmpfun);
    unsigned long long int count=0;
    for(int i=0;i<n;i++){
        count=count+(calories[n-i-1]*pow(2,i));
    }
    printf("%llu\n",count);
}