import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;

public class Sol1 {

public static   void main(String args[])  throws  IOException{
	
	
	
	BufferedReader br = new BufferedReader (new InputStreamReader(System.in));
     int n =Integer.parseInt(br.readLine());
     
     int arr[]= new int[n];
     String s =br.readLine();
     String ss[]= s.split(" ");
     for(int i =0; i<n ; i++){
    	 arr[i]=-Integer.parseInt(ss[i]);
     }

fun(arr);
}

private static void fun(int[] arr) {
	
	
	Arrays.sort(arr);
	int sum[]= new int[arr.length];
	sum[0]=arr[0];
	for(int i =1; i<arr.length ; i++){sum[i]=sum[i-1]+arr[i];}
	long cost=0;
	for(int i =0; i<arr.length; i++){
		cost += -(Math.pow(2 , i))*   arr[i];
	}
	
	System.out.println(cost);
	
	
	
	
}
}