object Solution {

    def main(args: Array[String]) {
        val sc = new java.util.Scanner (System.in);
        var n = sc.nextInt();
        var calories = new Array[Int](n);
        for(calories_i <- 0 to n-1) {
           calories(calories_i) = sc.nextInt();
        }
        // your code goes here
        calories = calories.sorted.reverse;
        var sum:Long = 0;
        var mul:Long = 1;
        for(i<- 0 to n - 1) {
            sum += (mul * calories(i))
            mul *= 2
        }
        println(sum)
    }
}