using System;
using System.Linq;

public class Program
{
    public static void Main()
    {
        var elements = Console.ReadLine()
            .Split()
            .Select(long.Parse)
            .ToList();

        long sum = 0;
        while (elements.Count > 0)
        {
            int index = int.Parse(Console.ReadLine());

            long element;
            if (index < 0)
            {
                element = elements[0];
                elements[0] = elements[elements.Count - 1];
            }
            else if (index >= elements.Count)
            {
                element = elements[elements.Count - 1];
                elements[elements.Count - 1] = elements[0];
            }
            else
            {
                element = elements[index];
                elements.RemoveAt(index);
            }

            sum += element;
            for (int i = 0; i < elements.Count; i++)
            {
                if (elements[i] <= element)
                {
                    elements[i] += element;
                }
                else
                {
                    elements[i] -= element;
                }
            }
        }

        Console.WriteLine(sum);
    }
}