using System;
using System.Linq;
using System.Collections.Generic;

namespace FashionBoutique
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] clothValues = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();

            int racks = 0;

            int sum = 0;

            int capacity = int.Parse(Console.ReadLine());

            Stack<int> box = new Stack<int>();

            foreach (var cloth in clothValues)
            {
                box.Push(cloth);
            }

            while (box.Count > 0)
            {
                sum = sum + box.Pop();

                if (sum < capacity)
                {
                    continue;
                }
                else if (sum == capacity)
                {
                    racks += 1;
                    sum = box.Pop();
                }
                else if (sum > capacity)
                {
                    racks += 2;
                    sum = box.Pop();
                }
            }
            Console.WriteLine(racks);
        }
    }
}