namespace FashionBoutique
{
    using System;
    using System.Linq;
    using System.Collections.Generic;

    class Boutique
    {
        static void Main(string[] args)
        {
            Stack<int> stackOfClothes = new Stack<int>(Console.ReadLine().Split().Select(int.Parse));

            int clothesSum = 0; //saveCapacity
            int rackCounter = 1; // racks

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

            for (int i = 0; i < stackOfClothes.Count; i++)
            {
                //int currentNum = clothes.Peek();
                int currentCloth = stackOfClothes.Peek();


                // if (currentNum + saveCapacity <= capacity)
                if (currentCloth + clothesSum <= rackCapacity)
                {
                    // saveCapacity += clothes.Pop();
                    clothesSum += stackOfClothes.Pop();
                }
                else
                {
                    // saveCapacity = clothes.Pop();
                    clothesSum = stackOfClothes.Pop();
                    rackCounter++;
                }
            }
            Console.WriteLine(rackCounter);
        }
    }
}