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

namespace _05_Fashion_Boutique
{
    class Program
    {
        static void Main(string[] args)
        {
            var priceOfClothes = Console.ReadLine().Split().Select(int.Parse).ToArray();

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

            Stack<int> prices = new Stack<int>(priceOfClothes);

            int sumOfClothes = 0;
            int numOfRacks = 1;

            //5 4 8 6 3 8 7 7 9 --- orders
            //16 -- capacity 

            for (int i = 0; i < priceOfClothes.Length; i++)
            {


                sumOfClothes += priceOfClothes[i];

                if (sumOfClothes == capacityOfARack)
                {
                    numOfRacks++;
                    sumOfClothes = 0;



                    if (prices.Any())
                    {
                        continue;
                    }
                }

                else if (sumOfClothes > capacityOfARack)
                {

                    numOfRacks++;
                    sumOfClothes = 0;
                    i--;


                    if (prices.Any())
                    {
                        continue;
                    }
                }

                prices.Pop();

            }

            Console.WriteLine(numOfRacks);
        }
    }
}