using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _2._3.Elevator
{
    class Program
    {
        static void Main(string[] args)
        {

            int peopleNumN = int.Parse(Console.ReadLine());
            int capacityNumP = int.Parse(Console.ReadLine());

            int courses = (int)Math.Ceiling((double)peopleNumN / capacityNumP);

            if (peopleNumN <= capacityNumP)
            {
                Console.WriteLine(courses);
            }
            else
            {
                Console.WriteLine(courses);
            }


        }
    }
}