using System;

namespace Elevator
{
    class Program
    {
        static void Main(string[] args)
        {
            int numPeople = int.Parse(Console.ReadLine());
            int minPeople = int.Parse(Console.ReadLine());
            int counter = 0;
            int agent = 0;
            while (agent == 0)
            {
                numPeople -= minPeople;
                counter++;
                if (numPeople <= 0)
                {
                    agent = 1;
                }
            }
            Console.WriteLine(counter);
        }
    }
}