class Program
    {
        static void Main(string[] args)
        {
            string stairs = Console.ReadLine();
            string[] strList = stairs.Split(' ');
            int max = int.Parse(strList[0]);
            int onceStairs = int.Parse(strList[1]);
            int count = 0;
            while(max >= 0)
            {
                max -= onceStairs;
                count++;
            }
            Console.WriteLine(count);
        }
    }