using System;
using System.Linq;

namespace No388
{
    class Program
    {
        static void Main(string[] args)
        {
            var SF = Console.ReadLine().Split(' ').Select(i => int.Parse(i)).ToArray();
            var S = SF[0];
            var F = SF[1];

            var result = 0;
            while (S >= 0)
            {
                S -= F;
                result++;
            }

            Console.Write(result);
        }
    }
}