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

namespace _0446
{
    class Program
    {
        static void Main(string[] args)
        {
            var num = Console.ReadLine().Split(' ').Select(x => Int64.Parse(x)).ToArray();
            var n = num[0];
            var k = num[1];


            Console.WriteLine((n / (k + 1)) + 1);

        }
    }
}