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

public class yukicoder
{
    public static void Main()
    {
        ulong[] input = Console.ReadLine().Trim().Split(' ').Select(x => ulong.Parse(x)).ToArray();
        
        Console.WriteLine((input[0] / (input[1] + 1)) + 1);
    }
}