using System;

class Program
{
	public static void Main()
	{
		string s = Console.ReadLine();
		string[] sAry = s.Split(' ');
		long N = long.Parse(sAry[0]);
		long K = long.Parse(sAry[1]);

		long a = N / (K + 1);
		long ans = a + 1;

		Console.WriteLine("{0}", ans);

	}
}