package no477;

import java.util.Scanner;

public class Main {

	//自分より与えたダメージが同じか大きい人がK人居た場合ダメ
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long n = sc.nextLong();
		long k = sc.nextLong();
		System.out.println(n / (k + 1) + 1);
	}

}