import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

    	Scanner sc = new Scanner(System.in);
    	int hit = sc.nextInt();
    	int mem = sc.nextInt();
    	int ans = 0;
    	int hit2 = hit-hit%(mem+1);

    	ans=hit2/(mem+1);
    	System.out.println(ans+1);
    }

}