import java.util.Scanner;
public class Test15 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s = sc.nextLine();

		String[]ss= s.split(" ");
		long a=Integer.parseInt(ss[0]);
		long b=Integer.parseInt(ss[1]);

		long c=a/(b+1);
		
		System.out.println(c+1);
	}
}