import java.util.Scanner;

public class Main {
	
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		final long N = sc.nextLong();
		final long K = sc.nextLong();
		
		final long ok = N / (K + 1) + 1;
		System.out.println(ok);
	}
}