import java.io.PrintWriter;
import java.util.*;
import java.util.concurrent.SynchronousQueue;

public class Main {
	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);
	}

	static void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}
}