import java.io.ByteArrayInputStream;
import java.util.LinkedList;
import java.util.Queue;
import java.util.Scanner;

public class Sequence {
    private static void testIn() {
        String input = "2 4\n";
        System.setIn(new ByteArrayInputStream(input.getBytes()));
    }

    public static void main(String[] args) {
        testIn();
        Scanner scanner = new Scanner(System.in);
        String[] input = scanner.nextLine().split(" ");
        int k = Integer.parseInt(input[0]);
        int n = Integer.parseInt(input[1]);
        int result = 0;
        Queue<Integer> queue = new LinkedList<>();
        queue.offer(k);
        if (n > 1) {
            for (int i = 1, counter = 1; i < n; i++) {
                if (counter == 1) {
                    counter++;
                    result = queue.peek() + 1;
                    queue.offer(result);
                } else if (counter == 2) {
                    counter++;
                    result = 2 * queue.peek() + 1;
                    queue.offer(result);
                } else if (counter == 3) {
                    counter = 1;
                    result = queue.peek() + 2;
                    queue.offer(result);
                    queue.poll();
                }
            }
            System.out.println(result);
        } else {
            System.out.println(k);
        }
    }
}