import java.util.Arrays;
import java.util.Scanner;

public class Sequence {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int[] inputNumbers = Arrays.stream(scanner.nextLine().split("\\s+")).
                mapToInt(Integer::parseInt).toArray();

        int k = inputNumbers[0];
        int n = inputNumbers[1];

        int[] cache = new int[n];
        cache[0] = k;

        System.out.println(getElement(k,n,cache,1));



    }

    private static int getElement(int k, int n, int[] cache, int count) {

        if (count>=n){
            return cache[n-1];
        }


        cache[count] = k+1;

        if (count+1<n) {
            cache[count + 1] = (2 *k)+1;
        }

        if (count+2<n) {
            cache[count + 2] = k+2;
        }

        return getElement(cache[count], n, cache,count+3);

    }

}