import java.util.Scanner;

public class Test {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int m = sc.nextInt()-3, n = sc.nextInt();
		String s = sc.nextLine();
		for(int i = 0; i < m; i++){
			n*=2;
		}
		System.out.println(n);
	}
}