import java.util.Scanner;


public class Main_yukicoder175 {

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

        int l = sc.nextInt();
        int n = sc.nextInt();

        int ret = 1;
        for (int i = 0; i < l - 3; i++) {
        	ret *= 2;
        }
        
        System.out.println(ret * n);
        
        sc.close();
    }
}