import java.io.BufferedReader;
import java.io.InputStreamReader;

public class No175 {

    public static void main(String[] args) {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(
                    System.in));
            int L = Integer.parseInt(br.readLine());
            int N = Integer.parseInt(br.readLine());

            long ans = (long) (Math.pow(2, L - 3) * N);

            System.out.println(ans);

        } catch (Exception e) {
            System.err.println("Error:" + e.getMessage());
        }
    }

}