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

class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int len=Integer.parseInt(br.readLine());
		int pat=Integer.parseInt(br.readLine());
		br.readLine();
		br.close();
		int sum=1;
		int n=(len-3)/3;
		for(int i=0;i<n;i++){
			sum*=8;
		}
		System.out.println(sum*pat);
	}
}