public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.println(1 << (in.nextInt() - 1));
}
}
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.println(1 << (in.nextInt() - 1));
}
}
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