Question 3 Chef Cooks Java Solution

import java.util.*;
class Chefcooks{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int t = sc.nextInt();
        while (t-- > 0) {
            int l = sc.nextInt();
            long result = (long) Math.pow(2, l);
            result--;
            System.out.println(result);
        }
        sc.close();
    }
}