package excel;

 import java.util.Scanner;

 public class doExcel {

     public static void main(String args[]){

         System.out.println(f(2,4));

     }

     static int f(int a,int n){

         if(n>1){

             return pf(f(a,n/2));

         }else{

             return a;

         }

     }

     static int pf(int a){

     return a*a;

     }

 }