1 package excel; 2 3 import java.util.Scanner; 4 5 public class doExcel { 6 public static void main(String args[]){ 7 8 9 System.out.println(f(2,4)); 10 11 12 } 13 14 15 static int f(int a,int n){ 16 if(n>1){ 17 return pf(f(a,n/2)); 18 19 }else{ 20 return a; 21 22 } 23 } 24 25 static int pf(int a){ 26 return a*a; 27 } 28 29 30 }