//
// FourthSum.java: prompt user for numbers, raise each to the 
//                 fourth power (efficiently), and compute the sum
//
// No package declarations to keep people from trying to use this lame code....
//

import java.util.Scanner;

public class FourthSum {

   // return x to the third power
   public static int fourthPower(int x) {
      x *= x;
      return x * x;
   }

   // return sum of fourth powers of given numbers
   //    does not use lambda for campatibility with Java 7
   public static int sumOfFourthPowers(int[] numbers) {
      int sum = 0;
      for(int n : numbers)
         sum += fourthPower(n);
      return sum;
   }

   public static void main(String[] args) {
      Scanner in = new Scanner(System.in);
      System.out.print("Enter number(s) on one line: ");
      String input = in.nextLine().trim();
      String[] items = input.split(" +"); // "\\s+" to allow tabs
      if ( items.length == 1 ) {
         int n = Integer.parseInt(items[0]);
         System.out.println("To fourth power: " + fourthPower(n));
      } else {
         int nums[] = new int[items.length];
         for(int i = 0; i < items.length; i++)
            nums[i] = Integer.parseInt(items[i]);
         System.out.println("Sum of x^4: " + sumOfFourthPowers(nums));
      }
   }

}