/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		List<Integer> vals = new ArrayList<>();
		vals.add(1);
		vals.add(2);
		vals.add(3);
		sumOfSquares(vals);
		for (int i = 0 ; i != vals.size(); i++) {
			System.out.println(vals.get(i));
		}
	}
 
	public static int sumOfSquares(List<Integer> num) {
    if (num.isEmpty()) {
        return 0;
    }
    int hold= num.get(0)*num.get(0);
    num.add(1, hold);
 
 
    return num.get(1) + sumOfSquares(num.subList(2, num.size()));
}
 
 
}

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